# SDR ASOA02065

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 30, 2002
- Submitted: February 25, 2002
- Operation: Air carrier
- Aircraft: N857AS
- Make and model: Cndair CL6002B19
- Aircraft serial: 7411
- System (JASC): [2170 · Humidity Control System](https://openairdocs.org/jasc/2170)
- Part: Coalescer Bag
- Condition: Contaminated
- Location: Cabin
- Stage of operation: AP
- How discovered: O
- Nature of condition: B, J
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASOA02065

## Discrepancy

ON FINAL APPROACH INTO ATL, SHORTLY AFTER APU START UP, THE 'SMOKE TOILET' MESSAGE ILLUMINATED.  THE CAPTAIN IMMEDIATELY SHUT DOWN THE APU AND TRANSFERRED THE BLEEDS BACK TO THE ENGINE.  THE MESSAGE EXTINGUISHED.  THE FLIGHT ATTENDANT REPORTED A SLIGHT BUILD UP OF SMOKY HAZE IN THE CABIN THE QUICKLY DISSIPATED ON LANDING.  AIRCRAFT LANDED SAFELY IN ATL.  MAINTENANCE REMOVED AND REPLACED THE LEFT COALESCER SOCK AND DUCT TEMPERATURE SENSOR.  OPERATIONAL CHECKS NORMAL.  AIRCRAFT RETURNED TO SERVICE.  (M)

---
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.