AD Amdt-39-10140
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed | L-188A and L-188C | Airworthiness Directives; Lockheed Model L-188A and L-188C Series Airplanes |
Unsafe Condition
Improper use of propeller ground beta during flight can lead to loss of airplane controllability, engine overspeed, and consequent loss of engine power due to power levers positioned below the flight idle stop.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Revise the Airplane Flight Manual (AFM) to prohibit positioning power levers below the flight idle stop during flight and include consequences of such positioning.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
Lockheed Model L-188A and L-188C 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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