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B757-200 diverts to nearest suitable airport after disconnecting a vibrating generator drive which resulted in a large 'bump.'
| Attributes | |
| ACN | 804847 |
| Time | |
| Date | 200809 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 30000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 210 flight time total : 5600 flight time type : 3822 |
| ASRS Report | 804847 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : eicas l. gen drive |
| Resolutory Action | flight crew : declared emergency flight crew : diverted to another airport |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
On climb out; captain was hand flying and reported feeling a rumbling through the flight controls. At FL300 the left generator drive EICAS light came on with the light in the overhead switch. Ran checklist and disconnected the generator drive. Large bump was felt at point of disconnect and rumbling feeling went away. Diverted to nearest suitable at that time which was ZZZ. Captain used emergency authority/authorized for slight overweight landing (1900 pounds) and declared an emergency with no assistance required. Uneventful landing and taxi in. Cabin and flight deck crew debriefed after deplaning.
Original NASA ASRS Text
Title: B757-200 DIVERTS TO NEAREST SUITABLE ARPT AFTER DISCONNECTING A VIBRATING GENERATOR DRIVE WHICH RESULTED IN A LARGE 'BUMP.'
Narrative: ON CLBOUT; CAPT WAS HAND FLYING AND RPTED FEELING A RUMBLING THROUGH THE FLT CTLS. AT FL300 THE L GENERATOR DRIVE EICAS LIGHT CAME ON WITH THE LIGHT IN THE OVERHEAD SWITCH. RAN CHKLIST AND DISCONNECTED THE GENERATOR DRIVE. LARGE BUMP WAS FELT AT POINT OF DISCONNECT AND RUMBLING FEELING WENT AWAY. DIVERTED TO NEAREST SUITABLE AT THAT TIME WHICH WAS ZZZ. CAPT USED EMER AUTH FOR SLIGHT OVERWT LNDG (1900 LBS) AND DECLARED AN EMER WITH NO ASSISTANCE REQUIRED. UNEVENTFUL LNDG AND TAXI IN. CABIN AND FLT DECK CREW DEBRIEFED AFTER DEPLANING.
Data retrieved from NASA's ASRS site as of May 2009 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.