ASN Wikibase Occurrence # 370351
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| Date: | Wednesday 11 August 2004 |
| Time: | 16:55 LT |
| Type: |  Boeing 777-236ER |
| Owner/operator: | British Airways |
| Registration: | G-VIID |
| MSN: | 27486/56 |
| Engine model: | General Electric GE90-85B |
| Fatalities: | Fatalities: 0 / Occupants: 129 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | Houston, TX -
 United States of America
|
| Phase: | Take off |
| Nature: | Passenger - Scheduled |
| Departure airport: | Houston, |
| London-Heathrow Airport (LHR) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
As the throttles were advanced for takeoff, the flightcrew heard a noise and felt a vibration from the left side of the airplane. As the airplane rotated, the crew received a cockpit warning of LH Eng Vibration - Level 5. During the climb, the crew observed smoke and haze in the cockpit and the cabin crew advised that the cabin was filling with smoke. The flightcrew declared an emergency and made an immediate landing and emergency evacuation. The investigation revealed that a turbine blade in the left engine had failed due to a fatigue crack and the resulting damage caused excessive vibration in the engine. As the engine continued to vibrate, an oil seal failed allowing oil to contaminate the bleed air and create smoke in the cockpit and cabin. The failed blade had been mis-marked with the wrong part number by the manufacturer, which allowed it to remain in service far in excess of it's life limit until the fatigue crack developed.
Probable Cause: the failure of a high pressure turbine blade which damaged an oil seal and allowed smoke to enter the cabin. Contributing to the blade failure was the mis-labeling of the blade's part number by the manufacturer, which allowed the blade to remain in service far in excess of it's life limit.
Accident investigation:
 |
|
Sources:
NTSB DCA04IA066
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 25-Mar-2024 09:48 | ASN Update Bot | Added |
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