AD 51-26-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lear, Inc. | Automatic Pilots | Airworthiness Directives; LEAR: Applies to All L-2 Series Automatic Pilots |
Unsafe Condition
Servo clutches in L-2 Series autopilot servos may lack proper marking (green dot on shaft, green dot on nameplate, or yellow dot on clutch housing), indicating potential clutch failure or improper installation.
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Required Actions
Inspect all L-2 Series autopilot servos to check for the presence of green or yellow dots as specified. Replace any clutches not marked accordingly with replacement clutches supplied by Lear upon request.
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Compliance Time
next 100-hour airplane inspection, but not later than January 1, 1952
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Affected Aircraft
Lear, Inc. Automatic Pilots, models 121C, 121D, 121F, 121G, 121H, 121J, manufactured prior to March 1, 1952
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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