Flugunfall 15 DEC 1985 einer Boeing 747-136 G-AWNE - Boston-Logan International Airport, MA (BOS)

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Status:	Accident investigation report completed and information captured
Datum:	Sonntag 15 Dezember 1985
Zeit:	14:50
Flugzeugtyp:	Boeing 747-136
Fluggesellschaft:	British Airways
Kennzeichen:	G-AWNE
Werknummer:	19765/109
Baujahr:	1971
Betriebsstunden:	55667
Besatzung:	Todesopfer: 0 / Insassen: 17
Fluggäste:	Todesopfer: 0 / Insassen: 252
Gesamt:	Todesopfer: 0 / Insassen: 269
Sachschaden:	schwer beschädigt
Konsequenzen:	Repaired
Unfallort:	Boston-Logan International Airport, MA (BOS) ( USA)
Flugphase:	Annäherung (APR)
Betriebsart:	Internationaler Linienflug
Flug von:	London-Heathrow Airport (LHR/EGLL), Großbritannien
Flug nach:	Boston-Logan International Airport, MA (BOS/KBOS), USA
Flugnummer:	BA215

Unfallbericht:
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

Accident investigation:

Investigating agency:	NTSB
Status:	Investigation completed
Duration:	1 year and 7 months
Accident number:	NTSB/AAR-87/02/SUM
Download report:	Summary report

Informationsquelle:

» NTSB

Sicherheitsempfehlungen

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).

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.

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Issued: 09-JAN-1986	To: FAA	A-86-1
ISSUE AN AIRWORTHINESS DIRECTIVE TO REQUIRE AN IMMEDIATE INSPECTION OF ALL BOEING 747 AIRPLANES HAVING AN APPROPRIATE MINIMUM NUMBER OF OPERATING CYCLES TO VERIFY THAT ALL BOLTS FOR THE NOS. 1 THROUGH 3 AND NOS. 6 THROUGH 8 FLAP TRACK FORWARD ATACHMENT FITTINGS ARE TORQUED ADEQUATELY. IF ANY OF THE BOLTS ARE BROKEN OR ARE NOT TORQUED ADEQUATELY, ALL OF THE BOLTS FROM THE FORWARD ATTACHMENT FITTING WITH THE BROKEN OR UNDERTORQUED BOLT SHOULD BE REMOVED AND INSPECTED BY AN FAA-APPROVED METHOD AND THE BOLTS FOR THE OTHER ATTACHMENTS OF THE AFFECTED FLAP TRACK SHOULD BE INSPECTED FOR ADEQUATE TORQUE BEFORE FURTHER FLIGHT. (Closed - Acceptable Action)
Issued: 09-JAN-1986	To: FAA	A-86-2
BASED ON INFORMATION GAINED BY THE INSPECTION PROGRAM DETAILED IN SAFETY RECOMMENDATION A-86-1, DETERMINE AN APPROPRIATE INTERVAL FOR CHECKING THE BOLT TORQUE, AND DEFINE PERIODIC REINSPECTION REQUIREMENTS IN AN AIRWORTHINESS DIRECTIVE. (Closed - Acceptable Action)
Issued: 09-JAN-1986	To: FAA	A-86-3
NOTIFY FOREIGN GOVERNMENTS WITH OPERATORS OF BOEING 747 AIRPLANES OF THE CIRCUMSTANCES OF THE ACCIDENT INVOLVING THE BRITISH AIRWAYS BOEING 747-136 ON DECEMBER 15, 1985, IN BOSTON, MASSACHUSETTS, AND OF ANY ACTION TAKEN AS A RESULT OF THE ACCIDENT. (Closed - Acceptable Action)