AD 50-10-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sierra Hotel Aero, Inc. | Navion (Army L-17A) | Airworthiness Directives; All Navion Airplanes, Serial Numbers NAV-4-2 Through NAV-4-1790 |
| aircraft | Sierra Hotel Aero, Inc. | Navion A (Army L-17B and L-17C) | Airworthiness Directives; All Navion Airplanes, Serial Numbers NAV-4-2 Through NAV-4-1790 |
| aircraft | Sierra Hotel Aero, Inc. | Navion B | Airworthiness Directives; All Navion Airplanes, Serial Numbers NAV-4-2 Through NAV-4-1790 |
Unsafe Condition
The flexible hose (Ryan Drawing 145-42202) between the exhaust shroud and the carburetor heat valve may deteriorate with age and collapse, resulting in considerable loss of engine power.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the hose not later than March 20, 1950, and after each 25 hours of aircraft operation until replaced. Replace hoses in poor condition immediately with wire reinforced hose (Arrowhead Rubber Co. type 8AX or equivalent). Complete installation of the wire reinforced hose by September 1, 1950.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
by September 1, 1950
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Affected Aircraft
Sierra Hotel Aero, Inc. Navion (Army L-17A), Navion A (Army L-17B and L-17C), Navion B airplanes, serial numbers NAV-4-2 through NAV-4-1790
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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