AD 47-47-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | FS 2003 Corp. | PA-12 | Airworthiness Directives; Piper Model PA-12 Aircraft |
Unsafe Condition
The upper end of the tie strap on the landing gear may fail due to insufficient reinforcement, leading to potential structural failure of the landing gear during operation.
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Required Actions
Reinforce the upper end of the tie strap with a 4130 steel plate (Piper No. 10028-13) by edge welding. Install a trapezoidal gusset plate (Piper No. 10028-14) on each side of the upper strap attachment by forming and edge welding on assembly.
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Compliance Time
prior to January 15, 1948
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Affected Aircraft
PA-12 Aircraft Serial Numbers 12-221, 12-236, 12-239, 12-244, 12-250 and Up to 12-3561 and 12-3901 to 12-3988.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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