# SDR 2008UALA04100

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 1, 2008
- Submitted: August 12, 2008
- Operation: Air carrier
- Aircraft: [N302UA](https://openairdocs.org/aircraft/N302UA), registered now
- Make and model: Boeing 737322
- Aircraft serial: 23643
- Aircraft time: 61,396 hours, 36,428 cycles
- Engine: Cfmint CFM563C1
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Switch
- Part number: W20168
- Condition: Inoperative
- Location: Fire Warning
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2008UALA04100

## Discrepancy

DURING FIRE TEST, THE F/O'S MASTER FIRE WARNING LIGHT WILL NOT ILLUMINATE.  FOUND FAULTY SWITCH. REPLACED F-O MASTER WARNING SWITCH. OPS CHECKED OK.  ACFT OK FOR SERVICE.

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