2024-02-03: Instruments

1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive: 2024-02-03 The Boeing Company: Amendment 39-22667; Docket No. FAA-2023-1649; Project Identifier AD-2022-00905-T. (a) Effective Date This airworthiness directive (AD) is effective March 21, 2024. (b) Affected ADs None. (c) Applicability This AD applies to The Boeing Company Model 747-8 and 747-8F series airplanes, certificated in any category, as identified in Boeing Alert Requirements Bulletin 747-31A2544 RB, dated March 31, 2020. (d) Subject Air Transport Association (ATA) of America Code: 31, Instruments. (e) Unsafe Condition This AD was prompted by a report that all six Integrated Display Units (IDUs) became blank when new flight plan data was entered in the Flight Management System, and by a determination that indication of decaying airspeed in certain scenarios is required. The FAA is issuing this AD to address problems with the Electronic Flight Instrumentation System/Engine Indicating and Crew Alerting System (EICAS) Interface Units (EIUs), which control the IDUs. The unsafe condition, if not addressed, could result in loss of all flight deck displays (Primary Flight Display/EICAS/Navigation Display, not including standby displays) combined with potential impact to the autopilot and auto-throttle functionality and lack of crew visibility of any subsequent system failures, which can prevent continued safe flight and landing; it could also result in inadequate alerting of decaying airspeed, unacceptably low airspeed, and loss of control of the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions Except as specified by paragraph (h) of this AD: At the applicable times specified in the "Compliance" paragraph of Boeing Alert Requirements Bulletin 747-31A2544 RB, dated March 31, 2020, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 747-31A2544 RB, dated March 31, 2020. Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 747-31A2544, dated March 31, 2020, which is referred to in Boeing Alert Requirements Bulletin 747-31A2544 RB, dated March 31, 2020. (h) Exceptions to Service Information Specifications (1) Where the Compliance Time column of the table in the "Compliance" paragraph of Boeing Alert Requirements Bulletin 747-31A2544 RB, dated March 31, 2020, uses the phrase "the original issue date of Requirements Bulletin 747-31A2544 RB," this AD requires using "the effective date of this AD." (2) For Group 2 airplanes identified in Boeing Alert Requirements Bulletin 747-31A2544 RB, dated March 31, 2020: The concurrent requirements specified in Action 1 of Table 1 of the Accomplishment Instructions of Boeing Alert Requirements Bulletin 747-31A2544 RB, dated March 31, 2020, do not apply. (i) 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 (j) of this AD. Information may be emailed to: [email protected]. (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 Organization Designation Authorization 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. (j) Related Information For more information about this AD, contact Raja Vengadasalam, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; telephone 206-231-3537; email [email protected]. (k) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. (i) Boeing Alert Requirements Bulletin 747-31A2544 RB, dated March 31, 2020. (ii) [Reserved] (3) For service information identified in this AD, contact Boeing Commercial Airplanes, Attention: Contractual & Data Services, 2600 Westminster Boulevard, MC 110-SK57, Seal Beach, CA 90740-5600; telephone 562-797-1717; website myboeingfleet.com. (4) You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th Street, 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-locations or email [email protected] . Issued on January 26, 2024. Michael Linegang, Acting Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2024-03082 Filed 2-14-24; 8:45 am]BILLING CODE 4910-13-P