AD 98-22-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric Company | CF6-45A | Airworthiness Directives; General Electric Company CF6-6, -45, -50, -80A, and -80C2 Series Turbofan Engines |
| engine | General Electric Company | CF6-45A2 | Airworthiness Directives; General Electric Company CF6-6, -45, -50, -80A, and -80C2 Series Turbofan Engines |
| engine | General Electric Company | CF6-50A | Airworthiness Directives; General Electric Company CF6-6, -45, -50, -80A, and -80C2 Series Turbofan Engines |
| engine | General Electric Company | CF6-50C | Airworthiness Directives; General Electric Company CF6-6, -45, -50, -80A, and -80C2 Series Turbofan Engines |
| engine | General Electric Company | CF6-50C1 | Airworthiness Directives; General Electric Company CF6-6, -45, -50, -80A, and -80C2 Series Turbofan Engines |
| engine | General Electric Company | CF6-50C2 | Airworthiness Directives; General Electric Company CF6-6, -45, -50, -80A, and -80C2 Series Turbofan Engines |
| engine | General Electric Company | CF6-50C2B | Airworthiness Directives; General Electric Company CF6-6, -45, -50, -80A, and -80C2 Series Turbofan Engines |
| engine | General Electric Company | CF6-50C2D | Airworthiness Directives; General Electric Company CF6-6, -45, -50, -80A, and -80C2 Series Turbofan Engines |
| engine | General Electric Company | CF6-50CA | Airworthiness Directives; General Electric Company CF6-6, -45, -50, -80A, and -80C2 Series Turbofan Engines |
| engine | General Electric Company | CF6-50E | Airworthiness Directives; General Electric Company CF6-6, -45, -50, -80A, and -80C2 Series Turbofan Engines |
Unsafe Condition
Cracks in stage 1 fan disks due to titanium impurities including hard alpha or other high density inclusions introduced during manufacturing from older material (triple melt titanium alloys made prior to late 1984/early 1985), which can propagate to disk failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform an ultrasonic immersion inspection for cracks in stage 1 fan disks prior to further flight, and replace cracked disks with serviceable parts following specified Alert Service Bulletins.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
prior to further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
General Electric Company CF6-6, -45, -50, -80A, and -80C2 series turbofan engines with stage 1 fan disks identified by serial numbers in specified Alert Service Bulletins (ASBs).
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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