# SDR J7SA20170719001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 19, 2017
- Submitted: July 21, 2017
- Operation: Air carrier
- Aircraft: [N531FX](https://openairdocs.org/aircraft/N531FX), registered now
- Make and model: Bombdr BD1001A10
- Aircraft serial: 20150
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Sensing Element
- Condition: Faulty
- Location: Apu
- Stage of operation: CR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: F
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/J7SA20170719001

## Discrepancy

FALSE FIRE WARNING: "APU FIRE TASK" ILLUMINATED WITH A TRIPLE CHIME AND APU FIRE AURAL WARNING. CREW FOLLOWED CHECKLIST, TURNED OFF APU AND USED NR 2 FIRE EXTINGUISHER. LANDED WITHOUT INCIDENT. PRELIM INSPECTION REVEALS NO SIGNS OF FIRE. REPLACED APU SENSING ELEMENT, FIREWALL SENSING ELEMENT AND EDUCTOR SENSING ELEMENT ALONG WITH NR 2 FIRE BOTTLE AND SQUIB.  OPS CHECK GOOD.

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