Accident Boeing 747-136 G-AWNE, Sunday 15 December 1985
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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
Owner/operator:British Airways
Registration: G-AWNE
MSN: 19765/109
Year of manufacture:1971
Total airframe hrs:55667 hours
Fatalities:Fatalities: 0 / Occupants: 269
Other fatalities:0
Aircraft damage: Substantial, repaired
Category:Accident
Location:Boston-Logan International Airport, MA (BOS) -   United States of America
Phase: Approach
Nature:Passenger - Scheduled
Departure airport:London-Heathrow Airport (LHR/EGLL)
Destination airport:Boston-Logan International Airport, MA (BOS/KBOS)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
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:
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

Accident investigation:
cover
  
Investigating agency: NTSB
Report number: NTSB/AAR-87/02/SUM
Status: Investigation completed
Duration: 1 year and 6 months
Download report: Final report

Sources:

NTSB

Location

Revision history:

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