AD 54-23-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-6 | Airworthiness Directives; DOUGLAS All Models DC-6, DC-6A and DC-6B Series Aircraft |
| aircraft | The Boeing Company | DC-6A | Airworthiness Directives; DOUGLAS All Models DC-6, DC-6A and DC-6B Series Aircraft |
| aircraft | The Boeing Company | DC-6B | Airworthiness Directives; DOUGLAS All Models DC-6, DC-6A and DC-6B Series Aircraft |
| aircraft | The Boeing Company | Navy R6D-1 | Airworthiness Directives; DOUGLAS All Models DC-6, DC-6A and DC-6B Series Aircraft |
| aircraft | The Boeing Company | Navy R6D-1Z | Airworthiness Directives; DOUGLAS All Models DC-6, DC-6A and DC-6B Series Aircraft |
| aircraft | The Boeing Company | USAF C-118A | Airworthiness Directives; DOUGLAS All Models DC-6, DC-6A and DC-6B Series Aircraft |
Unsafe Condition
Fuselage skin cracks and structural softness between stringers 23 to 26 and between Stations 217 and 280 on the left side and Stations 238 and 280 on the right side, leading to rapid loss of cabin pressure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect fuselage areas between specified stringers and stations for skin cracks and structural softness at intervals based on total service time. Conduct internal inspections and repairs within 2,000 hours of operations. Follow Douglas Service Bulletins or equivalent for rework to discontinue inspections. Use FAA-approved maintenance programs for unpressurized aircraft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Compliance required as indicated in the AD text, with inspections due at intervals not exceeding 40, 500, or 200 hours of operation depending on aircraft total service time.
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Affected Aircraft
Douglas DC-6, DC-6A, DC-6B, Navy R6D-1, Navy R6D-1Z, USAF C-118A series aircraft.
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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