AD 59-10-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-18 | Airworthiness Directives; Piper Models PA-18, PA-18A, PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-18A | Airworthiness Directives; Piper Models PA-18, PA-18A, PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-20 | Airworthiness Directives; Piper Models PA-18, PA-18A, PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22 | Airworthiness Directives; Piper Models PA-18, PA-18A, PA-20 and PA-22 Aircraft |
Unsafe Condition
Improper compliance with AD 56-26-02 resulted in gas tank cap vents not properly drilled, leading to potential blockage by the baffle and loose internal rivets indicated by an 'X' mark and rattle.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Check gas tank cap vents with a 0.030-inch diameter wire; rework caps by drilling two additional 0.067-inch holes 1/4 inch from the existing center hole through the bottom part of the cap and baffle. Ensure proper drilling by verifying wire insertion depth.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Not later than July 15, 1959, for Models PA-18, PA-18A, and PA-22, and not later than November 30, 1959, for Model PA-20.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Piper Aircraft Inc. Models PA-18, PA-18A, PA-20, and PA-22 aircraft.
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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