Airworthiness Directive · Amendment 39-21621 · Engine fuel distribution
General Electric Company Turbofan Engines
This AD applies to General Electric Company (GE) GEnx-2B67, GEnx-2B67/P, and GEnx-2B67B model turbofan engines with lower fuel manifold, part number (P/N) 2619M58G01, installed.
The FAA is adopting a new airworthiness directive (AD) for certain General Electric Company (GE) GEnx-2B67, GEnx-2B67/P, and GEnx- 2B67B model turbofan engines. This AD was prompted by a report of a crack in the lower fuel manifold causing fuel leakage. This AD requires an ultrasonic inspection (USI) or a fluorescent penetrant inspection (FPI) of the lower fuel manifold. Depending on the results of the USI or FPI, this AD requires replacement of the lower fuel manifold with a part eligible for installation. The FAA is issuing this AD to address the unsafe condition on these products.
(1) Within the compliance time specified in Table 1 to paragraph (g)(1) of this AD, perform either an ultrasonic inspection (USI), an on-wing spot fluorescent penetrant inspection (FPI), or an in-shop FPI of the lower fuel manifold, P/N 2619M58G01, in accordance with paragraph (g)(1)(i), (ii), or (iii) of this AD, as applicable.
| Lower fuel manifold cycles since new (CSN) | Compliance time |
|---|---|
| Less than 1,700 CSN | After the lower fuel manifold has accumulated 1,700 CSN, but before it exceeds 2,200 CSN. |
| 1,700 CSN or more | Within 500 engine flight cycles (FCs) after the effective date of this AD. |
(i) Perform a USI of the lower fuel manifold at the locations adjacent to the five support block pads to detect cracks in accordance with paragraph 4. Appendix—A of GEnx-2B Service Bulletin (SB) 73-0089 R01, dated January 11, 2021.
(ii) Perform an on-wing spot FPI of the lower fuel manifold at the five brazed block joints to detect cracks. Guidance on performing the spot FPI can be found in paragraph 3.B.(6)(a) of GEnx-2B SB 73-0089 R01, dated January 11, 2021.
(iii) Perform an in-shop FPI of the lower fuel manifold at the five brazed block joints to detect cracks. Guidance on performing the FPI can be found in paragraph 3.C.(4) of GEnx-2B SB 73-0089 R01, dated January 11, 2021.
(2) If a crack or rejectable indication is found during the USI, on-wing spot FPI, or in-shop FPI required by paragraphs (g)(1)(i), (ii), and (iii) of this AD, before further flight, remove the lower fuel manifold from service and replace it with a part eligible for installation.
For the purpose of this AD, a part eligible for installation is:
(1) Any serviceable lower fuel manifold, P/N 2619M58G01, with less than 1,700 CSN, or
(2) Any lower fuel manifold, P/N 2619M58G01, with 1,700 CSN or more that has been inspected in accordance with paragraph (g)(1)(i), (ii), or (iii) of this AD and a crack or rejectable indication was not found, or
(3) Any approved lower fuel manifold with a part number other than P/N 2619M58G01.
The reporting requirements specified in paragraph 4. Appendix—A of GE GEnx-2B SB 73-0089 R01, dated January 11, 2021, are not required by this AD.
