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A maintenance controller reported that a #2 dc generator caution light on a dhc-8-100 aircraft had illuminated in flight; was showing no loads and would not reset. The generator was found to have left its mounting pad and sheared the generator shaft. The v-band clamp was in place; but reported cocked.
| Attributes | |
| ACN | 1028671 |
| Time | |
| Date | 201208 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Dash 8-100 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | DC Generator |
| Person 1 | |
| Function | Other / Unknown |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
Another maintenance controller took a call from a [flight] crew stating the #2 dc generator caution light had illuminated in flight; was showing no loads and would not reset. Upon arrival at ZZZ the problem was investigated and the generator was found to have left its mounting pad and sheared its shaft. The v-band clamp was in place; but was reported to have been cocked. The generator had been changed in ZZZ1 the previous evening. Generator went off-line and would not reset. ZZZ line maintenance reported generator was not secured and shaft was sheared. Don't know [why]. Generator was removed; gearing; garlock seal and mounting pad were inspected along with inspections required by the generator removal and replacement (right/right) workcard. Also generator control unit (gcu) was replaced and engine condition panel was checked for flags.
Original NASA ASRS Text
Title: A Maintenance Controller reported that a #2 DC Generator Caution light on a DHC-8-100 aircraft had illuminated in flight; was showing no loads and would not reset. The Generator was found to have left its mounting pad and sheared the Generator shaft. The V-Band clamp was in place; but reported cocked.
Narrative: Another Maintenance Controller took a call from a [flight] crew stating the #2 DC Generator caution light had illuminated in flight; was showing no loads and would not reset. Upon arrival at ZZZ the problem was investigated and the Generator was found to have left its mounting pad and sheared its shaft. The V-band clamp was in place; but was reported to have been cocked. The Generator had been changed in ZZZ1 the previous evening. Generator went Off-Line and would not reset. ZZZ Line Maintenance reported Generator was not secured and shaft was sheared. Don't know [why]. Generator was removed; gearing; Garlock seal and mounting pad were inspected along with inspections required by the Generator Removal and Replacement (R/R) workcard. Also Generator Control Unit (GCU) was replaced and engine condition panel was checked for flags.
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.