AD 62-08-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Twin Commander Aircraft LLC | 680-F | Airworthiness Directives; Aero Commander Model 720 and 680F Aircraft |
| aircraft | Twin Commander Aircraft LLC | 720 | Airworthiness Directives; Aero Commander Model 720 and 680F Aircraft |
Unsafe Condition
Fuel and fuel fumes are released within the cockpit area behind the instrument panel through the fuel pressure gage case vent as a result of gage diaphragm rupture.
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Required Actions
Install a fuel drain line leading from the fuel pressure gage vent connection and route it overboard through the belly of the aircraft in accordance with Aero Commander Service Bulletin No. 78 or an FAA approved equivalent.
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Compliance Time
within the next 25 hours' time in service after the effective date of this directive
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Affected Aircraft
Aero Commander Model 720 and 680F aircraft with serial numbers 1 through 1170, except serial numbers 1133, 1153, 1156, 1162, models 720, and pressurized versions of Model 680F.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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