AD 77-21-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-36-285 | Airworthiness Directives; Piper Model PA-36-285 Airplanes |
Unsafe Condition
Rudder spar cracks at hinge attachment points could cause hazards in flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the rudder spar at hinge attachment points for cracks using a magnifying glass of at least ten power within the next 50 hours in service from the effective date. If cracks exist, replace the rudder assembly with a new Piper Part No. 98125-04 or equivalent. After installing the new rudder assembly, compliance with this AD may be dispensed with.
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Compliance Time
Within the next 50 hours in service from the effective date of this AD unless previously accomplished within the past 50 hours in service and at intervals not to exceed 100 hours in service from the last inspection.
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Affected Aircraft
Piper Aircraft Inc. Model PA-36-285, Serial Nos. 36-7360001 through 36-7760003 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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