AD 50-25-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Univair Aircraft Corporation | 108 | Airworthiness Directives; STINSON Model All Model 108 Series Aircraft |
| aircraft | Univair Aircraft Corporation | 108-1 | Airworthiness Directives; STINSON Model All Model 108 Series Aircraft |
| aircraft | Univair Aircraft Corporation | 108-2 | Airworthiness Directives; STINSON Model All Model 108 Series Aircraft |
| aircraft | Univair Aircraft Corporation | 108-3 | Airworthiness Directives; STINSON Model All Model 108 Series Aircraft |
Unsafe Condition
Fuel seepage into the space between the inner cabin trim and the outer fabric covering of the fuselage, resulting in soaking of insulating material in the cabin wall due to fuel spillage during filling, thermal expansion in full tanks, or tank leakage.
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Required Actions
Install a drip strip similar to that shown in Figure 1 on the underside of each wing to prevent fuel from flowing from the wing to the fuselage.
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Compliance Time
not later than September 1, 1950
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Affected Aircraft
Univair Aircraft Corporation Model 108, 108-1, 108-2, 108-3 aircraft
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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