# SDR QXEA0000642

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 3, 2000
- Submitted: April 13, 2000
- Operation: Air carrier
- Aircraft: N486US
- Make and model: Fokker F.28 MK4000
- Registry model: [Fokker F.28 MK4000](https://openairdocs.org/model/fokker-f-28-mk4000) (OpenAirDocs)
- Aircraft serial: 11237
- Aircraft time: 28,675 hours, 35,303 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Harness
- Part number: 874620
- Condition: Chafed
- Location: Nr 2 Engine
- Stage of operation: DE
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QXEA0000642

## Discrepancy

SEA - DESCENDING THROUGH 24000 FEET, THE NR 2 FIRE WARNING LIGHTS AND AUDIBLE ALARM ACTIVATED FOR APPROXIMATELY 3 SECONDS, THEN QUIT.  THIS OCCURED 3 TIMES.  NO ABNORMAL ENGINE INDICATIONS WERE NOTED.  TEST OF SYSTEM WAS NORMAL.  INSPECTED FIRE LOOP.  FOUND CHAFED FLEX HARNESS.  REMOVED AND REPLACED FLEX HARNESS.  OPERATIONAL CHECKS GOOD.  AIRCRAFT RETURNED TO SERVICE.

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