AD 46-11-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | AT-6 (SNJ-2) | Airworthiness Directives; North American Models BC-1A, AT-6, AT-6A, AT-6B, and AT-6C |
| aircraft | The Boeing Company | AT-6A (SNJ-3) | Airworthiness Directives; North American Models BC-1A, AT-6, AT-6A, AT-6B, and AT-6C |
| aircraft | The Boeing Company | AT-6B | Airworthiness Directives; North American Models BC-1A, AT-6, AT-6A, AT-6B, and AT-6C |
| aircraft | The Boeing Company | AT-6C (SNJ-4) | Airworthiness Directives; North American Models BC-1A, AT-6, AT-6A, AT-6B, and AT-6C |
| aircraft | The Boeing Company | BC-1A | Airworthiness Directives; North American Models BC-1A, AT-6, AT-6A, AT-6B, and AT-6C |
Unsafe Condition
Cracks in the inboard end of the landing gear retracting strut attachment support channel (P/N 55-14102 or 66-14102-1) at the wing outer panel joint.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the inboard end of the landing gear retracting strut attachment support channel for cracks. Install doubler angles (0.062 inch-29/32 inch x 1 inch or 1 3/8 inches x 6 3/4 inches long SAE No. 4130 steel) based on crack length: less than 2 inches use 1-inch leg with AN 442-AD4 rivets; over 2 inches use 1 3/8-inch leg with two rows of rivets. Replace rivets with AN 3 bolts where applicable. Drill 1/8-inch stop holes at crack ends. Use blind rivets if wing panel is installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
at each periodic inspection
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Affected Aircraft
North American Models BC-1A, AT-6, AT-6A, AT-6B, AT-6C (SNJ-2, SNJ-3, SNJ-4) with serial numbers below 41-34249 (Army) or 0-43692 (Navy)
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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