2024-10-15: Powerplant

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: 2024-10-15 Gulfstream Aerospace Corporation: Amendment 39-22761; Docket No. FAA-2024-1476; Project Identifier AD-2024-00090-T. (a) Effective Date This airworthiness directive (AD) is effective June 7, 2024. (b) Affected ADs None. (c) Applicability This AD applies to Gulfstream Aerospace Corporation airplanes, certificated in any category, identified in paragraphs (c)(1) and (2) of this AD. (1) Model GVII-G500 airplanes, serial numbers (S/Ns) 72001 through 72140 inclusive. (2) Model GVII-G600 airplanes, S/Ns 73001 through 73148 inclusive. (d) Subject Air Transport Association (ATA) of America Code 71, Powerplant. (e) Unsafe Condition This AD was prompted by a report of a failed rear engine mount discovered during a preflight walk-around due to visible engine misalignment. The FAA is issuing this AD to address failure of any single engine mount. The unsafe condition, if not addressed, could result in the separation of an engine from the airplane and subsequent loss of control of the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Inspection of Engine Mount Hardware Installations Within 30 days after the effective date of this AD, do all applicable actions identified as "RC" (required for compliance) in, and in accordance with, the Accomplishment Instructions of the applicable material specified in paragraphs (g)(1) and (2) of this AD. (1) Gulfstream GVII-G500 Customer Bulletin No. 092, Revision A, dated April 9, 2024. (2) Gulfstream GVII-G600 Customer Bulletin No. 063, Revision A, dated April 9, 2024. (h) Revision of Aircraft Maintenance Manual (AMM) Within 30 days after the effective date of this AD, revise the existing AMM to incorporate the procedures specified in paragraphs (h)(1)(i) through (vi) or (h)(2)(i) through (vi) of this AD, as applicable. (1) Chapter 71-Powerplant, Gulfstream Aerospace GVII-G500 AMM, Document Number GAC-AC-GVII-G500-AMM-0001, Revision 18, dated March 29, 2024: (i) 71-20-02 Engine Mount Hardware-Removal/Installation, 71-20 Mounts; (ii) 71-21-03 Engine Forward Link Assemblies-Removal/Installation, 71-21 Front Mounts; (iii) 71-21-04 Forward Engine Mount Assembly-Removal/Installation, 71-21 Front Mounts; (iv) 71-22-03 Aft Engine Mount Strut Assembly-Removal/Installation, 71-22 Rear Mounts; (v) 71-23-05 Engine Thrust Strut-Removal/Installation, 71-23 Mounts: Support Links and Accessories; and (vi) 71-23-06 Engine Alignment Strut-Removal/Installation, 71-23 Mounts: Support Links and Accessories. (2) Chapter 71-Powerplant, Gulfstream Aerospace GVII-G600 AMM, Document Number GAC-AC-GVII-G600-AMM-0001, Revision 14, dated March 29, 2024: (i) 71-20-02 Engine Mount Hardware-Removal/Installation, 71-20 Mounts; (ii) 71-21-03 Engine Forward Link Assemblies-Removal/Installation, 71-21 Front Mounts; (iii) 71-21-04 Forward Engine Mount Assembly-Removal/Installation, 71-21 Front Mounts; (iv) 71-22-03 Aft Engine Mount Strut Assembly-Removal/Installation, 71-22 Rear Mounts; (v) 71-23-05 Engine Thrust Strut-Removal/Installation, 71-23 Mounts: Support Links and Accessories; and (vi) 71-23-06 Engine Alignment Strut-Removal/Installation, 71-23 Mounts: Support Links and Accessories. (i) Credit for Previous Actions This paragraph provides credit for the actions specified in paragraph (g) of this AD, if those actions were performed before the effective date of this AD using the material identified in paragraphs (i)(1) through (4) of this AD, as applicable. (1) Gulfstream GVII-G500 Alert Customer Bulletin No. 001, dated February 7, 2024. (2) Gulfstream GVII-G500 Customer Bulletin No. 092, dated February 15, 2024. (3) Gulfstream GVII-G600 Alert Customer Bulletin No. 001, dated February 7, 2024. (4) Gulfstream GVII-G600 Customer Bulletin No. 063, dated February 15, 2024. (j) Special Flight Permit Special flight permits may be issued in accordance with 14 CFR 21.197 and 21.199 to operate the airplane to a location where the inspection required by this AD can be performed, but special flight permits may not be issued to operate the airplane after a visual inspection has identified any non-conforming engine mount installation. Non-conforming engine mount installations must be repaired before further flight. (k) Alternative Methods of Compliance (AMOCs) (1) The Manager, East Certification 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 (l)(1) of this AD. (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) For service information that contains steps that are labeled as Required for Compliance (RC), the provisions of paragraphs (k)(3)(i) and (ii) of this AD apply. (i) The steps labeled as RC, including substeps under an RC step and any figures identified in an RC step, must be done to comply with the AD. An AMOC is required for any deviations to RC steps, including substeps and identified figures. (ii) Steps not labeled as RC may be deviated from using accepted methods in accordance with the operator's maintenance or inspection program without obtaining approval of an AMOC, provided the RC steps, including substeps and identified figures, can still be done as specified, and the airplane can be put back in an airworthy condition. (I) Related Information (1) For more information about this AD, contact Jeffrey Johnson, Aviation Safety Engineer, FAA, 1701 Columbia Avenue, College Park, GA 30337; phone: 404-474-5554; email: 9-ASO-ATLACO-ADs@faa.gov. (2) Material identified in this AD that is not incorporated by reference is available at the address specified in paragraph (m)(3) of this AD. (m) 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) Gulfstream GVII-G500 Customer Bulletin No. 092, Revision A, dated April 9, 2024. (ii) Gulfstream GVII-G600 Customer Bulletin No. 063, Revision A, dated April 9, 2024. (iii) Chapter 71-Powerplant, Gulfstream Aerospace GVII-G500 Aircraft Maintenance Manual (AMM), Document Number GAC-AC-GVII-G500-AMM-0001, Revision 18, dated March 29, 2024: Note 1 to the introductory text of paragraph (m)(2)(iii): The manufacturer name is located only on the title page of the document. (A) 71-20-02 Engine Mount Hardware-Removal/Installation, 71-20 Mounts; (B) 71-21-03 Engine Forward Link Assemblies-Removal/Installation, 71-21 Front Mounts; (C) 71-21-04 Forward Engine Mount Assembly-Removal/Installation, 71-21 Front Mounts; (D) 71-22-03 Aft Engine Mount Strut Assembly-Removal/Installation, 71-22 Rear Mounts; (E) 71-23-05 Engine Thrust Strut-Removal/Installation, 71-23 Mounts: Support Links and Accessories; and (F) 71-23-06 Engine Alignment Strut-Removal/Installation, 71-23 Mounts: Support Links and Accessories. (iv) Chapter 71-Powerplant, Gulfstream Aerospace GVII-G600 AMM, Document Number GAC-AC-GVII-G600-AMM-0001, Revision 14, dated March 29, 2024: Note 2 to the introductory text of paragraph (m)(2)(iv): The manufacturer name is located only on the title page of the document. (A) 71-20-02 Engine Mount Hardware-Removal/Installation, 71-20 Mounts; (B) 71-21-03 Engine Forward Link Assemblies-Removal/Installation, 71-21 Front Mounts; (C) 71-21-04 Forward Engine Mount Assembly-Removal/Installation, 71-21 Front Mounts; (D) 71-22-03 Aft Engine Mount Strut Assembly-Removal/Installation, 71-22 Rear Mounts; (E) 71-23-05 Engine Thrust Strut-Removal/Installation, 71-23 Mounts: Support Links and Accessories; and (F) 71-23-06 Engine Alignment Strut-Removal/Installation, 71-23 Mounts: Support Links and Accessories. (3) For Gulfstream Aerospace material, contact Gulfstream Aerospace Corporation, Technical Publications Dept., P.O. Box 2206, Savannah, GA 31402-2206; telephone 800-810-4853; email pubs@gulfstream.com; website gulfstream.com/en/customer-support. (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 or email fr.inspection@nara.gov. Issued on May 17, 2024. Victor Wicklund, Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2024-12581 Filed 6-5-24; 11:15 am]BILLING CODE 4910-13-P