AD 77-23-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-23-250 | Airworthiness Directives; Piper Models PA-23-250 and PA-E23-250 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-23-250 (Navy UO-1) | Airworthiness Directives; Piper Models PA-23-250 and PA-E23-250 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-E23-250 | Airworthiness Directives; Piper Models PA-23-250 and PA-E23-250 Airplanes |
Unsafe Condition
Fuel flow interruption and engine power loss due to possible adverse fuel vaporization during crossfeed operation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Incorporate the applicable flight manual revision listed in Piper Service Bulletin No. 530 into the FAA-DOA Approved Airplane Flight Manual. The Chief, Engineering & Manufacturing Branch, may adjust the inspection interval upon request with substantiating data.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 10 hours in service 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-23-250 and PA-E23-250, serial numbers 27-2000 to 27-2504 (fuel injected only) and 27-2505 to 27-7754044.
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.