AD 2000-22-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747 | Airworthiness Directives; Pratt & Whitney PW4000 Series Turbofan Engines |
| aircraft | McDonnell Douglas | MD-11 | Airworthiness Directives; Pratt & Whitney PW4000 Series Turbofan Engines |
| engine | Pratt & Whitney | PW4000 Series | Airworthiness Directives; Pratt & Whitney PW4000 Series Turbofan Engines |
Unsafe Condition
Reports of high pressure compressor (HPC) surges in engines equipped with the HPC cutback stator (CBS) configuration, which could lead to a multiple-engine power loss during critical flight phases such as takeoff or climb.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Limit the number of engines with the HPC CBS configuration to one per airplane. Prohibit the installation of engines with HPC modules modified after the effective date of this AD to incorporate the HPC CBS configuration.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 flight hours after the effective date of this AD.
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Affected Aircraft
Pratt & Whitney PW4000 series turbofan engines (PW4050, PW4052, PW4056, PW4060, PW4060A, PW4060C, PW4062, PW4460, PW4462) with HPC modules incorporating PW service bulletin PW4ENG 72-706, Revision 3, or earlier, or PW4ENG 72-711, used on Boeing 747, Boeing 767, and McDonnell Douglas MD-11 series airplanes.
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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