# SDR PCAA0402167

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 11, 2004
- Submitted: February 17, 2004
- Operation: Air carrier
- Aircraft: N809EX
- Make and model: Dhav DHC8102
- Aircraft serial: 302
- Aircraft time: 31,304 hours, 34,677 cycles
- Engine: Pwa PW120
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Relay
- Condition: Faulty
- Location: Fire Detection
- Stage of operation: IN
- How discovered: V
- Nature of condition: N
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/PCAA0402167

## Discrepancy

AIRCRAFT APU HAS A HISTORY OF THE FIRE FAULT AND CHECK FIRE DETECT LIGHTS ILLUMINATING AFTER SHUTTING DOWN THE APU.  MAINTENANCE HAS COMPLIED WITH SEVERAL CHECKS AND HAS REPLACED THE RELAYS 2623-K1 AND 2622-K2.SYSTEM HAS NO HISTORY SINCE.  SYSTEM OPERATIONAL CHECK GOOD.

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