# SDR 2012FA0000237

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 25, 2012
- Submitted: April 25, 2012
- Operation: General aviation
- Aircraft: [N990TC](https://openairdocs.org/aircraft/N990TC), registered now
- Make and model: Cessna 550
- Registry model: [Cessna 550](https://openairdocs.org/model/cessna-550) (OpenAirDocs)
- Aircraft serial: 5500963
- Aircraft time: 4,037 hours
- System (JASC): [7830 · Engine Thrust Reverser](https://openairdocs.org/jasc/7830)
- Part: Pressure Switch
- Part number: 6607A745
- Part serial: Y00241
- Condition: Shorted
- Location: Thrust Reverser
- Part time: 4,038 hours
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2012FA0000237

## Discrepancy

NR 1 THRUST REVERSER "ARM" LIGHT ILLUMINATED CONTINUOUSLY,  WITH ENGINES SHUTDOWN.  THE FAULT LIES IN THE ARM LIGHT PRESSURE SWITCH.  INSTALLING A NEW SWITCH FIXED THE PROBLEM.

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