AD 50-09-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | AT-6 (SNJ-2) | Airworthiness Directives; North American Models Model BC-1A, AT-6, AT-6A, AT-6B, and AT-6C Aircraft |
| aircraft | The Boeing Company | AT-6A (SNJ-3) | Airworthiness Directives; North American Models Model BC-1A, AT-6, AT-6A, AT-6B, and AT-6C Aircraft |
| aircraft | The Boeing Company | AT-6B | Airworthiness Directives; North American Models Model BC-1A, AT-6, AT-6A, AT-6B, and AT-6C Aircraft |
| aircraft | The Boeing Company | AT-6C (SNJ-4) | Airworthiness Directives; North American Models Model BC-1A, AT-6, AT-6A, AT-6B, and AT-6C Aircraft |
| aircraft | The Boeing Company | BC-1A | Airworthiness Directives; North American Models Model BC-1A, AT-6, AT-6A, AT-6B, and AT-6C Aircraft |
Unsafe Condition
Cracked stabilizer spar fittings and improper installation of shims may result in structural failure of the horizontal stabilizer connection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect horizontal stabilizer rear spar connection for cracked fittings and shim installation. Replace cracked or preset fittings with new 24 ST or X4130 bar stock fittings. Fabricate and install 24ST shims with specified dimensions and thickness to ensure proper fit.
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Compliance Time
prior to original certification
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Affected Aircraft
North American Models Model BC-1A, AT-6, AT-6A, AT-6B, and AT-6C Aircraft (Army models) and SNJ-2, SNJ-3, and SNJ-4 Aircraft (Navy models)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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