# SDR QXEA0202026

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 27, 2002
- Submitted: December 4, 2002
- Operation: Air carrier
- Aircraft: N492US
- Make and model: Fokker F.28 MK4000
- Registry model: [Fokker F.28 MK4000](https://openairdocs.org/model/fokker-f-28-mk4000) (OpenAirDocs)
- Aircraft serial: 11159
- Aircraft time: 36,399 hours, 47,500 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Apu
- Part number: 38075412
- Part serial: P37600
- Condition: Failed
- Location: Zone 200
- Part time: 32,592 hours, 114,125 cycles
- Stage of operation: UK
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QXEA0202026

## Discrepancy

PDX- SMOKE DETECTOR IN LAVATORY SOUNDING, WITH SLIGHT OIL SMELL IN AFT CABIN. APU STARTED APPROXIMITLY  15-20 MINUTES WITH CABIN HEATING SELECTED ON. ALARM STOPPED ABOUT ONE MINUTE AFTER SELECTING THE APU AIR OFF.REMOVED AND REPLACED APU. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.

---
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.