# SDR DHL2002726005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 16, 2002
- Submitted: October 21, 2002
- Operation: Air carrier
- Aircraft: [N726DH](https://openairdocs.org/aircraft/N726DH), registered now
- Make and model: Boeing 727228
- Aircraft serial: 20409
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Warning
- Condition: Malfunctioned
- Location: Apu Bay
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: F, D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DHL2002726005

## Discrepancy

AFTER APU SHUT DOWN FIRE WARNING ILLUMINATED WITH NO BELL. BELL WOULD NOT TEST. DISCHARGED BOTTLE EMERGENCY PROCEDURE.  DEFERRED PER MEL 49-1 CAT. "C" PLACARD 10665 INSTALLED. MAINTENANCE WAS NOTIFIED.  REF. DMI #10665 - AFTER APU SHUTDOWN FIRE WARNING LIGHT ILLUMINATED NO BELLS. BELL WOULD NOT TEST. BLEW BOTTLE  PER EMERGENCY PROCEDURES.   REPLACED MUSHROOMED INDICATOR LAMP AND CLEANED DETECTOR CONNECTION. OPS NORMAL 3 TIMES SUSPECT MOISTURE. DMI CONTINUES DUE TO FIRE BOTTLE.  DISCHARGED BOTTLE DURING EMERGENCY PROCEDURES. BOTTLE WAS DEFERRED AND APU ALSO WAS DEFERRED ON 10-16-02.   INSTALLED NEW APU FIRE BOTTLE IAW B-MM 26-23-01. THIS CLEARS DMI 49-1 CONTROL 10665. PLACARDS REMOVED.

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