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Aircraft maintenance TroubleShoot> Propeller De-ice

Ammeter shows low current over entire cycle

1. Aircraft voltage low under normal operating conditions.
2. Ammeter, switch, or circuit breaker faulty.
3. High resistance up to timer. Check for partially broken wire or lose or corroded connection in wiring between aircraft supply and timer input.
4. High contact resistance in timer.
5. One deicer element (or wiring connections to deicer) in each cycle out. Perform a heat test on deicer.

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Disclaimer: sacskyranch.com contains abundant information relating to aircraft maintenance. The information provided is not intended to supercede or supplement the F.A.A. approved maintenance and/or operator’s manuals. Those F.A.A. approved manuals must be utilized when performing maintenance and/or operating aircraft.