AD 2010-12-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | General Electric | Company CF6-45 and CF6-50 Series | Airworthiness Directives; General Electric Company CF6-45 and CF6-50 Series Turbofan Engines |
Unsafe Condition
Uncontained failures of low-pressure turbine (LPT) rotor stage 3 disks and cracked LPT rotor stage 3 disks found during shop visit inspections, which could result in an uncontained engine failure and damage to the airplane.
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Required Actions
Initial and repetitive borescope inspections of the high-pressure turbine (HPT) rotor stage 1 and stage 2 blades for wear and damage, including excessive airfoil material loss. Additional borescope inspections and fluorescent penetrant inspection (FPI) of the LPT rotor stage 3 disk depending on borescope inspection results. Repetitive exhaust gas temperature (EGT) system checks.
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Compliance Time
Within 50 flight hours after the effective date of this AD.
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Affected Aircraft
General Electric Company CF6-45A, CF6-45A2, CF6-50A, CF6-50C, CF6-50CA, CF6-50C1, CF6-50C2, CF6-50C2B, CF6-50C2D, CF6-50C2-F, CF6-50C2-R, CF6-50E, CF6-50E1, and CF6-50E2 series turbofan engines with specified low-pressure turbine (LPT) rotor stage 3 disks installed.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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