AD 72-21-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-20 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-20-115 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-20-135 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-20S | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-20S-115 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-20S-135 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22-108 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22-135 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
| aircraft | Piper Aircraft Inc. | PA-22-150 | Airworthiness Directives; Piper Models PA-20 and PA-22 Aircraft |
Unsafe Condition
Fuel line failure due to flexible fuel line assembly P/N 70322-32 routed from fuel strainer to carburetor.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Identify flexible fuel line assembly using metal identification band. Replace P/N 70322-32 hose with P/N 17766-66 or equivalent approved part. Ensure installation prevents abrasion, interference chafing, and heat damage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 100 hours in service or at next annual inspection, whichever occurs first, after the effective date of this AD unless already accomplished
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Piper Models PA-20 (S/N 20-1 and up) and PA-22 (S/N 22-1 to 22-9393 inclusive)
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.