AD 47-02-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | C54-DC | MCDONNELL DOUGLAS C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54A-DC | MCDONNELL DOUGLAS C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54B-DC | MCDONNELL DOUGLAS C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54D-DC | MCDONNELL DOUGLAS C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54E-DC | MCDONNELL DOUGLAS C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | C54G-DC | MCDONNELL DOUGLAS C-54 and DC-4 Aircraft |
| aircraft | The Boeing Company | DC-4 | MCDONNELL DOUGLAS C-54 and DC-4 Aircraft |
Unsafe Condition
Failures in service of the main 9" Douglas aluminum accumulator
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Required Actions
Replace the main 9" Douglas aluminum accumulator with at least one 7 1/2" steel accumulator (Bendix P/N 406920 or Vickers P/N AA14308B) or a Vickers 10" accumulator Model AA-14310.
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Compliance Time
not later than August 1, 1947
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Affected Aircraft
McDonnell Douglas C-54 and DC-4 Aircraft including models C54-DC, C54A-DC, C54B-DC, C54D-DC, C54E-DC, C54G-DC, and DC-4
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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