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An medium large transport air carrier crew lost an engine driven alternator due to high CSD temperature. The APU would not start, so they landed at an en route station.
| Attributes | |
| ACN | 214695 |
| Time | |
| Date | 199207 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : slc |
| State Reference | UT |
| Altitude | msl bound lower : 19000 msl bound upper : 37000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zlc |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other descent other landing other |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 11500 flight time type : 700 |
| ASRS Report | 214695 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : declared emergency none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
En route from pdx to den, level at constant speed drive FL370, just past boise VOR we noticed the #1 CSD outlet temperature was in the red band. We followed the constant speed drive temperature high abnormal checklist. We descended down to the low twenties, then high teens to put the APU in its respective start envelope. Numerous APU start attempts failed. Even though the #1 generator bus was off the line, the constant speed drive temperature continued to climb, and with no way to back up the #1 generator bus, we decided to call maintenance flight control. They advised us to disconnect the #1 constant speed drive and, because we were now down to only 1 generator, to divert into slc. We agreed and complied with flight control. We followed company operational procedures and FARS. Logbook entries were made.
Original NASA ASRS Text
Title: AN MLG ACR CREW LOST AN ENG DRIVEN ALTERNATOR DUE TO HIGH CSD TEMP. THE APU WOULD NOT START, SO THEY LANDED AT AN ENRTE STATION.
Narrative: ENRTE FROM PDX TO DEN, LEVEL AT CONSTANT SPD DRIVE FL370, JUST PAST BOISE VOR WE NOTICED THE #1 CSD OUTLET TEMP WAS IN THE RED BAND. WE FOLLOWED THE CONSTANT SPD DRIVE TEMP HIGH ABNORMAL CHKLIST. WE DSNDED DOWN TO THE LOW TWENTIES, THEN HIGH TEENS TO PUT THE APU IN ITS RESPECTIVE START ENVELOPE. NUMEROUS APU START ATTEMPTS FAILED. EVEN THOUGH THE #1 GENERATOR BUS WAS OFF THE LINE, THE CONSTANT SPD DRIVE TEMP CONTINUED TO CLB, AND WITH NO WAY TO BACK UP THE #1 GENERATOR BUS, WE DECIDED TO CALL MAINT FLT CTL. THEY ADVISED US TO DISCONNECT THE #1 CONSTANT SPD DRIVE AND, BECAUSE WE WERE NOW DOWN TO ONLY 1 GENERATOR, TO DIVERT INTO SLC. WE AGREED AND COMPLIED WITH FLT CTL. WE FOLLOWED COMPANY OPERATIONAL PROCS AND FARS. LOGBOOK ENTRIES WERE MADE.
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.