AD 78-01-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-31 | Airworthiness Directives; Piper Models PA-31, PA-31-325, and PA-31-350 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31-325 | Airworthiness Directives; Piper Models PA-31, PA-31-325, and PA-31-350 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-31-350 | Airworthiness Directives; Piper Models PA-31, PA-31-325, and PA-31-350 Airplanes |
Unsafe Condition
Adverse stability or handling qualities due to incorrect tension in the elevator bungee spring.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the elevator bungee spring for correct tension (30 lb. ±1 lb. for PA-31, 37 lb. ±1 lb. for PA-31-325 and PA-31-350). If tension is incorrect, alter the link per Piper Service Bulletin No. 549 or equivalent approved by the FAA. Submit substantiating data through an FAA Maintenance Inspector for compliance time adjustment.
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Compliance Time
within the next 25 hours in service after the effective date of this Airworthiness Directive unless already accomplished
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Affected Aircraft
Piper Models PA-31 (serial nos. 31-7612001-080, 31-7612082-091, 31-7612096, 31-7612099, 31-7612101-102, 31-7612104-105, 31-7612107-108), PA-31-325 (same serial ranges as PA-31), and PA-31-350 (serial nos. 31-7652001-015, 31-7652017-162, 31-7652164-170)
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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