AD 49-06-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-6 | DOUGLAS DC-6 Aircraft |
| aircraft | The Boeing Company | DC-6A | DOUGLAS DC-6 Aircraft |
| aircraft | The Boeing Company | DC-6B | DOUGLAS DC-6 Aircraft |
Unsafe Condition
Attachment bolts (fuselage to center wing, outer wing to center wing, vertical stabilizer to fuselage, horizontal stabilizer to fuselage, and engine mount to firewall) may fail due to fatigue or corrosion, leading to structural failure.
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Required Actions
Replace specified attachment bolts with approved replacements and scrap removed bolts. Use studs 2361992, 2361993, 4361995, and 4361994 (marked 'R') and NAS bolts with threads rolled after heat treatment for extended inspection intervals.
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Compliance Time
at every 8,000 hours of total flight time
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Affected Aircraft
The Boeing Company DC-6, DC-6A, DC-6B aircraft
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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