# SDR MALA040335

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 13, 2004
- Submitted: April 20, 2004
- Operation: Air carrier
- Aircraft: N520XJ
- Make and model: Bac AVRO146RJ85A
- Aircraft serial: E2345
- Aircraft time: 10,238 hours, 10,523 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Printed Ckt Board
- Part number: 523402
- Part serial: OFF911
- Condition: Contaminated
- Location: Fire Warning Sys
- Stage of operation: TO
- How discovered: O
- Nature of condition: N
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MALA040335

## Discrepancy

FIRE WARNING FLASHED ON TAKEOFF ROLL.  LOOP FAULT ON ALL 4 ENGINES ON LOOP A, WENT AWAY WHEN SWITCH TO LOOP B.  MAINTENANCE FOUND PCB WAS CONTAMINATED.  REPLACED PCB, ALL CHECKS GOOD IAW 26-11-00 501, P/N 5234-02, S/N OFF 911, S/N ON 875.

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