# SDR FDEA201803220752

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 22, 2018
- Submitted: March 22, 2018
- Operation: Air carrier
- Aircraft: [N643FE](https://openairdocs.org/aircraft/N643FE), registered now
- Make and model: Doug MD-11F
- Registry model: [Doug MD-11F](https://openairdocs.org/model/mcdonnell-douglas-md-11f) (OpenAirDocs)
- Aircraft serial: 48486
- Aircraft time: 63,752 hours, 14,651 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Detector
- Part number: 2215561503
- Condition: False Activation
- Location: Thrust Reverser
- Stage of operation: CR
- 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/FDEA201803220752

## Discrepancy

LEVEL 1 FIRE DETECTOR 1 FAIL ALERT FLASHED  INTERMITTENTLY FOR NEARLY THE ENTIRE FLIGHT,  BEGINNING PASSING APPROX FL280 ON INITIAL CLIMB AND RECEIVED AN AURAL NR 1 ENGINE FIRE WARNING ON SHORT FINAL. NO FIRE LIGHTS NOTED.  VERIFIED WIRING FROM FDCU P1-1690A AND P1-1690B TO R5-817 AND R5-237 IN CAC.  REMOVED AND REPLACED THE RT THRUST REVERSER LOWER FIRE DETECTOR ASSY IAW MM 26-11-03-4-2, NR 1 ENGINE B LOOP OPS CHECKED 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.