# SDR QXEA01000090

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 3, 2001
- Submitted: February 5, 2001
- 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: 31,200 hours, 37,677 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Loop
- Part number: 473054
- Part serial: 0682
- Condition: Malfunctioned
- Location: Nr 2 Engine
- Part time: 3,738 hours, 5,291 cycles
- Stage of operation: CL
- 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/QXEA01000090

## Discrepancy

SEA- CLIMBING OUT OF FAT, THE NR 2 FIRE WARNING ALARM GAVE FOUR SHORT WARNINGS OF A SECOND OR LESS.  ABNORMAL INDICATIONS 470/480 TGT 410, WARNING BETWEEN 10,000 AND 25,000 FEET.  REMOVED AND REPLACED NR 2 ENGINE FIRE CONTROL UNIT AND NR 2 SENSING LOOP CABLE.  AIRCRAFT RETURNED TO SERVICE.  OPERATIONAL CHECKS GOOD.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.