AD 76-11-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Piper Aircraft Inc. | PA-23-250 | Airworthiness Directives; Piper Model PA-23-250 Airplanes |
| aircraft | Piper Aircraft Inc. | PA-23-250 (Navy UO-1) | Airworthiness Directives; Piper Model PA-23-250 Airplanes |
Unsafe Condition
Magnetic compass deviations exceeding 10 degrees when the landing/taxi lights and/or heater are turned on, creating hazards.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Check magnetic compass function per Service Bulletin No. 493 or approved method. If deviation exceeds 10 degrees, perform wiring modification per the same service bulletin or approved method. Submit request with data through FAA Maintenance Inspector for extended compliance time or alternate methods.
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Compliance Time
within the next 100 hours' time in service after the effective date of this AD unless already accomplished
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Affected Aircraft
Piper Model PA-23-250 (6 place) serial numbers 27-3837, 27-3944 to 27-7554092 inclusive; 27-7554094 to 27-7554159 inclusive; 27-7554161 to 27-7654018 inclusive; 27-7654020 to 27-7654024 inclusive; 27-7654026 to 27-7654036 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
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