# SDR KCSA07101

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 22, 2007
- Submitted: December 28, 2007
- Operation: Air carrier
- Aircraft: [N713CK](https://openairdocs.org/aircraft/N713CK), registered now
- Make and model: Boeing 747-2B4B
- Registry model: [Boeing 747-2B4B](https://openairdocs.org/model/boeing-747-2b4b) (OpenAirDocs)
- Aircraft serial: 21099
- Aircraft time: 69,684 hours, 18,268 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Warning
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: CR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/KCSA07101

## Discrepancy

FIRE DETECTION LIGHT ON P5 PANEL AND FAULT LIGHT ON F/E PANEL FLICKERS INTERMITTENTLY AND THEN CAME ON STEADY.  NO NAC TEMP INDICATED.  ISOLATED FAULT TO NR 1 "A" LOOP.  PLACED NR 1 SWITCH TO "B" AND LIGHT EXTINGUISHED.  T/S PER AMM 26-11-00.  UNABLE TO DUPLICATE.  SYSTEM OPS CKS OK.

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