# SDR UPS02438067

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 19, 2002
- Submitted: April 19, 2002
- Operation: Air carrier
- Aircraft: N525UP
- Make and model: Boeing 747 212B
- Registry model: [Boeing 747 212B](https://openairdocs.org/model/boeing-747-212b) (OpenAirDocs)
- Aircraft serial: 21939
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Warning
- Condition: False Activation
- 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/UPS02438067

## Discrepancy

INSPECTION TYPE:N/A DURING CRUISE AT FL270, ALL FIRE WARNING/DET LIGHTS ILLUMINATED MOMENTARILY AND FIRE BELL ALSO RANG MOMENTARILY.  THE FIELD OFF AND GEN OPEN LIGHT ON NUMBER 1 GEN WERE ILLUMINATED.  REFER TO ITEM 2 AND T/S FOUND THAT FIRE WARNING/DET LIGHT WERE CAUSED BY SWITCHING ELECTRIC POWER TRANSFER.  FIRE WARNING OPERATIONAL TEST OK PER AMM 26-11-00 P501, AMM 26-15-00 P501 AND AMM 26-17-00 P501.

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