AD 53-19-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | C54-DC | Airworthiness Directives; DOUGLAS All DC-4 and C54-DC Series Aircraft |
| aircraft | The Boeing Company | DC-4 | Airworthiness Directives; DOUGLAS All DC-4 and C54-DC Series Aircraft |
Unsafe Condition
The magnesium cooling fan in the Eclipse Type 901 generator poses a fire hazard due to its material composition.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove the magnesium fan unit and install Eclipse-Pioneer spacer P/N 866570 in its place as per Eclipse-Pioneer Service Bulletin No. 505.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
By the next engine overhaul, but not later than April 1, 1954.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Douglas DC-4 and C54-DC Series aircraft utilizing Eclipse-Pioneer Type 901 generators.
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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