AD 2004-16-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 757 and 767 | Airworthiness Directives; Boeing Model 757 and 767 Series Airplanes |
Unsafe Condition
A cracked hanger arm of the hydraulic pump of the ram air turbine (RAT) that can fracture under load and lead to failure of the RAT to provide hydraulic power to the primary flight control system during an emergency when both engines have failed.
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Required Actions
Inspect to determine the serial number of the hydraulic pump in the ram air turbine (RAT). Take corrective action if necessary, which may include replacing, reworking, or reidentifying the hydraulic pump.
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Compliance Time
Required as indicated, unless accomplished previously.
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Affected Aircraft
Boeing Model 757-200, -200CB, -200PF, and -300 series airplanes, line numbers 1 through 998 inclusive; and Model 767-200, -300, -300F, and -400ER series airplanes, line numbers 1 through 869 inclusive, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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