Airworthiness directives › 2023-17-08
AD 2023-17-08 Airworthiness Directives; General Electric Company Engines
Models named: GEnx-1B64/P2, GEnx-1B67/P2, GEnx-1B70/75/P2, GEnx-1B70/P2, GEnx-1B70C/P2, GEnx-1B74/75/P2, GEnx-1B76/P2, GEnx-1B76A/P2, GEnx-2B67/P. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to General Electric Company (GE) Model GEnx-1B64/P2, GEnx-1B67/P2, GEnx-1B70/75/P2, GEnx-1B70/P2, GEnx-1B70C/P2, GEnx-1B74/75/P2, GEnx-1B76/P2, GEnx-1B76A/P2, and GEnx-2B67/P engines with an installed: (1) Stages 6-10 compressor rotor spool having a part number (P/N) and serial number (S/N) listed in paragraph 4, Appendix—A, Table 1 of GE GEnx-1B Service Bulletin 72-0515, R00, dated January 31, 2023 (GEnx-1B 72-0515 R00); or (2) Forward seal having a P/N and S/N listed in paragraph 4, Appendix—A, Table 2 of GEnx-1B 72-0515 R00; or (3) Stages 6-10 compressor rotor spool having a P/N and S/N listed in paragraph 4, Appendix—A, Table 1 of GE GEnx-2B Service Bulletin 72-0452, R00, dated January 31, 2023. (GEnx-2B 72-0452 R00); or (4) Forward seal having a P/N and S/N listed in paragraph 4, Appendix—A, Table 2 of GEnx-2B 72-0452 R00.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) For affected Model GEnx-1B engines, at the next piece-part exposure after the effective date of this AD, or before the affected stages 6-10 compressor rotor spool reaches the cyclic removal threshold listed in paragraph 4., Appendix—A, Table 1 of GEnx-1B 72-0515 R00, whichever occurs first, remove the affected stages 6-10 compressor rotor spool from service and replace with a part eligible for installation. (2) For affected Model GEnx-1B engines, at the next piece-part exposure after the effective date of this AD, or before the affected forward seal exceeds the cyclic removal threshold listed in paragraph 4., Appendix—A, Table 2 of GEnx-1B 72-0515 R00, whichever occurs first, remove the affected forward seal from service and replace with a part eligible for installation. (3) For affected Model GEnx-2B engines, at the next piece-part exposure after the effective date of this AD, or before the affected stages 6-10 compressor rotor spool exceeds the cyclic removal threshold listed in paragraph 4., Appendix—A, Table 1 of GEnx-2B 72-0452 R00, whichever occurs first, remove the affected stages 6-10 compressor rotor spool from service and replace with a part eligible for installation. (4) For affected Model GEnx-2B engines, at the next piece-part exposure after the effective date of this AD, or before the affected forward seal exceeds the cyclic removal threshold listed in paragraph 4., Appendix—A, Table 2 of GEnx-2B 72-0452 R00, whichever occurs first, remove the affected forward seal from service and replace with a part eligible for installation.
Unsafe condition
This AD was prompted by a manufacturer investigation that revealed certain stages 6-10 compressor rotor spools and forward seals were subject to iron inclusion introduced during the manufacturing process. The FAA is issuing this AD to prevent fracture and potential uncontained failure of certain stages 6-10 compressor rotor spools and forward seals. The unsafe condition, if not addressed, could result in uncontained debris release, damage to the engine, and damage to the aircraft.
Affected ADs
None.
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