AD 47-42-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-6 | Airworthiness Directives; DOUGLAS DC-6 Airplane |
| aircraft | The Boeing Company | DC-6A | Airworthiness Directives; DOUGLAS DC-6 Airplane |
| aircraft | The Boeing Company | DC-6B | Airworthiness Directives; DOUGLAS DC-6 Airplane |
Unsafe Condition
The horizontal stabilizer rear spar assembly and panel structure may have insufficient AD5 rivets in specified zones, leading to structural weakening or failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the horizontal stabilizer rear spar assembly and panel structure for insufficient AD5 rivets in specified zones. Add rivets as necessary to meet minimum counts (12 top/bottom in zone 4, 4 through the -68 doubler, 6 between -12 stiffener and doubler, and continue pattern in zone 3).
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
not later than next No. 3 inspection (or not later than next 150 hours for non-air-carrier operations)
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Douglas DC-6, DC-6A, DC-6B models with serial numbers 42854, 42855, 42857, 42858, 42860 to 42865, Inclusive; 42867, 42869 to 42880, Inclusive; 42882 to 42891, Inclusive; 43000, 43001, 43003 to 43009, Inclusive; 43055 and 43056.
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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