Airworthiness Directive 2023-26-07
one-timeAirworthiness Directives; General Electric Company Engines
What this AD requires
The FAA is adopting a new airworthiness directive (AD) for certain General Electric Company (GE) Model GE90-90B, GE90-94B, GE90- 110B1, and GE90-115B engines. This AD was prompted by a manufacturer investigation that revealed certain high-pressure turbine (HPT) stage 1 disks, HPT stage 2 disks, forward HPT rotor seals, interstage HPT seals, and stages 7-9 compressor rotor spools were manufactured from powder metal material suspected to contain iron inclusion. This AD requires replacement of affected HPT stage 1 disks, HPT stage 2 disks, forward HPT rotor seals, interstage HPT seals, and stages 7-9 compressor rotor spools. The FAA is issuing this AD to address the unsafe condition on these products.
Which aircraft AD 2023-26-07 applies to
GE90-90B and GE90-94B engines apply when fitted with interstage HPT seals listed in Table 1 to paragraph (c) of this AD. GE90-110B1 and GE90-115B engines apply when fitted with an installed HPT stage 1 disk, HPT stage 2 disk, forward HPT rotor seal, or stages 7-9 compressor rotor spool with a part number and serial number identified in Table 1 to paragraph (c) or in GE GE90-100 Service Bulletin 72-0914 (dated Jan 25, 2023) tables 1-3.
Whether AD 2023-26-07 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.
How AD compliance is recorded
A valid compliance record (14 CFR 43.9) states:
Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.
Look up a tail number →Read the full directive (Federal Register)Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.