AD 48-12-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | C54-DC | Airworthiness Directives; DOUGLAS C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54A-DC | Airworthiness Directives; DOUGLAS C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54B-DC | Airworthiness Directives; DOUGLAS C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54D-DC | Airworthiness Directives; DOUGLAS C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54E-DC | Airworthiness Directives; DOUGLAS C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54G-DC | Airworthiness Directives; DOUGLAS C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | DC-4 | Airworthiness Directives; DOUGLAS C-54 and DC-4 Aircraft |
Unsafe Condition
Failure to comply with fire prevention requirements, including installation of smoke detectors, engine section piping revisions, enclosed waste containers, and compliant interior materials may result in uncontained fires in baggage compartments, engine sections, and lavatories.
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Required Actions
Install smoke detectors in belly baggage compartments, revise engine section piping and fittings, install enclosed waste containers in lavatories, and ensure interior materials and finishes comply with CAR 4b requirements.
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Compliance Time
Not later than the dates specified in CAR Amendments 41-3, 42-2, and 61-2 as revised by special Civil Air Regulations Serial Nos. 385, 390, 390A, 390B and any subsequent regulations affecting these compliance dates.
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Affected Aircraft
The Boeing Company C-54 and DC-4 aircraft models: C54-DC, C54A-DC, C54B-DC, C54D-DC, C54E-DC, C54G-DC, DC-4, as specified by Civil Air Regulations Amendments 41-3, 42-2, and 61-2.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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