# SDR 9711446739

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 11, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N639US
- Make and model: Boeing 747251F
- Aircraft serial: 23887
- System (JASC): [4950 · APU Bleed Air System](https://openairdocs.org/jasc/4950)
- Part: Packing
- Condition: Leaking
- Location: Apu  Duct
- Stage of operation: TX
- Nature of condition: J
- Precautionary procedure: F
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9711446739

## Discrepancy

DURING GROUND OPERATION, THE APU FIRE WARNING ACTIVATED.  FLIGHT CREW FOLLOWED COCKPIT OPERATING MANUAL PROCEDURES AND DISCHARGED THE FIRE BOTTLE.  REPLACED PACKING ON THE AIR INLET ANTI-ICE DUCT, OPERATIONAL CHECK GOOD.

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