# SDR EIAA2011094

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 21, 2011
- Submitted: July 29, 2011
- Operation: Air carrier
- Aircraft: N489EV
- Make and model: Boeing 747230B
- Aircraft serial: 23393
- Aircraft time: 96,601 hours
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Circuit Card
- Condition: Malfunctioned
- Location: Fire Warning
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/EIAA2011094

## Discrepancy

NR 3 ENGINE "A" FIRE DETECTOR FLUCTUATES BETWEEN 2 AND 5 UNITS - SELECTED "B" LOOP - "B" LOOP TESTS OK.  TRANSFERED TO DMI 177 PER MEL 26-1 CAT C DUE 7-31-11 2359Z PLACARD INSTALLED.  RE-RACKED NR 3 FIRE WARNING AND DETECTOR CARD PER AMM 26-10-00.  OPS CHECK OK PER AMM 26-10-00 DMI 177 CLOSED, PLACARD REMOVED.

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