AD 47-42-11
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 have been found near the ends of the tail stub extension of the horizontal stabilizer front spar caps, top and bottom, just inboard of the stabilizer joint, which may impair airworthiness if cracks propagate further.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the area at every No. 2 inspection period per Douglas Telegram A-214-529. Cut a 7/8-inch hole through skin and doubler, inspect for cracks with a 40-power lens, drill a 0.250-inch stop hole, and cover holes with a sheet metal plug and fabric patch. Do not operate if cracks extend beyond the stop hole until further instructions.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
not later than December 15, 1947
AI-generated summary from the source AD text. Verify against the official source before acting.
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.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.