Airworthiness Directive · Amendment 39-19347 · Turbine section
General Electric Company Turbofan Engines
Superseded. A later AD replaced this one: AD 2019-02-01. Comply with the one in force.
This AD applies to General Electric Company (GE) GEnx-1B54, -1B58, -1B64, -1B67, -1B70, -1B54/P1, -1B58/P1, -1B64/P1, -1B67/P1, -1B70/P1, -1B54/P2, -1B58/P2, -1B64/P2, -1B67/P2, -1B70/P2, -1B70C/P1, -1B70/72/P1, -1B70/75/P1, -1B74/75/P1, -1B75/P1, -1B70C/P2, -1B70/72/P2, -1B70/75/P2, -1B74/75/P2, -1B75/P2, -1B76/P2, -1B76A/P2, -1B78/P2, -2B67, -2B67B, and -2B67/P turbofan engines with a high-pressure turbine (HPT) stator case (HPT case), part number (P/N) 2302M90G04 installed, and with any serial number (S/N) listed in Table 1, 2, or 3, in the Planning Information section of GE Service Bulletin (SB) GEnx-2B S/B 72-0360, Revision 03, dated June 29, 2018, or GEnx-1B S/B 72-0424, Revision 03, dated June 29, 2018, installed.
We are adopting a new airworthiness directive (AD) for certain General Electric Company (GE) GEnx-1B54, -1B58, -1B64, -1B67, -1B70, - 1B54/P1, -1B58/P1, -1B64/P1, -1B67/ P1, -1B70/P1, -1B54/P2, -1B58/P2, -1B64/P2, -1B67/P2, -1B70/P2, -1B70C/ P1, -1B70/72/P1, -1B70/75/P1, -1B74/75/P1, -1B75/P1, -1B70C/P2, -1B70/ 72/P2, -1B70/75/P2, -1B74/75/P2, -1B75/P2, -1B76/P2, -1B76A/P2, -1B78/ P2, -2B67, -2B67B, and -2B67/P turbofan engines. This AD requires removal of affected high-pressure turbine (HPT) stator cases (HPT cases) from service and their replacement with a part eligible for installation. This AD was prompted by the discovery of a quality escape at a manufacturing facility. We are issuing this AD to address the unsafe condition on these products.
(1) For HPT cases listed in Planning Information, Table 1 or 2, of GE SBs GEnx-2B S/B 72-0360, Revision 03, dated June 29, 2018 and GEnx-1B S/B 72-0424, Revision 03, dated June 29, 2018, determine the lesser of the following: Cycles since new (CSN) or cycles since Class A fluorescent penetrant inspection (CSFPI) of the entire HPT case.
(2) Using the determination made in paragraph (g)(1) of this AD, remove from service the HPT case after the effective date of this AD as specified in Table 1 to paragraph (g) of this AD. Replace the removed HPT case with a part eligible for installation.
(3) Remove from service HPT cases listed in Planning Information, Table 3, of GE SBs GEnx-2B S/B 72-0360, Revision 03, dated June 29, 2018 or GEnx-1B S/B 72-0424, Revision 03, dated June 29, 2018, prior to exceeding 10 cycles after the effective date of this AD or exceeding the CSN limits listed in Table 3, whichever comes later. Replace the removed HPT case with a part eligible for installation.
(1) After the effective date of this AD, do not install any affected HPT case onto any engine.
(2) After the effective date of this AD, HPT cases listed in Planning Information, Table 3, in GE SB GEnx-2B S/B 72-0360, Revision 03, dated June 29, 2018 or GEnx-1B S/B 72-0424, Revision 03, dated June 29, 2018, and any higher level assemblies with these parts installed, may not be removed from a GEnx-2B engine and installed on a GEnx-1B engine or removed from a GEnx-1B engine and installed on a GEnx-2B engine.
