AD 2003-21-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna | Aircraft Company Model 525 | Airworthiness Directives; The Cessna Aircraft Company Model 525 Airplanes |
Unsafe Condition
Potential for a single-wire shorting to 28 volts or a failure of a relay in the electric pitch trim system such that the relay contacts remain closed, resulting in a runaway pitch trim condition where the pilot could not disconnect using the control wheel autopilot/trim disconnect switch.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Disengage the pitch trim circuit breaker and AP servo circuit breaker, then tie strap each of them to prevent re-engagement.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 5 calendar days or 10 hours time-in-service after October 22, 2003, whichever occurs first.
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Affected Aircraft
Cessna Aircraft Company Model 525 airplanes, serial numbers 525-0001, 525-0002, and 525-0004 through 525-0159, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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