# SDR UPS99429662

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 19, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N680UP
- Make and model: Boeing 747-SR-46
- Registry model: [Boeing 747-SR-46](https://openairdocs.org/model/boeing-747-sr-46) (OpenAirDocs)
- Aircraft serial: 20923
- System (JASC): [3150 · Central Warning](https://openairdocs.org/jasc/3150)
- Part: Warning Syst
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: CR
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS99429662

## Discrepancy

ON SEVERAL OCCASIONS INFLIGHT MASTER WARNING BRIEFLY FLASHED AND FIRE BELL BRIEFLY SOUNDED.  ALL OTHER INDICATIONS NORMAL.  FUNCTION TEST APU FIRE TEST OPS TEST NORMAL PER MM26-22-00.

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