AD 69-23-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-18-150 | Airworthiness Directives; Piper Model PA-18-150 Airplanes |
Unsafe Condition
Lower longerons made from 1025 steel instead of approved 4130 steel could fail, posing a structural hazard.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect lower longerons by sanding, applying nitric acid, and testing for 1025 steel reaction. Ground aircraft if 1025 steel is found until approved alteration. Return to service if 4130 steel confirmed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
before further flight
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Affected Aircraft
Piper Model PA-18-150 airplanes, serial numbers 18-8809 through 18-8851, except 18-8844 and 18-8849.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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