AD 2001-11-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Raytheon | Aircraft Company Models 99 | Airworthiness Directives; Raytheon Aircraft Company Models 99, 99A, 99A (FACH), A99, A99A, B99, and C99 Airplanes |
Unsafe Condition
Fatigue cracks may develop on the main landing gear (MLG) hydraulic actuator end caps, specifically part number 4A125C32, which could lead to hydraulic fluid leakage and subsequent gear collapse.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect all MLG hydraulic actuators to determine the installed end cap part number. Replace any actuator with a part number 4A125C32 end cap.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 200 hours time-in-service (TIS) after July 23, 2001.
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Affected Aircraft
Raytheon Aircraft Company Models 99, 99A, 99A (FACH), A99, A99A, B99, and C99 airplanes, with serial numbers U-1 through U-49 and U51 through U-164 for Models 99, 99A, 99A (FACH), A99, A99A, and B99; and U-50 and U-165 through U-239 for Model C99, equipped with hydraulic landing gear.
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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