# SDR 07FDEA00578

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 25, 2007
- Submitted: February 26, 2007
- Operation: Air carrier
- Aircraft: [N585FE](https://openairdocs.org/aircraft/N585FE), registered now
- Make and model: Doug MD-11
- Registry model: [Doug MD-11](https://openairdocs.org/model/mcdonnell-douglas-md-11) (OpenAirDocs)
- Aircraft serial: 48481
- Aircraft time: 51,845 hours, 10,243 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Element
- Part number: 710121
- Part serial: 21137
- Condition: Failed
- Location: Apu Compartment
- Stage of operation: DE
- How discovered: O
- Nature of condition: N
- Precautionary procedure: F
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/07FDEA00578

## Discrepancy

APU FIRE ALARM AND LIGHT CAME ON WITH APU FIRE LEVEL 3 ALERT AT 12000 FEET DESCENT ONTO FINAL APPROACH PULLED APU FIRE HANDLE AND DISCHARGED FIRE BOTTLE LIGHT WENT OUT AFTER 30 SECONDS BLEED AIR NR 2 AND NR 2 PACK AUTO SHUT DOWN.  APU COMPARTMENT INSPECTION REVEALED NO SIGNS OF FIRE OR HOT AIR LEAK.  APU WAS NOT RUNNING DURING OCCURRENCE.  MAINTENANCE REPLACED NR 2 FIRE EXTINGUISHER BOTTLE AND APU FIRE DETECT ELEMENT LOOP B.

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