Airworthiness Directive 2023-18-04
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 CF6-80E1A2, CF6-80E1A3, CF6-80E1A4, and CF6-80E1A4/B engines. This AD was prompted by a manufacturer investigation that revealed that a certain forward outer seal and certain high-pressure turbine rotor (HPTR) stage 1 disks and rotating seals were manufactured from material suspected to contain iron inclusion, which may cause reduced material properties and a lower fatigue life capability. This AD requires the replacement of the affected forward outer seal, HPTR stage 1 disks, and rotating seals. The FAA is issuing this AD to address the unsafe condition on these products.
Which aircraft AD 2023-18-04 applies to
Applies only to engines with an installed forward outer seal (P/N 1778M70P03, S/N NCU65340), HPTR stage 1 disk (P/N 1863M36G06, S/N TMT5TD23, TMT5TD26, or TMT5TD27), or rotating seal (P/N 1778M69P06, S/N BTB20610, BTB20611, BTB20612, or BTB26650).
Whether AD 2023-18-04 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.