AD 72-21-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-23-250 (Navy UO-1) | Airworthiness Directives; Piper Model PA-23-250 Airplanes |
Unsafe Condition
Longitudinal stick force reversal during certain flight conditions due to insufficient longitudinal stability characteristics.
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Required Actions
Accomplish the alteration specified in Piper Service Bulletin No. 345 dated 7 October 1971, or an equivalent method approved by the FAA. Compliance must be completed within 30 days after the AD's effective date unless already done.
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Compliance Time
within 30 days after the effective date of this AD, unless already accomplished
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Affected Aircraft
Piper Model PA-23-250 (Navy UO-1) airplanes with serial numbers 27-4575 to 27-4587, 27-4589 to 27-4620, 27-4622 to 27-4672, 27-4674 to 27-4682, and 27-4684 to 27-4694 inclusive, and those altered by substituting specific Piper part numbers for older ones.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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