Airworthiness directives › 2022-23-09
AD 2022-23-09 Airworthiness Directives; General Electric Company Turbofan Engines
Applicability*9
This AD applies to General Electric Company GE90-90B, GE90-94B, GE90-110B1, and GE90-115B model turbofan engines with an installed high-pressure turbine (HPT) stage 1 disk, HPT stage 2 disk, or stages 7-9 compressor rotor spool with a part number (P/N) and serial number (S/N) identified in Table 1 to paragraph (c) of this AD. Table 1 to Paragraph ( c )—Affected HPT Stage 1 Disks, HPT Stage 2 Disks, and Stages 7-9 Compressor Rotor Spools Part name P/N S/N HPT stage 1 disk 1847M95G04 GWN0R5K4 HPT stage 2 disk 1711M47G13 TMT5N068 HPT stage 2 disk 1865M14P04 TMT5P744 TMT5P745 TMT5P749 TMT5P755 TMT5P762 Stages 7-9 compressor rotor spool 2032M23G02 GWN0R5M5
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Before exceeding 400 flight cycles after the effective date of this AD, remove the affected HPT stage 1 disk, HPT stage 2 disk, and stages 7-9 compressor rotor spool from service and replace with a part eligible for installation. (2) For affected engines not in service, before further flight, remove the affected HPT stage 1 disk, HPT stage 2 disk, and stages 7-9 compressor rotor spool and replace with a part eligible for installation.
Unsafe condition
This AD was prompted by a manufacturer investigation that revealed that certain HPT stage 1 disks, HPT stage 2 disks, and stages 7-9 compressor rotor spools were manufactured from powder metal material suspected to contain iron inclusion. The FAA is issuing this AD to prevent fracture and potential uncontained failure of certain HPT stage 1 disks, HPT stage 2 disks, and stages 7-9 compressor rotor spools. 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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