# SDR P7U2001F00005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 31, 2001
- Submitted: November 21, 2001
- Operation: Air carrier
- Aircraft: N379BJ
- Make and model: Boeing 737*
- Aircraft serial: 32777
- System (JASC): [3150 · Central Warning](https://openairdocs.org/jasc/3150)
- Part: Switch
- Part number: 0881031006
- Condition: Failed
- Location: Cockpit
- Part time: 8 hours
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/P7U2001F00005

## Discrepancy

SWITCH CONTACTS REMAINED IN OPEN CONDITION CAUSING MASTER CAUTION SYSTEM TO BE IN A RESET STATE AT ALL TIMES;  NOT ALLOWING MASTER CAUTION WARNINGS TO BE DISPLAYED.  INTERNAL MICROSWITCH FAILURE.  REMOVED AND REPLACED SWITCH ASSEMBLY, SYSTEM OPERATIONAL, CHECK SATISFACTORY.(K)

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