# SDR AU510001485

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 12, 2005
- Submitted: June 6, 2006
- Operation: General aviation
- Make and model: Boeing 747-400
- Registry model: [Boeing 747-400](https://openairdocs.org/model/boeing-747-400) (OpenAirDocs)
- System (JASC): [2170 · Humidity Control System](https://openairdocs.org/jasc/2170)
- Part: Humidifier
- Condition: Failed
- Location: Cabin Climate
- Stage of operation: CR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AU510001485

## Discrepancy

(AUS) SMOKE ON FLIGHT DECK WHEN HUMIDIFIER ACTIVATED. SMOKE STOPPED WHEN HUMIDIFIER SWITCHED OFF. AIRCRAFT IS FOREIGN REGISTERED. (OTHER CAUSE: UNKNOWN ) (CASA# 510001485)

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