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Last updated: 15 June 2019
Status:Final
Date:Sunday 15 December 1985
Time:14:50
Type:Silhouette image of generic B741 model; specific model in this crash may look slightly different
Boeing 747-136
Operator:British Airways
Registration: G-AWNE
C/n / msn: 19765/109
First flight: 1971
Total airframe hrs:55667
Crew:Fatalities: 0 / Occupants: 17
Passengers:Fatalities: 0 / Occupants: 252
Total:Fatalities: 0 / Occupants: 269
Aircraft damage: Substantial
Aircraft fate: Repaired
Location:Boston-Logan International Airport, MA (BOS) (   United States of America)
Phase: Approach (APR)
Nature:International Scheduled Passenger
Departure airport:London-Heathrow Airport (LHR/EGLL), United Kingdom
Destination airport:Boston-Logan International Airport, MA (BOS/KBOS), United States of America
Narrative:
Approximately 16 ft of the left inboard trailing edge flap separated while the aircraft was on final approach to land at Boston-Logan Airport. The approach and landing were completed without further incident. Investigation revealed 5 of the 8 bolts which hold the no. 3 flap track forward attach fitting to the wing showed signs of fatigue and the 3 remaining bolts showed overload type failures. No inspection requirements for the forward attachment bolts were required by Boeing at the time of the accident.

Probable Cause:

PROBABLE CAUSE:
flight control,flap attachment..fatigue

CONTRIBUTING FACTORS:
flight control,flap attachment..failure,partial
acft/equip,inadequate airframe..manufacturer
insufficient standards/requirements,manufacturer..manufacturer
maintenance..inadequate..manufacturer
maintenance,inspection..inadequate..manufacturer

Classification:

Sources:
» NTSB


Follow-up / safety actions

NTSB issued 3 Safety Recommendations

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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from London-Heathrow Airport to Boston-Logan International Airport, MA as the crow flies is 5201 km (3251 miles).

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