Airworthiness directives › 2023-04-19
AD 2023-04-19 Airworthiness Directives; General Electric Company Turbofan Engines
Applicability*9
This AD applies to General Electric Company (GE) GE90-110B1 and GE90-115B model turbofan engines with an installed high-pressure compressor (HPC) rotor stage 7-9 spool with part number (P/N) 2032M23G01, P/N 2032M23G02, P/N 2676M00G01, or P/N 2676M00G02, and a serial number listed in paragraph 4., Appendix—A, Table 1 of GE GE90-100 Service Bulletin (SB) 72-0905 R00, dated July 25, 2022 (GE SB 72-0905).
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) At the next engine shop visit after the effective date of this AD, perform an FPI of the dovetail pressure face of the affected HPC rotor stage 7-9 spool in accordance with the Accomplishment Instructions, paragraph 3.A.(1)(a) of GE SB 72-0905. (2) If, during the FPI required by paragraph (g)(1) of this AD, the HPC rotor stage 7-9 spool does not meet the part serviceability criteria in the Accomplishment Instructions, paragraph 3.A.(1)(a) of GE SB 72-0905, before further flight, replace the compressor rotor stage 7-9 spool with a part eligible for installation.
Unsafe condition
This AD was prompted by a manufacturer investigation which revealed that florescent penetrant inspections (FPI) were not performed on the dovetail pressure face of certain HPC rotor stage 7-9 spools at overhaul. The FAA is issuing this AD to prevent the failure of the HPC rotor stage 7-9 spool. The unsafe condition, if not addressed, could result in an in-flight shutdown, damage to the engine, and damage to the airplane.
Affected ADs
None.
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