AD 2011-02-07
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
Critical life-limited rotating engine part failure, which could result in an uncontained engine failure and damage to the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect HPT rotor stage 1 and stage 2 blades for wear and damage, including excessive airfoil material loss. Perform FPI of the LPT rotor stage 3 disk under certain conditions and remove the disk from service before further flight if found cracked. Conduct an ultrasonic inspection (UI) of the LPT rotor stage 3 disk forward spacer arm. Perform initial and repetitive engine core vibration surveys. Report to the FAA any crack findings, disks that fail the UI, and engines that fail the engine core vibration survey.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the effective date of the AD (February 22, 2011)
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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, CF6-50E, CF6-50E1, and CF6-50E2 turbofan engines with certain LPT rotor stage 3 disks installed, as listed in Table 1 of the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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