# SDR UIEA01108

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 28, 2001
- Submitted: May 6, 2002
- Operation: Air carrier
- Aircraft: N534MC
- Make and model: Boeing 747-2F6B
- Registry model: [Boeing 747-2F6B](https://openairdocs.org/model/boeing-747-2f6b) (OpenAirDocs)
- Aircraft serial: 21832
- System (JASC): [2697 · Fire Protection System Wiring](https://openairdocs.org/jasc/2697)
- Part: Wire
- Condition: Shorted
- Location: Fire Loop
- Stage of operation: TO
- How discovered: O
- Nature of condition: N
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA01108

## Discrepancy

ON TAKEOFF ROLL, FIRE DETECTION MASTER CAUTION LIGHT FLICKERED.  NR 2A FIRE LOOP NACELLE JUMPED FROM 1-5.  ACCOMPLISHED PNEUMATIC LEAK CHECK.  NO LEAKS FOUND.  NR 2 ENGINE FIRE DETECTION LOOP 'A' FAILED OPERATIONAL TEST.  WIRE NR W3296-2W10-18R FOUND SHORTED TO GROUND ON THE BACK OF CONNECTOR DX202A.  WIRING REPLACED AS PER SWPM 20-10-11.  LOOP 'A' OPERATIONAL TESTED OK PER MM 26-11-00.  (M)

---
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.