2024-19-06: Ice/Rain Protection System

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 adding the following new airworthiness directive: 2024-19-06 The Boeing Company: Amendment 39-22848; Docket No. FAA-2024-0229; Project Identifier AD-2023-00485-T. (a) Effective Date This airworthiness directive (AD) is effective November 26, 2024. (b) Affected ADs None. (c) Applicability This AD applies to The Boeing Company Model 737-8 and 737-9 airplanes, certificated in any category, having a line number identified in paragraph 1.A., "Effectivity," of Boeing Alert Requirements Bulletin 737-30A1083 RB, dated November 18, 2022. (d) Subject Air Transport Association (ATA) of America Code 30, Ice/Rain Protection System. (e) Unsafe Condition This AD was prompted by a Boeing review of the standby power system control unit (SPCU) design that determined a potential single point of failure exists in the SPCU. The FAA is issuing this AD to address a potential single point of failure in the SPCU, which can result in a non-latent loss of the entire battery bus and consequent un-annunciated loss of control and indication of both engine anti-ice (EAI) systems. The unsafe condition, if not addressed, could result in loss of thrust on both engines due to damage from operation in icing conditions without EAI and can result in loss of continued safe flight and landing. (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 737-30A1083 RB, dated November 18, 2022, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 737-30A1083 RB, dated November 18, 2022. Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 737-30A1083, dated November 18, 2022, which is referred to in Boeing Alert Requirements Bulletin 737-30A1083 RB, dated November 18, 2022. (h) Exceptions to Service Information Specifications (1) Where the Compliance Time columns of the table in the "Compliance" paragraph of Boeing Alert Requirements Bulletin 737-30A1083 RB, dated November 18, 2022, uses the phrase "the original issue date of Requirements Bulletin 737-30A1083 RB," this AD requires using the effective date of this AD. (2) Where "ACTION 3" in the Action column of the table in the "Compliance" paragraph of Boeing Alert Requirements Bulletin 737-30A1083 RB, dated November 18, 2022, specifies to do applicable corrective actions and repeat the test until the test passes if any test fails, for this AD, the compliance time for those actions is before further flight after accomplishing the test. (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 AIR-520, Continued Operational Safety Branch, send it to the attention of the person identified in paragraph (j)(1) 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 (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. (j) Related Information (1) For more information about this AD, contact Raja Vengadasalam, Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; telephone 206-231-3537; email [email protected]. (2) Material identified in this AD that is not incorporated by reference is available at the addresses specified in paragraph (k)(3) of this AD. (k) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference (IBR) 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 737-30A1083 RB, dated November 18, 2022. (ii) [Reserved] (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-locations.html or email [email protected]. Issued on September 13, 2024. Peter A. White, Deputy Director, Integrated Certificate Management Division, Aircraft Certification Service. [FR Doc. 2024-24369 Filed 10-21-24; 8:45 am]BILLING CODE 4910-13-P