AD 99-24-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric Company | CF6-80E1A2 | Airworthiness Directives; General Electric Company CF6-80E1A2 Series Turbofan Engines |
Unsafe Condition
Low cycle fatigue (LCF) cracking and failure of stage 2 high pressure turbine (HPT) disks and impeller spacers could result in an uncontained engine failure and damage to the aircraft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove stage 2 HPT disks (P/N 1639M50P03) from service prior to exceeding new lower cyclic life limits (3,400 CSN) and replace with serviceable parts. Implement a drawdown program for disks exceeding or approaching the new limits based on their cycles-since-new (CSN) on the AD's effective date. Remove HPT impeller spacers (P/N 1473M85P02) prior to accumulating 5,100 CSN.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Required as indicated, unless accomplished previously.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
General Electric Company CF6-80E1A2 series turbofan engines with stage 2 HPT disks (P/N 1639M50P03) and HPT impeller spacers (P/N 1473M85P02) installed, including those on Airbus Industrie A330 series airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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