AD 49-12-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sierra Hotel Aero, Inc. | Navion (Army L-17A) | Airworthiness Directives; NAVION All Airplanes Equipped With Romec Engine-Driven Fuel Pumps. |
| aircraft | Sierra Hotel Aero, Inc. | Navion A (Army L-17B and L-17C) | Airworthiness Directives; NAVION All Airplanes Equipped With Romec Engine-Driven Fuel Pumps. |
Unsafe Condition
A 1/16-inch hole in the 1/8-inch pipe plug of Romec engine-driven fuel pumps creates a fire hazard by allowing fuel to squirt into the generator and engine compartment in case of pump seal failure.
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Required Actions
Replace all drilled vent plugs with undrilled plugs. Undrilled plugs are being primed with zinc chromate at the Ryan factory starting with serial number 1823.
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Compliance Time
As soon as possible, but not later than May 1, 1949.
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Affected Aircraft
Sierra Hotel Aero, Inc. Navion (Army L-17A) and Navion A (Army L-17B and L-17C) airplanes equipped with Romec engine-driven fuel pumps.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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