2025-02-07: Navigation

1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. 2. The FAA amends § 39.13 by: a. Removing Airworthiness Directive (AD) 2020-03-20, Amendment 39-19844 (85 FR 8717, February 18, 2020); and b. Adding the following new AD: 2025-02-07 The Boeing Company: Amendment 39-22940; Docket No. FAA-2023-1993; Project Identifier AD-2023-00129-T. (a) Effective Date This airworthiness directive (AD) is effective March 17, 2025. (b) Affected ADs This AD replaces AD 2020-03-20, Amendment 39-19844 (85 FR 8717, February 18, 2020) (AD 2020-03-20). (c) Applicability This AD applies to The Boeing Company airplanes, certificated in any category, as identified in paragraphs (c)(1) through (9) of this AD, on which Collins GLU-2100 MMR, P/N 822-2532-100, with a software version earlier than COL4C-0087-0003 is installed. (1) Model MD-11 and MD-11F airplanes modified by supplemental type certificate (STC) ST01895WI. (2) Model 717-200 airplanes modified by STC ST04416AT. (3) All Model 737-8 and 737-9 airplanes. (4) All Model 737-600, -700, -700C, -800, -900, and -900ER series airplanes. (5) Model 747-400 and 747-400F series airplanes modified by STC ST01892WI. (6) Model 757-200, -200PF, -200CB, and -300 series airplanes modified by STC ST04436AT. (7) Model 767-200, -300, -300F, and -400ER series airplanes modified by STC ST04436AT or ST01883WI. (8) All Model 777-200, -200LR, -300, and -300ER series airplanes. (9) All Model 777F series airplanes. (d) Subject Air Transport Association (ATA) of America Code 34, Navigation. (e) Unsafe Condition This AD was prompted by reports of the loss of global positioning system (GPS) data or degraded GPS positional accuracy and additional reports of an error in calculating Coordinated Universal Time (UTC) while using a certain multi-mode receiver (MMR) with certain software installed. The FAA is issuing this AD to address loss of GPS data and degraded GPS positional accuracy, which, during a high-precision approach with this GPS error, could result in controlled flight into terrain, and to address UTC calculation errors that could result in simultaneous MMR resets on multiple airplanes, increased air traffic control workload, and consequent reduction in airplane separation and potential for mid-air collision. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Retained Airplane Flight Manual (AFM) Revision, With No Changes This paragraph restates the requirements of paragraph (g) of AD 2020-03-20, with no changes. For airplanes equipped with Collins GLU-2100 MMR, part number (P/N) 822-2532-100, having any applicable GLU-2100 operational software (OPS) identified in figure 1 to paragraph (g) of this AD installed: At the applicable time specified in paragraphs (g)(1) and (2) of this AD, revise the limitations or certificate limitations section, as applicable, of the existing AFM to include the information specified in figure 2 to paragraph (g) of this AD and revise the procedures or normal procedures section, as applicable, of the existing AFM to include the information specified in figure 3 to paragraph (g) of this AD. This may be done by inserting a copy of figures 2 and 3 to paragraph (g) of this AD into the existing AFM. (1) For Model 737-8 and 737-9 airplanes: Before further flight. (2) For all airplanes except Model 737-8 and 737-9 airplanes: Within 7 days after February 18, 2020 (the effective date of AD 2020-03-20). BILLING CODE 4910-13-P Figure 1 to Paragraph (g)-Affected OPS Software ER10FE25.000 Figure 2 to Paragraph (g)-AFM-Limitations or Certificate Limitations ER10FE25.001 Figure 2 to Paragraph (g)-AFM-Limitations or Certificate Limitations Continued ER10FE25.002 Figure 3 to Paragraph (g)-AFM-Procedures or Normal Procedures ER10FE25.003 BILLING CODE 4910-13-C (h) Software Installation for Certain Airplanes For airplanes identified in paragraphs (h)(1) through (7) of this AD with Collins GLU-2100 MMR, part number (P/N) 822-2532-100, having any applicable GLU-2100 operational software (OPS): Within 12 months after the effective date of this AD, install MMR OPS P/N COL4C-0087-0003, or later-approved software version, and do a software configuration check to confirm that P/N COL4C-0087-0003 or later-approved software version is installed. Both the installation and the check must be done in accordance with a method approved by the Manager, AIR-520, Continued Operational Safety Branch, FAA. Later-approved software versions are those Boeing or Collins software versions that are approved as a replacement for MMR OPS P/N COL4C-0087-0003 and are approved as part of the type design by the FAA or by The Boeing Company Organization Designation Authorization (ODA). (1) Model MD-11 and MD-11F airplanes modified by STC ST01895WI. (2) Model 717-200 airplanes modified by STC ST04416AT. (3) Model 737-600, -700, -700C, -800, -900, and -900ER series airplanes modified by STC ST04436AT. (4) Model 747-400 and 747-400F series airplanes modified by STC ST01892WI. (5) Model 757-200, -200PF, -200CB, and -300 series airplanes modified by STC ST04436AT. (6) Model 767-200, -300, -300F, and -400ER series airplanes modified by STC ST04436AT or ST01883WI. (7) Model 777-200, -200LR, and -300 series airplanes. (i) Software Installation for Certain Other Airplanes For Model 737-8 and -9 airplanes, Model 737-900ER series airplanes, and Model 777-300ER and 777F series airplanes equipped with Collins GLU-2100 MMR, part number (P/N) 822-2532-100, having any applicable GLU-2100 operational software (OPS): Within 12 months after the effective date of this AD, except as specified in paragraph (j) of this AD, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of the applicable requirements bulletin identified in paragraphs (i)(1) through (3) of this AD. (1) For Model 737-8 and -9 airplanes: Boeing Alert Requirements Bulletin 737-34A3572 RB, dated October 15, 2020. Note 1 to paragraph (i)(1): Guidance for accomplishing the actions required by paragraph (i)(1) of this AD can be found in Boeing Alert Service Bulletin 737-34A3572, dated October 15, 2020, which is referred to in Boeing Alert Requirements Bulletin 737-34A3572 RB, dated October 15, 2020. (2) For Model 737-900ER series airplanes: Boeing Alert Requirements Bulletin 737-34A3573 RB, dated August 5, 2020. Note 2 to paragraph (i)(2): Guidance for accomplishing the actions required by paragraph (i)(2) of this AD can be found in Boeing Alert Service Bulletin 737-34A3573, dated August 5, 2020, which is referred to in Boeing Alert Requirements Bulletin 737-34A3573 RB, dated August 5, 2020. (3) For Model 777-300ER and 777F series airplanes: Boeing Alert Requirements Bulletin 777-34A0385 RB, Revision 1, dated March 8, 2021. Note 3 to paragraph (i)(3): Guidance for accomplishing the actions required by paragraph (i)(3) of this AD can be found in Boeing Alert Service Bulletin 777-34A0385, Revision 1, dated March 8, 2021, which is referred to in Boeing Alert Requirements Bulletin 777-34A0385 RB, Revision 1, dated March 8, 2021. (j) Exceptions to Service Information Specifications Where the requirements bulletins identified in paragraphs (i)(1) through (3) of this AD specify installing MMR option selection software (OSS) P/N BCG27-U000-0730 or BCG48-U000-05W9 and doing the associated software configuration check, this AD does not require those actions. (k) Terminating Action After accomplishing the actions required by paragraph (h) or (i) of this AD, as applicable, you may remove the AFM revision required by paragraph (g) of this AD. (l) Credit for Previous Actions This paragraph provides credit for the actions required by paragraph (i)(3) of this AD, if the actions were performed before the effective date of this AD using Boeing Alert Requirements Bulletin 777-34A0385 RB, dated August 7, 2020. (m) Alternative Methods of Compliance (AMOCs) (1) The Manager, AIR-520, Continued Operational Safety Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or responsible Flight Standards Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph (n)(1) of this AD. Information may be emailed to: AMOC@faa.gov. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office. (3) An AMOC that provides an acceptable level of safety may be used for any repair, modification, or alteration required by this AD if it is approved by The Boeing Company ODA that has been authorized by the Manager, AIR-520, Continued Operational Safety Branch, FAA, to make those findings. To be approved, the repair method, modification deviation, or alteration deviation must meet the certification basis of the airplane, and the approval must specifically refer to this AD. (4) AMOCs approved for AD 2020-03-20 are approved as AMOCs for the corresponding provisions of this AD. (n) Related Information (1) For more information about this AD, contact Douglas Tsuji, Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; phone: 206-231-3548; Douglas.Tsuji@faa.gov. (2) Material identified in this AD that is not incorporated by reference is available at the addresses specified in paragraph (o)(3) of this AD. (o) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference of the material listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this material as applicable to do the actions required by this AD, unless the AD specifies otherwise. (i) Boeing Alert Requirements Bulletin 737-34A3572 RB, dated October 15, 2020. (ii) Boeing Alert Requirements Bulletin 737-34A3573 RB, dated August 5, 2020. (iii) Boeing Alert Requirements Bulletin 777-34A0385 RB, Revision 1, dated March 8, 2021. (3) For Boeing material identified in this AD, contact Boeing Commercial Airplanes, Attention: Contractual & Data Services (C&DS), 2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA 90740-5600; telephone 562-797-1717; website myboeingfleet.com. (4) You may view this material at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206-231-3195. (5) You may view this material at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locationsoremailfr.inspection@nara.gov. Issued on January 16, 2025. Suzanne Masterson, Deputy Director, Integrated Certificate Management Division, Aircraft Certification Service. [FR Doc. 2025-02376 Filed 2-7-25; 8:45 am]BILLING CODE 4910-13-P