AD 47-27-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | C54-DC | DOUGLAS Model C-54-DC Series and DC-4 Airplanes |
| aircraft | The Boeing Company | C54A-DC | DOUGLAS Model C-54-DC Series and DC-4 Airplanes |
| aircraft | The Boeing Company | C54B-DC | DOUGLAS Model C-54-DC Series and DC-4 Airplanes |
| aircraft | The Boeing Company | C54D-DC | DOUGLAS Model C-54-DC Series and DC-4 Airplanes |
| aircraft | The Boeing Company | C54E-DC | DOUGLAS Model C-54-DC Series and DC-4 Airplanes |
| aircraft | The Boeing Company | C54G-DC | DOUGLAS Model C-54-DC Series and DC-4 Airplanes |
| aircraft | The Boeing Company | DC-4 | DOUGLAS Model C-54-DC Series and DC-4 Airplanes |
Unsafe Condition
Cracks in the spar web structure of the outer wing and center wing section, which may indicate fuel leaks due to cracked spar webs or rivets and seam leaks.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect spar web structure for loose rivets, cracks, or irregularities by opening quick-opening inspection doors. Repair cracks using Douglas Drawings 5354811 and 3344236 if found after AD 46-27-01 or in areas not covered by Service Bulletin C-54-205.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
at intervals not to exceed 170 hours
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Affected Aircraft
The Boeing Company models C54-DC, C54A-DC, C54B-DC, C54D-DC, C54E-DC, C54G-DC, and DC-4 airplanes
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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