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A CRJ200's APU fire/overheat warning system malfunctioned first indicating an overtemp; followed by a fire warning and then an APU fire fail alert. The APU fire bottle was fired; and an emergency declared.
| Attributes | |
| ACN | 998048 |
| Time | |
| Date | 201203 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | Regional Jet 200 ER/LR (CRJ200) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | APU Fire/Overheat Warning |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor |
Narrative:
Received C overtemp message. While running QRH that message went out and received APU fire message. Started running iai and fire message went out and got APU fire fail message. I was now not sure there was no fire and was not confident in the APU fire warning system; so I ran the iai; pressed APU fire switch and discharged the APU fire bottle.
Original NASA ASRS Text
Title: A CRJ200's APU FIRE/OVERHEAT warning system malfunctioned first indicating an OVERTEMP; followed by a FIRE warning and then an APU FIRE FAIL alert. The APU fire bottle was fired; and an emergency declared.
Narrative: Received C overtemp message. While running QRH that message went out and received APU fire message. Started running IAI and fire message went out and got APU fire fail message. I was now not sure there was no fire and was not confident in the APU fire warning system; so I ran the IAI; pressed APU fire switch and discharged the APU fire bottle.
Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.