AD 48-29-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sierra Hotel Aero, Inc. | Navion (Army L-17A) | Airworthiness Directives; All Navion Airplanes Employing Carter Engine Driven Fuel Pumps Not Presently Equipped With Vent Drain Lines |
Unsafe Condition
Rupture of the main diaphragm of Carter fuel pumps, which can cause fuel to squirt from the pump breather hole onto the engine, creating a fire hazard.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove the fiber screen and snap ring from the pump breather opening, install an overboard drain line to carry fuel clear of the airplane, and ensure the drain line vents into a low pressure area away from engine/cabin heater exhaust and air intake lines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
as soon as possible but not later than October 15, 1948
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Affected Aircraft
Sierra Hotel Aero, Inc. Navion (Army L-17A) airplanes employing Carter engine driven fuel pumps not presently equipped with vent drain lines
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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