AD 47-42-19
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-6 | Airworthiness Directives; DOUGLAS DC-6 Aircraft |
| aircraft | The Boeing Company | DC-6A | Airworthiness Directives; DOUGLAS DC-6 Aircraft |
| aircraft | The Boeing Company | DC-6B | Airworthiness Directives; DOUGLAS DC-6 Aircraft |
Unsafe Condition
Cracks progressing beyond stop holes in the horizontal stabilizer front spar caps could result in structural failure.
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Required Actions
Inspect for signs of cracks or progress of cracks at each engine change period. If elevator fifth hinge modification is incorporated, inspection may be extended to every other engine change period but not exceeding 3,000 hours of airplane operation. Discontinue operation if cracks progress beyond stop holes until corrective measures are determined.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
at every engine change
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Affected Aircraft
Douglas DC-6, DC-6A, DC-6B aircraft with serial numbers 42854 to 42894, inclusive; 43000 to 43012, inclusive; 43055, 43056, and 43062.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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