# SDR HEEA20120514895

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 14, 2012
- Submitted: May 16, 2012
- Operation: Air carrier
- Aircraft: [N344PH](https://openairdocs.org/aircraft/N344PH), registered now
- Make and model: Urocop EC 135 P2
- Registry model: [Urocop EC 135 P2](https://openairdocs.org/model/eurocopter-deutschland-ec-135-p2) (OpenAirDocs)
- Aircraft serial: 0459
- Aircraft time: 4,795 hours
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Detector
- Part number: 17343162400
- Part serial: 043
- Condition: Shorted
- Location: Nr 1 Nacelle
- Stage of operation: NR
- 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/HEEA20120514895

## Discrepancy

ACFT EXPERIENCED AN INFLIGHT FIRE WARNING HORN BUT NO WARNING LIGHT.  FIRE BOTTLE WAS DISCHARGED INTO NR 1 ENGINE ON SHUTDOWN AS THE ENGINE PASSED 50 PERCENT AS DESIGNED.  TROUBLESHOOTING REVEALED THE FWD FIRE DETECTOR TO HAVE A HIGH RESISTANCE SHORT.  UNIT INDICATES A 850K OHM SHORT RISING TO 900K OHM THE LONGER THE DVOM IS HELD ON THE TERMINALS.  SWITCHING THE LEADS THE UNIT INDICATES AN OPEN.

---
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.