Howard County, Maryland v. FAA ( 2020 )


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  •                                     PUBLISHED
    UNITED STATES COURT OF APPEALS
    FOR THE FOURTH CIRCUIT
    No. 18-2360
    HOWARD COUNTY, MARYLAND,
    Petitioner,
    v.
    FEDERAL        AVIATION       ADMINISTRATION;           STEPHEN       DICKSON,
    Administrator, Federal Aviation Administration,
    Respondents.
    On Petition for Review of Orders of the Federal Aviation Administration.
    Submitted: March 26, 2020                                    Decided: August 11, 2020
    Before MOTZ, DIAZ, and RUSHING, Circuit Judges.
    Petition dismissed by published opinion. Judge Diaz wrote the opinion, in which Judge
    Motz and Judge Rushing joined.
    Gary W. Kuc, County Solicitor, Lewis J. Taylor, Senior Assistant County Solicitor,
    Melissa E. Goldmeier, Assistant County Solicitor, HOWARD COUNTY OFFICE OF
    LAW, Ellicott City, Maryland, for Petitioner. Jeffrey Bossert Clark, Assistant Attorney
    General, Eric Grant, Deputy Assistant Attorney General, J. David Gunter II, Environment
    and Natural Resources Division, UNITED STATES DEPARTMENT OF JUSTICE,
    Washington, D.C.; John E. Doyle, Anne Christenson, Lane N. McFadden, FEDERAL
    AVIATION ADMINISTRATION, Bloomington, Indiana, for Respondent.
    DIAZ, Circuit Judge:
    In February 2016, the Federal Aviation Administration (“FAA”) modified an air-
    traffic procedure, or series of flight routes, that governs westbound departing aircraft at
    Baltimore/Washington International Thurgood Marshall Airport (“BWI”). The modified
    procedure, called “TERPZ-6,” directs westbound aircraft to depart over historic areas of
    Howard County, Maryland that had previously endured little air traffic, and at altitudes
    below 3,000 feet, bringing with them allegedly insufferable levels of noise.
    In November 2018, the County brought this petition to vacate or set aside the
    TERPZ-6 departure procedure on the ground that the FAA failed to comply with a
    constellation of environmental statutes and regulations when assessing its likely noise
    impacts. But the FAA contends that the petition is untimely under 
    49 U.S.C. § 46110
    (a)
    because it was filed well over sixty days after the issuance of the agency’s relevant order,
    and the County fails to show reasonable grounds for not filing on time. We agree, finding
    that the County unreasonably waited 110 days to demand voluntary relief from the FAA
    as a first resort, and six months for the agency to come to the table.
    We therefore dismiss the petition.
    I.
    We begin with an overview of the FAA’s implementation of TERPZ-6 and the
    thirty-three-month aftermath leading to this lawsuit.
    2
    A.
    Pursuant to the Federal Aviation Act of 1958, 
    49 U.S.C. § 40101
     et seq., the FAA
    is authorized to prescribe regulations “for the [safe and efficient] use of the navigable
    airspace,” 
    id.
     § 40103(b)(1). Such regulations naturally include “air traffic regulations”
    (comprising arrival, departure, and en route procedures), which govern the path and altitude
    of aircraft moving through the navigable airspace. Id. § 40103(b)(2).
    For many years, the FAA used “conventional” air-traffic procedures that relied on
    ground-based navigation aids and verbal instructions (called “vectors”) radioed in from an
    air-traffic controller. But that began to change in the early 2000s, when, as air travel was
    booming and new technologies were precipitating, the FAA introduced so-called “area
    navigation” procedures, or “RNAV” for short. Unlike the conventional variety, RNAV
    procedures are entered directly into an aircraft’s on-board flight management (i.e.,
    computer) system, using satellite technology to navigate the aircraft from point A to B.
    Because flight operations are thus significantly more automated than before, RNAV
    procedures tend to boast greater efficiency, precision, and safety.
    Seeking to encourage the transition away from conventional air-traffic procedures,
    Congress in 2012 enacted legislation directing the FAA “to modernize the nation’s air-
    traffic control system.” City of Phoenix v. Huerta, 
    869 F.3d 963
    , 966 (D.C. Cir. 2017),
    opinion amended on reh’g, 
    881 F.3d 932
     (D.C. Cir. 2018); see FAA Modernization and
    Reform Act of 2012, Pub. L. No. 112-95, §§ 101(a), 213(a)(1)(A), 
    126 Stat. 11
    , 15, 46–47
    (2012). Among other so-called “Next Generation” or “NextGen” technologies that the
    legislation promotes, it directs the FAA to make greater use of RNAV and other such
    3
    “performance-based navigation procedures” at the nation’s thirty-five busiest airports. See
    Pub. L. No 112-95, § 213, 126 Stat. at 46–50. The FAA’s ongoing and nationwide
    initiative to implement the legislation is likewise called “NextGen.”
    “Spurred by this new legislation,” in 2013, the FAA developed a package of forty-
    one new and modified air-traffic procedures, nicknamed the “D.C. Metroplex,” to guide
    arriving and departing aircraft at the three major airports in the Washington, D.C. area.
    Citizens Ass’n of Georgetown v. Fed. Aviation Admin., 
    896 F.3d 425
    , 429 (D.C. Cir. 2018).
    Those airports include BWI, the busiest in the D.C. area, which is owned and operated by
    the Maryland Aviation Administration (“MAA”) and located nine miles south of
    downtown Baltimore, in an unincorporated area of Anne Arundel county.
    In developing the D.C. Metroplex procedures, the FAA was obliged to comply with
    “a constellation of statutory and regulatory schemes designed to ensure that federal
    agencies properly account” for the environmental impact of their decisions, including with
    respect to noise levels.    
    Id.
       At the center of that constellation lies the National
    Environmental Policy Act, 
    42 U.S.C. § 4321
     et seq., which requires federal agencies to
    prepare an environmental impact statement for all major actions “significantly affecting
    the quality of the human environment,” 
    id.
     § 4332(C). If an agency is unsure whether a
    proposed action will cause a significant environmental impact, however, regulations
    promulgated by the Council on Environmental Quality, see 
    40 C.F.R. § 1500.1
     et seq.
    (which the Supreme Court has held “are entitled to substantial deference,” Marsh v. Oregon
    Nat. Res. Council, 
    490 U.S. 360
    , 372 (1989)), allow the agency to prepare an environmental
    assessment to determine whether a formal environmental impact statement is necessary,
    4
    see 
    id.
     § 1508.9(a)). If, following that environmental assessment, the agency concludes
    that the proposed action will not have a significant environmental impact, it may simply
    issue a finding to that effect, briefly explaining the reasons behind that conclusion, without
    preparing an environmental impact statement. Id. § 1508.13.
    Uncertain whether the D.C. Metroplex would have a significant impact, the FAA
    initiated its environmental review in December 2012 by distributing a notice of intent to
    prepare a draft environmental assessment. The FAA issued the draft for comments in June
    2013. The FAA then completed a final environmental assessment in November, which
    concluded that the proposed air-traffic procedures would “not have significant
    environmental impacts,” S.J.A. 2918, including and especially “significant noise impacts,”
    S.J.A. 2925; cf. FAA, Order 1050.1E, Environmental Impacts: Policies and Procedures,
    Appendix A (June 8, 2004) (setting forth the then-applicable criteria and procedures to be
    used in the agency’s environmental impact analysis). Finally, in December, the FAA
    issued a finding of no significant impact and corresponding record of decision explaining
    its conclusion and exempting the D.C. Metroplex procedures from further environmental
    review. See FAA, Finding of No Significant Impact and Record of Decision and Agency
    Concurrence Letters, Public Comment Letters and Responses to Comments, and
    Environmental Assessment Errata for the Washington D.C. Optimization of the Airspace
    and Procedures in the Metroplex (DC OAPM) (Dec. 2013) (the “Record of Decision”).
    Among the procedures approved in the Record of Decision was the fourth
    generation of the TERPZ line of departure procedures at issue here, called TERPZ-4, which
    went into effect at BWI on March 5, 2015. The fourth generation procedure directed
    5
    aircraft departing from BWI’s primary westbound runway to head out from the airport in
    a roughly due west orientation, before splitting off onto other routes depending on their
    destination. As a result, westbound departing aircraft largely stayed out of the airspace of
    Howard County, which spreads out further to the northwest of BWI, especially with respect
    to its more historic (and thus environmentally sensitive) residential areas. The next month,
    on April 30, 2015, the FAA republished the departure procedure under the name TERPZ-
    5, adding a single notation to the graphic depiction given to pilots while keeping the
    substantive flight routes identical to TERPZ-4.
    Seeking to further maximize the capacity of the airspace surrounding BWI, in fall
    2015 the FAA sought to further modify the TERPZ departure procedure (among a few
    others) to enable aircraft to depart more rapidly. Because these modifications would apply
    to currently approved air-traffic procedures, FAA regulations authorized the agency to
    forego a new environmental assessment and, instead, simply assess whether the proposed
    changes would significantly impact the environment.           See FAA, Order 1050.1F,
    Environmental Impacts: Policies & Procedures, ¶¶ 9-1–9-2 (July 16, 2015).             After
    modeling their likely noise impacts, on October 8, 2015 the FAA concluded that the
    modified procedures would not have a significant environmental impact and, as such,
    categorically exempted them from further environmental review pursuant to Order
    1050.1F. See id. ¶ 5-6.5(i).
    Meanwhile, MAA officials were growing concerned about noise impacts associated
    with the departure procedures approved under the D.C. Metroplex and implemented earlier
    in 2015. The MAA sent a letter to the FAA about these concerns on October 22, 2015,
    6
    stating that it had recently become aware of the noise impacts through a combination of
    attending local neighborhood association meetings and its own review of the departure
    procedures implemented since March 2015.             The MAA asserted that the final
    environmental assessment for the D.C. Metroplex hadn’t sufficiently accounted for the
    noise impacts of these procedures, such that the Record of Decision “was improperly issued
    and not representative of the actual implementation.” J.A. 1197. When the FAA didn’t
    promptly respond, the MAA lobbied three of Maryland’s then U.S. Representatives, who
    sent the FAA a similarly worded letter on November 13, 2015.
    Without responding to either letter, on December 1, 2015, the FAA’s D.C.
    Metroplex team briefed certain BWI authorities about the modifications that it had
    approved to TERPZ-5 and a few other departure procedures back in October. The FAA
    officials stated that the modifications were “minor” and meant to address “some concerns”
    that had come to light since March. J.A. 995. It’s unclear whether those concerns included
    the noise impacts highlighted in the MAA’s and Representatives’ recent letters.
    The TERPZ-6 departure procedure took effect on February 4, 2016, on which date
    the FAA published its administrative order with respect to the modified procedure. Among
    sixteen substantive flight-path changes, TERPZ-6 pushed westbound departing aircraft
    further to the northwest and thus nearer to historic residential areas of Howard County.
    And especially because the aircraft depart over the County at altitudes below 3,000 feet,
    many residents of these (and other) areas say that they have experienced insufferable levels
    of overhead noise, from early in the morning until late at night, ever since.
    7
    B.
    Only after rolling out TERPZ-6 did the FAA finally respond, on March 9, 2016, to
    the MAA’s letter of October 22, 2015. The FAA’s letter asserted that the noise impacts
    associated with the subject D.C. Metroplex procedures had been sufficiently accounted for
    in the Record of Decision, and that MAA officials had been involved in the environmental
    review process. The letter also attributed the noise impacts to a construction project that
    the FAA had completed in December, as well as to certain aspects of the TERPZ-5
    procedure that it claimed had been remedied by the recent implementation of TERPZ-6.
    The MAA replied to the FAA’s letter on April 25, 2016, asserting that the MAA’s
    concerns about noise impacts had nothing to do with construction and that TERPZ-6 did
    little to mitigate them. The MAA reiterated its belief that the noise impacts of the departure
    procedures had been insufficiently vetted and that they violated long-established noise
    abatement protocols. By way of relief, the MAA requested that the FAA “restore” the
    departure procedures formerly in place. When the FAA again failed to promptly respond,
    the MAA sought help from Maryland’s then U.S. Senators, who sent the FAA a letter
    echoing the MAA’s concerns on May 19, 2016.
    Howard County finally got involved on May 24, 2016 (110 days after the TERPZ-
    6 procedure had gone into effect), when three of its elected officials sent the FAA a letter
    of their own. The letter represented the officials as “part of a coordinated effort” to engage
    the FAA about “unacceptable noise levels from flights departing from and arriving at BWI”
    as a result of “the implementation of NextGen,” which their “state and federal elected
    counterparts” had been carrying on, “to no avail,” for “nearly a year.” J.A. 1210. Without
    8
    identifying TERPZ-6 or any other specific NextGen procedure, the officials expressed
    frustration with the FAA’s apparent inattention to the “significant disruption” caused by
    the noise impacts, J.A. 1210, and requested “immediate action” in the form of a meeting in
    early June, J.A. 1211. The FAA didn’t follow up about this request.
    In fact, it was not until August that the FAA responded to the concerns from the
    various federal, state, and local officials about noise impacts associated with the
    implementation of NextGen at BWI. That was a month after the FAA received a second
    letter from Maryland’s then U.S. Senators, this time stamped “URGENT,” expressing
    “grave concerns” about the noise impacts “visited upon many Maryland communities since
    NextGen was implemented,” as well as the FAA’s apparent “unwillingness to take [them]
    seriously.” J.A. 1317. The Senators demanded that the FAA “immediately review and
    respond to” the MAA’s request to restore the previous procedures. Id.
    The FAA at last held an initial conference call with the MAA on August 18, 2016,
    followed by another on August 30. The agencies then met on September 12 to discuss the
    noise impacts associated with a variety of NextGen departure procedures in effect at BWI.
    After that, the agencies co-sponsored a “Community Outreach Open House” on October
    27, J.A. 1327, which was attended by nearly 500 residents of the communities surrounding
    BWI, who submitted over 200 comment forms voicing their frustration with the noise
    brought by westbound departing aircraft. The open house prompted the FAA to formally
    contemplate replacing TERPZ-6 and the other departure procedures responsible for the
    noise impacts, which it hoped it could accomplish within two years.
    9
    On December 12, 2016, the FAA wrote to Maryland’s then U.S. Senators about its
    recent meetings with the MAA and the community and its willingness to pursue appropriate
    amendments. But since the noise impacts affected several interrelated procedures and
    communities, and since aircraft noise could only be “relocated” to another part of the
    “densely populated” region of our nation’s capital, the FAA proposed to establish a
    community roundtable to help identify solutions representing a consensus view. See
    Maryland v. Fed. Aviation Admin., 
    952 F.3d 288
    , 289 (D.C. Cir. 2020) (discussing a similar
    proposal in response to similar noise problems at Ronald Reagan Washington National
    Airport). The Senators approved, and the so-called “D.C. Metroplex BWI Community
    Roundtable” was swiftly established. Among other government officials, the FAA invited
    two representatives from Howard County to participate.
    From March 2017 until July 2018, the BWI Roundtable met every month except for
    one. The meetings largely reflected a tug-of-war between the collective members of the
    BWI community, who wanted the FAA to revert wholesale to the departure procedures in
    place “prior to [the] implementation of NextGen,” J.A. 1364, and the FAA, which insisted
    that such reversion was impossible because Congress, after all, had commanded it to
    implement NextGen, whose policy objectives couldn’t be accomplished by using the old
    procedures. Slowly but surely, the FAA advanced its more modest agenda of amending
    the problematic NextGen procedures so as to abate the noise impacts, and ultimately
    presented proposals to that effect at the BWI Roundtable’s meeting of April 24, 2018. In
    response, the community reluctantly tasked the MAA with providing a recommendation.
    10
    In lieu of providing a recommendation on the FAA’s proposed amendments, on June
    26, 2018, the State of Maryland sent the FAA a document that it characterized as an
    “administrative petition for supplemental environmental assessment and revisions to area
    navigation routes and procedures serving the [BWI] airport.” J.A. 2108. The State’s
    administrative petition asserted that the BWI Roundtable had failed to yield any “concrete
    action” to reduce the noise impacts associated with the implementation of the D.C.
    Metroplex at BWI and requested that the FAA prepare a supplemental environmental
    assessment “in light of [these] unanticipated and undisclosed impacts.” J.A. 2109. 1
    Sensing that the FAA’s proposed amendments wouldn’t achieve the relief it sought,
    Howard County sent the FAA its own self-styled “Administrative Petition for Action” on
    July 18, 2018. J.A. 2123. Still without identifying the TERPZ-6 procedure by name, the
    County’s administrative petition asserted that the FAA’s “New Routes” were arbitrary and
    capricious and requested the agency to “immediately suspend[]” their use and revert to its
    “historical[]” departure paths. J.A. 2137. The County also requested a written response
    from the FAA by August 20, 2018, but didn’t receive one until September 18, 2018, in the
    1
    The State of Maryland also sued the FAA in the D.C. Circuit on June 26, 2018,
    though that case, as noted, involved NextGen procedures at Ronald Reagan Washington
    National Airport rather than BWI. See Maryland, 952 F.3d at 289 (dismissing the petition
    as untimely). With respect to the procedures at BWI, the State ultimately filed a separate
    petition in November, after the FAA rejected its administrative petition. See Maryland v.
    Dickson, No. 18-1302 (D.C. Cir. filed Nov. 8, 2018). The D.C. Circuit has since held that
    case in abeyance pending the FAA’s voluntary reconsideration of the State’s requests.
    11
    form of a dismissive one-page letter. The County filed this petition for judicial review
    thereafter, on November 13, 2018, asserting injuries on behalf of itself and its residents. 2
    II.
    Howard County asks us to vacate or set aside the TERPZ-6 departure procedure as
    arbitrary and capricious “or otherwise not in accordance with law” under the
    Administrative Procedure Act (“APA”), see 
    5 U.S.C. § 706
    (2)(A), on the ground that the
    FAA failed to properly assess the procedure’s likely environmental impacts, especially
    with respect to noise. The County also argues that TERPZ-6 is a substantive rule that was
    required to undergo notice-and-comment procedures under the APA, see 
    id.
     § 553.
    As an initial matter, however, we “must first determine” whether the County’s
    petition for review is timely under 
    49 U.S.C. § 46110
    (a). See City of Phoenix, 869 F.3d at
    968. The FAA argues that the petition isn’t timely because it was filed well over sixty days
    after the issuance of its order implementing the TERPZ-6 procedure, and the County’s
    failure to file within sixty days isn’t excused. We agree.
    2
    Shortly after this case was submitted on the briefs, the FAA filed a letter stating
    that, on March 26, 2020, the agency published a clerical amendment to the TERPZ
    procedure, called TERPZ-7, introducing several notational changes to TERPZ-6. The FAA
    also stated its view, with which we agree, that the issuance of TERPZ-7 doesn’t affect the
    legal issues in this case because the amended procedure continues to rely on the same flight
    routes established in TERPZ-6.
    The County didn’t respond to the FAA’s filing, but did file a fresh petition for
    judicial review of TERPZ-7 in this court shortly thereafter. See Howard Cty. v. Fed.
    Aviation Admin., No. 20-1585 (4th Cir. filed May 26, 2020). We have since granted the
    parties’ joint motion to hold that case in abeyance pending our decision here. In so
    proceeding, we express no opinion on the County’s new petition.
    12
    As we recently observed in an unrelated case between these parties, a person
    disclosing “a substantial interest” in an order by the FAA may file a petition for review
    thereof in an appropriate federal circuit court under 
    49 U.S.C. § 46110
    (a). Howard Cty. v.
    Fed. Aviation Admin., --- F. App’x ----, No. 19-1062, 
    2020 WL 3571784
    , at *2 (4th Cir.
    July 1, 2020) (per curiam) (cleaned up). But such petitions “must be filed not later than 60
    days after the order is issued.” 
    49 U.S.C. § 46110
    (a). If more than sixty days have passed
    since the issuance of the FAA’s relevant order, the petition may be taken up “only if there
    are reasonable grounds for not filing by the 60th day.” Id.; accord Citizens Ass’n of
    Georgetown, 896 F.3d at 427 (“Federal law requires that petitions seeking review of FAA
    actions be filed within sixty days of the agency’s final order unless the petitioner had
    reasonable grounds for delay.” (quoting 
    49 U.S.C. § 46110
    (a)).
    Accordingly, the first step in our timeliness inquiry is to determine when the FAA’s
    relevant order issued. Howard Cty., 
    2020 WL 3571784
    , at *2. If the County’s petition
    wasn’t filed within sixty days thereof, we must then consider whether the County had
    “reasonable grounds” for delay. 
    Id.
     We take these steps in turn.
    A.
    The first step requires us to identify the FAA’s relevant order as well as the date on
    which it issued. Like the D.C. Circuit, we understand § 46110(a)’s reference to an FAA
    “order” to refer to a final order within the meaning of the APA, see City of Phoenix, 869
    F.3d at 968; Citizens Ass’n of Georgetown, 896 F.3d at 431, which provides that only “final
    agency action” is “subject to judicial review,” see 
    5 U.S.C. § 704
    ; cf. 
    id.
     § 551(6) (defining
    an “order” as an agency’s “final disposition . . . in a matter other than rule making”). The
    13
    Supreme Court has held that “two conditions must be satisfied” for agency action to be
    “final” within the meaning of 
    5 U.S.C. § 704
    . Bennett v. Spear, 
    520 U.S. 154
    , 177 (1997).
    “First, the action must mark the consummation of the agency’s decisionmaking process.”
    
    Id.
     at 177–78 (cleaned up). “And second, the action must be one by which rights or
    obligations have been determined, or from which legal consequences will flow.” 
    Id. at 178
    (cleaned up).
    As for the term “issue” under § 46110(a), we find persuasive our prior (unpublished)
    interpretation thereof to mean “the act of publishing or officially giving out or making
    available.” See Skydive Myrtle Beach Inc. v. Horry Cty. Dep’t of Airports, 735 F. App’x
    810, 813 (4th Cir. 2018) (per curiam) (quoting Issue, Merriam-Webster’s Collegiate
    Dictionary (10th ed. 1999)). Our sister circuits have understood this term in the same way.
    See, e.g., Avia Dynamics, Inc. v. Fed. Aviation Admin., 
    641 F.3d 515
    , 519 (D.C. Cir. 2011);
    Fla. Manufactured Hous. Ass’n, Inc. v. Cisneros, 
    53 F.3d 1565
    , 1574 (11th Cir. 1995).
    Thus, if the “order” is the final action by which the FAA consummates a decisionmaking
    process and determines rights, obligations, or legal consequences, that order “issues” when
    the FAA publishes or otherwise officially makes it available to interested persons.
    As applied here, we find that the only challenged FAA action that constitutes a final
    order issued on February 4, 2016, when TERPZ-6 was simultaneously “published and put
    into effect.” See City of Phoenix, 869 F.3d at 969 (drawing the same conclusion with
    respect to similar air-traffic procedures at Phoenix Sky Harbor International Airport).
    By putting TERPZ-6 into effect at BWI, the order published on that day “satisfies
    both prongs of the finality test.” See id. First, the order consummated the FAA’s
    14
    decisionmaking process concerning how to modify the previous departure procedure
    (TERPZ-5) for westbound aircraft at BWI, which began in fall 2015 and involved
    “extensive testing and evaluation” before the modifications were finalized. See id. Second,
    it produced the legal consequences that the County now seeks to vacate: It required
    westbound departing aircraft to follow the prescribed flight paths, thereby producing the
    “increased noise” of which the County complains. See id. Furthermore, because the FAA’s
    final order was officially made available to the public on the same day that it went into
    effect, it also issued on that day. Therefore, the County’s sixty-day statute of limitations
    for challenging TERPZ-6 under § 46110(a) began to run on February 4, 2016.
    The County’s contrary contention that the sixty-day clock didn’t begin to tick until
    September 18, 2018, when the FAA rejected its “administrative petition for action,” is
    unavailing because the FAA’s letter of September 18 isn’t a final action. While the FAA’s
    letter did effectively terminate the agency’s decisionmaking process with respect to its
    response to the County’s grievances, it neither produced any legal consequences nor
    determined any rights or obligations. To the contrary, because (as the FAA pointed out)
    the County’s petition wasn’t rooted in any legal right, the FAA’s rejection of it left the
    County in the same legal position it had occupied beforehand. The FAA’s letter of
    September 18 thus fails on Bennett’s second prong. See id. (rejecting the City of Phoenix’s
    argument that an analogous FAA letter was a reviewable final order). 3
    3
    The same conclusion also goes for the other three purported FAA actions that the
    County asks us to vacate or set aside, namely: (1) the FAA’s purported abandonment of
    the BWI Roundtable; (2) the FAA’s purported rescission of two noise abatement programs
    15
    The County’s separate view that the sixty-day clock restarted on September 18,
    2018 is equally mistaken. While courts have recognized a “general rule” whereby a party
    may obtain judicial review of an agency regulation “once the limitations period has run”
    by petitioning the agency to amend or rescind the regulations and then appealing the
    agency’s decision, the “twist” is that this rule doesn’t apply where the request “is predicated
    on an alleged procedural defect in the promulgation of the existing” regulation. Am. Rd.
    & Transp. Builders Ass’n v. EPA, 
    588 F.3d 1109
    , 1112 (D.C. Cir. 2009) (cleaned up). In
    that scenario, the petition must be viewed “as a direct challenge to the original enactment—
    which will be time-barred if it falls outside the period in which judicial review of the
    promulgation is permitted.” Id.; cf. NLRB Union v. Fed. Labor Relations Auth., 
    834 F.2d 191
    , 196 (D.C. Cir. 1987) (contrasting procedural and substantive infirmities for purposes
    of this general rule). Thus, because the County’s administrative petition alleges only
    procedural defects in the FAA’s promulgation of TERPZ-6—namely, that the FAA failed
    to take the proper steps to vet the procedure’s likely noise impacts—the FAA’s rejection
    of it didn’t provide a fresh avenue to judicial review.
    Finally, the County suggests that its petition is timely under the six-year limitations
    period for claims “against the United States” under 
    28 U.S.C. § 2401
    (a). We reject that
    in effect at BWI; and (3) the FAA’s purported abandonment of vectoring. Even assuming
    these actions truly occurred (which the FAA contests), none constitutes final agency action
    under (at least) Bennett’s second prong because, like the FAA’s letter of September 18,
    2018, none left the County in a different legal position than that which it occupied
    following the implementation of TERPZ-6. We likewise don’t address the FAA’s
    challenged inaction after receiving the MAA’s letter of October 22, 2015 because the
    County fails to explain what action the FAA “unlawfully withheld or unreasonably
    delayed.” See 
    5 U.S.C. § 706
    (1).
    16
    argument as well.      Whereas that six-year limitations period “applies generally” to
    challenges brought directly under the APA, which lacks its own limitations period, Sierra
    Club v. U.S. Dep’t of the Interior, 
    899 F.3d 260
    , 267 (4th Cir. 2018), it doesn’t apply to
    challenges brought under a statute that does provide its own limitations period, see Jersey
    Heights Neighborhood Ass’n v. Glendening, 
    174 F.3d 180
    , 187 (4th Cir. 1999). Thus,
    because the County brought its petition under § 46110(a), which specifies a sixty-day
    limitations period for orders by the FAA, the catchall provision of 
    28 U.S.C. § 2401
    (a)
    doesn’t govern the timeliness of the County’s petition.
    Accordingly, because the County filed its petition some 950 days after the FAA
    issued the only final order challenged therein, the petition must be dismissed “unless [the
    County] had ‘reasonable grounds’ for delay.” Citizens Ass’n of Georgetown, 896 F.3d at
    427 (quoting 
    49 U.S.C. § 46110
    (a)). We turn now to consider that issue.
    B.
    Besides our recent decision involving these parties, we “have not previously opined
    on what constitutes reasonable grounds for delay” under § 46110(a). Howard Cty., 
    2020 WL 3571784
    , at *2. Courts that have, however, have construed the exception narrowly,
    “rarely” finding reasonable grounds. See City of Phoenix, 869 F.3d at 969 (cleaned up).
    Indeed, our sister circuits have generally found reasonable grounds for delay only
    where, within sixty days of issuing its final order, the FAA left the parties “with the
    impression that it would address their concerns by replacing its original order with a revised
    one,” id. at 970 (cleaned up); or otherwise “created confusion” about the finality of its
    order, Tulsa Airports Improvement Trust v. Fed. Aviation Admin., 
    839 F.3d 945
    , 950 (10th
    17
    Cir. 2016); see also Safe Extensions, Inc. v. Fed. Aviation Admin., 
    509 F.3d 593
    , 603 (D.C.
    Cir. 2007) (FAA explicitly directed the petitioner to ignore its final order and stated that it
    was going to issue a new draft order); Paralyzed Veterans of Am. v. Civil Aeronautics Bd.,
    
    752 F.2d 694
    , 705 n.82 (D.C. Cir. 1985) (FAA explicitly left its rulemaking docket open
    to receive additional comments from the public), rev’d on other grounds by Dep’t of
    Transp. v. Paralyzed Veterans of Am., 
    477 U.S. 597
     (1986). In cases where the petitioner
    “is primarily to blame for the delay, however,” courts have generally “refused” to find
    reasonable grounds, even where the delay resulted from “a petitioner’s honest and
    understandable mistake.” Howard Cty., 
    2020 WL 3571784
    , at *3 (collecting cases).
    Here, the County rests its argument on City of Phoenix, one of the rare cases in
    which a court has excused a tardy petition under § 46110(a). In that case, the D.C. Circuit
    found reasonable grounds for delay where, after publishing the contested flight routes on
    September 18, 2014, the FAA
    repeatedly communicated—in an October public meeting, in a November
    letter, in a December public meeting, in a January letter, in a February
    decision to reconvene the Working Group, in an April letter, and in a May
    meeting with city officials—that the agency was looking into the noise
    problem, was open to fixing the issue, and wanted to work with the City and
    others to find a solution.
    869 F.3d at 970. The court reasoned that such a pattern of “serial promises” to find a
    solution “would certainly have led reasonable observers to think the FAA might fix the
    noise problem without being forced to do so by a court.” Id. And because petitioning for
    review might well “have shut down dialogue between the petitioners and the agency,” the
    18
    court found it reasonable to treat litigation “as a last rather than a first resort when an
    agency behaves as the FAA did” there. Id.
    This case “is quite different” than City of Phoenix. See Maryland, 952 F.3d at 292
    (reaching the same conclusion with respect to Maryland’s petition for review of procedures
    at Ronald Reagan Washington National Airport). As in Maryland, the missing ingredient
    in this case is “continuous . . . engagement” between the County and the FAA, see id.,
    especially within § 46110(a)’s sixty-day statute of limitations. Notably, whereas the City
    of Phoenix reached out to the FAA about noise complaints within two weeks of the
    implementation of the challenged routes and held a promising meeting together within a
    month, here the County waited 110 days—nearly twice as long as the limitations period—
    before it so much as voiced its concerns to the FAA. The County articulates no grounds,
    let alone reasonable grounds, for waiting so long to take this initial step in seeking
    administrative relief, and the record furnishes none.
    To make matters worse, Howard County continued to wait around after the FAA
    failed to respond to its letter of May 26, and ignored requests for a prompt meeting. In
    fact, the record reflects that the first time these parties had a productive conversation about
    the County’s noise concerns wasn’t until the FAA invited the County, several more months
    later, to participate in the BWI Roundtable that it had established.
    Similarly, on the flip side of the engagement coin, it wasn’t until six months after
    the implementation of TERPZ-6, in August 2016, that the FAA suggested it would
    voluntarily address the collective concerns of the County, the MAA, and Maryland’s then
    Congressional delegation. Whereas in City of Phoenix the FAA promised to address the
    19
    City’s concerns within a month of its final order, here the agency went months without
    meaningfully responding to any of the noise complaints that it had received since October
    2015. As the County’s letter of May 24 itself noted, the efforts of its state and federal
    counterparts to engage the FAA had been going on “to no avail” for the better part of a
    year by the time the County got involved, J.A. 1210, and the FAA remained unresponsive
    for over two more months thereafter. Thus, even if the FAA did eventually respond in a
    manner similar to City of Phoenix, the County couldn’t “wait indefinitely for an
    unresponsive agency,” without regard to § 46110(a)’s fleeting review period, in the hope
    that the FAA would soon change its tune. See Maryland, 952 F.3d at 292.
    In sum, the County’s belated effort to engage the FAA in a voluntary fix to the noise
    impacts associated with TERPZ-6, together with the FAA’s belated offer to pursue such a
    fix, provides no grounds “for not filing by the 60th day.” 
    49 U.S.C. § 46110
    (a).
    *      *      *
    Though we hold that the County’s petition is untimely, we note that, as in a string
    of recent cases, the FAA’s regulatory efforts in this case “were hardly a model of sound
    agency practice.” Maryland, 952 F.3d at 292 (quoting Citizens Ass’n of Georgetown, 896
    F.3d at 436); see also City of Phoenix, 869 F.3d at 970–75. We also recognize that the
    sixty-day window Congress has prescribed for judicial review of FAA action “is admittedly
    short,” and reiterate that it serves as “a shield, not a sword.” Maryland, 952 F.3d at 292.
    Because it serves that former purpose here, the petition for review is
    20
    DISMISSED. 4
    4
    We dispense with oral argument because the facts and legal contentions are
    adequately presented in the materials before us, and argument would not aid in the
    decisional process.
    21