# SDR DLM88001106

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 7, 2000
- Submitted: June 14, 2000
- Operation: Air carrier
- Aircraft: [N994DL](https://openairdocs.org/aircraft/N994DL), registered now
- Make and model: Doug MD-88
- Registry model: [Doug MD-88](https://openairdocs.org/model/mcdonnell-douglas-md-88) (OpenAirDocs)
- Aircraft serial: 53346
- Aircraft time: 24,206 hours, 19,016 cycles
- Engine: Pwa JT8D219
- Engine time: 8,451 hours, 14,314 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Duct
- Part number: 38849302
- Part serial: P80364
- Condition: Ruptured
- Location: Apu
- Part time: 8,451 hours, 14,314 cycles
- 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/DLM88001106

## Discrepancy

APU FIRE WARNING SOUNDED WHILE AT GATE RUNNING APU FOR 5 MIN WITH GEN AND PACKS ON.  CREW SHUTDOWN APU AND FIRED NR 1 EXTINGUISHER.  FOUND FLEX COUPLING AT SURGE CONTROL VALVE BLOWN.  REPLACED NR 1 FIRE EXTINGUISHER AND PUT APU ON MCO 49-00-01A.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.