AD 47-02-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | C54-DC | DOUGLAS Model C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54A-DC | DOUGLAS Model C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54B-DC | DOUGLAS Model C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54D-DC | DOUGLAS Model C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54E-DC | DOUGLAS Model C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54G-DC | DOUGLAS Model C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | DC-4 | DOUGLAS Model C-54 and DC-4 Aircraft |
Unsafe Condition
Damage to the electrical system due to chafing, heat, or foreign matter, and loose terminals and connections may exist.
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Required Actions
Inspect the entire electrical system for evidence of damage due to chafing, heat, or foreign matter; and loose terminals and connections. Pay particular attention to wiring subjected to heat from voltage regulators, the buss to the main cabin junction box, and any screws projecting into cable ducts. Correct any unsatisfactory conditions.
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Compliance Time
not later than next periodic inspection
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Affected Aircraft
The Boeing Company Model C54-DC, C54A-DC, C54B-DC, C54D-DC, C54E-DC, C54G-DC, and DC-4 aircraft
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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