AD 72-11-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Grumman American Aviation Corporation | G-21 | Airworthiness Directives; Grumman Aircraft Model G-21 and G-21A Airplanes |
| aircraft | Grumman American Aviation Corporation | G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B) | Airworthiness Directives; Grumman Aircraft Model G-21 and G-21A Airplanes |
Unsafe Condition
Engine fuel starvation due to fuel vaporization within fuel feed lines to the engines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a permanent placard on or near the instrument panel in full view of the pilot using minimum 1/8 inch lettering stating 'Cross feed valve must be closed during all flight operations except for emergencies resulting from engine pump failure'.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 25 hours in service after the effective date of this AD
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Affected Aircraft
Grumman Aircraft Model G-21 and G-21A (converted military OA-9 and JRF series airplanes under TC 654)
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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