# SDR OZCA20141231010

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 31, 2014
- Submitted: January 2, 2015
- Operation: Air carrier
- Aircraft: [N431BC](https://openairdocs.org/aircraft/N431BC), registered now
- Make and model: Saab 340B
- Registry model: [Saab 340B](https://openairdocs.org/model/saab-340b) (OpenAirDocs)
- Aircraft serial: 340B260
- Aircraft time: 39,207 hours, 32,786 cycles
- Engine: Ge CT79B
- System (JASC): [6120 · Propeller Controlling System](https://openairdocs.org/jasc/6120)
- Part: Pressure Switch
- Part number: 1103P0620
- Part serial: 1057
- Condition: Defective
- Location: Auto Coarsen
- Stage of operation: DE
- How discovered: O
- Nature of condition: J
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/OZCA20141231010

## Discrepancy

DURING DESCENT NR 1 ENG AUTO COARSENED.  TROUBLE SHOT SYS & PERFORMED GND OPERATIONAL CHECKS OF AUTO COARSEN SYS.  ALL CHECKED SATISFACTORY.  R & R LT AUTO COARSEN PRESS SWITCH IAW MM.  OPERATIONAL CHECKED SATISFACTORY.

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