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A canadair CL65 in cruise at FL310 declared an emergency due to APU oil temperature warning. APU required due to right generator inoperative.
| Attributes | |
| ACN | 539750 |
| Time | |
| Date | 200202 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : zzz.artcc |
| State Reference | US |
| Altitude | msl single value : 31000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet CL65, Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 7900 flight time type : 1900 |
| ASRS Report | 539750 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : apu oil temp caution warn other flight crewa other flight crewb |
| Resolutory Action | flight crew : declared emergency |
| Consequence | other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Chart Or Publication Aircraft |
| Primary Problem | Aircraft |
Narrative:
Right generator on aircraft was written up and deferred because it occasionally tripped off line on the ground. Per the MEL, the APU remained on during flight to provide a back-up generator. An APU oil temperature caution illuminated in cruise flight. Our company flight manual said to shut down the APU if it was not essential -- or if it was essential, the APU was to stay on and a landing made at the nearest suitable airport. After coordination with dispatch and maintenance, it was agreed that ZZZ (our destination) was the nearest suitable field. An emergency was declared. The landing at ZZZ was uneventful. Although there were other airports closer mileage-wise than ZZZ, I felt that it would take more time to coordination a change in destination than it would take to continue to ZZZ. Also, I knew the WX was fairly good at ZZZ and that they had fire and rescue if needed.
Original NASA ASRS Text
Title: A CANADAIR CL65 IN CRUISE AT FL310 DECLARED AN EMER DUE TO APU OIL TEMP WARNING. APU REQUIRED DUE TO R GENERATOR INOP.
Narrative: R GENERATOR ON ACFT WAS WRITTEN UP AND DEFERRED BECAUSE IT OCCASIONALLY TRIPPED OFF LINE ON THE GND. PER THE MEL, THE APU REMAINED ON DURING FLT TO PROVIDE A BACK-UP GENERATOR. AN APU OIL TEMP CAUTION ILLUMINATED IN CRUISE FLT. OUR COMPANY FLT MANUAL SAID TO SHUT DOWN THE APU IF IT WAS NOT ESSENTIAL -- OR IF IT WAS ESSENTIAL, THE APU WAS TO STAY ON AND A LNDG MADE AT THE NEAREST SUITABLE ARPT. AFTER COORD WITH DISPATCH AND MAINT, IT WAS AGREED THAT ZZZ (OUR DEST) WAS THE NEAREST SUITABLE FIELD. AN EMER WAS DECLARED. THE LNDG AT ZZZ WAS UNEVENTFUL. ALTHOUGH THERE WERE OTHER ARPTS CLOSER MILEAGE-WISE THAN ZZZ, I FELT THAT IT WOULD TAKE MORE TIME TO COORD A CHANGE IN DEST THAN IT WOULD TAKE TO CONTINUE TO ZZZ. ALSO, I KNEW THE WX WAS FAIRLY GOOD AT ZZZ AND THAT THEY HAD FIRE AND RESCUE IF NEEDED.
Data retrieved from NASA's ASRS site as of July 2007 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.