AD 50-46-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC3-G102 | Airworthiness Directives; DOUGLAS All Models DC3 and C-47 Series Aircraft |
| aircraft | The Boeing Company | DC3-G102A | Airworthiness Directives; DOUGLAS All Models DC3 and C-47 Series Aircraft |
| aircraft | The Boeing Company | DC3-G103A | Airworthiness Directives; DOUGLAS All Models DC3 and C-47 Series Aircraft |
| aircraft | The Boeing Company | DC3-G202A | Airworthiness Directives; DOUGLAS All Models DC3 and C-47 Series Aircraft |
| aircraft | The Boeing Company | DC3A-S1C3G | Airworthiness Directives; DOUGLAS All Models DC3 and C-47 Series Aircraft |
| aircraft | The Boeing Company | DC3A-S1CG | Airworthiness Directives; DOUGLAS All Models DC3 and C-47 Series Aircraft |
| aircraft | The Boeing Company | DC3A-S4C4G | Airworthiness Directives; DOUGLAS All Models DC3 and C-47 Series Aircraft |
| aircraft | The Boeing Company | DC3A-SC3G | Airworthiness Directives; DOUGLAS All Models DC3 and C-47 Series Aircraft |
| aircraft | The Boeing Company | DC3A-SCG | Airworthiness Directives; DOUGLAS All Models DC3 and C-47 Series Aircraft |
| aircraft | The Boeing Company | DC3C-R-1830-90C | Airworthiness Directives; DOUGLAS All Models DC3 and C-47 Series Aircraft |
Unsafe Condition
Inability to feather the propeller due to inadequate feathering oil supply following loss of engine oil.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the quantity of oil retained in the tank by the propeller feathering standpipe in level flight attitude. If less than 1.5 gallons, rework the standpipe to retain at least 1.5 gallons. Aircraft with C-47 type oil tanks (Douglas P/N 5110511) and standpipe (Douglas P/N 1355088) are considered satisfactory.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Not later than the first engine change after December 1, 1950.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Douglas DC3 and C-47 Series Aircraft utilizing a standpipe in the engine oil tank for propeller feathering oil reserve.
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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