Airworthiness directives › 2021-13-16
AD 2021-13-16 Airworthiness Directives; General Electric Company Turbofan Engines
Applicability*9
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.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(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. Table 1 to Paragraph ( g )(1)—Compliance Time 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.
Unsafe condition
This AD was prompted by a report of a crack in the lower fuel manifold. The FAA is issuing this AD to detect cracking of the lower fuel manifold. The unsafe condition, if not addressed, could result in failure of the fuel manifold, engine fire, and damage to the airplane.
Affected ADs
None.
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