AD 77-13-21
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-24 | Airworthiness Directives; Piper Models PA-24, PA-24-250, PA-24-260, PA- 24-400, PA-30 and PA-39 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-24-250 | Airworthiness Directives; Piper Models PA-24, PA-24-250, PA-24-260, PA- 24-400, PA-30 and PA-39 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-24-260 | Airworthiness Directives; Piper Models PA-24, PA-24-250, PA-24-260, PA- 24-400, PA-30 and PA-39 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-24-400 | Airworthiness Directives; Piper Models PA-24, PA-24-250, PA-24-260, PA- 24-400, PA-30 and PA-39 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-30 | Airworthiness Directives; Piper Models PA-24, PA-24-250, PA-24-260, PA- 24-400, PA-30 and PA-39 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-39 | Airworthiness Directives; Piper Models PA-24, PA-24-250, PA-24-260, PA- 24-400, PA-30 and PA-39 Aircraft |
Unsafe Condition
Collapse of the landing gear after manual extension.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect components per Piper Service Letter No. 782A and replace those exceeding wear limits; inspect main landing gear bungee cords for frayed covering, breaks, or soft areas and replace as needed or every 500 hours or 3 years. Repeat inspections at intervals specified.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 100 hours in service for aircraft with 1000+ hours on AD effective date, or prior to 1100 hours in service for those with less than 1000 hours, unless already done.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Piper Models PA-24, PA-24-250, PA-24-260, PA-24-400 (except S/N 1), PA-30, and PA-39, certificated in all categories.
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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