Accident Boeing 707-321C G-BEBP,
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Date:Saturday 14 May 1977
Type:Silhouette image of generic B703 model; specific model in this crash may look slightly different    
Boeing 707-321C
Owner/operator:IAS Cargo
Registration: G-BEBP
MSN: 18579/332
Year of manufacture:1963
Total airframe hrs:47621 hours
Cycles:16723 flights
Engine model:Pratt & Whitney JT3D-3B
Fatalities:Fatalities: 6 / Occupants: 6
Aircraft damage: Destroyed, written off
Location:3,7 km W of Lusaka Airport (LUN) -   Zambia
Phase: Approach
Departure airport:Nairobi International Airport (NBO/HKNA)
Destination airport:Lusaka Airport (LUN/FLLS)
Investigating agency: AIB
Confidence Rating: Accident investigation report completed and information captured
The aircraft departed Nairobi (NBO) at 07:17 for the final leg of a London-Heathrow - Athens - Nairobi - Lusaka cargo flight. Boeing 707 G-BEBP proceeded to Lusaka at FL310. At 09:07 the flight was cleared to descend to FL110. This altitude was reached at 09:23, 37nm DME from Lusaka. A clearance was then given to descend further down to FL70 in 1000 feet steps. At 09:28 the co-pilot reported that the airfield was in sight. Lusaka then cleared the aircraft to descend to 6000 feet (2221 feet above runway elevation) and moments later a clearance was given to make a visual approach for runway 10. At 09:32 flaps were selected to 50 degrees. Suddenly, at 09:33, the complete right-hand horizontal stabilizer and elevator assembly were seen to separate in flight. The aircraft pitched rapidly nose down and dived vertically into the ground from a height of about 800 feet. The main wreckage was located 3660 m from the runway threshold.

CAUSE: "The accident was caused by a loss of pitch control following the in-flight separation of the right hand horizontal stabilizer and elevator as a result of a combination of metal fatigue and inadequate failsafe design in the rear spar structure. Shortcomings in design assessment, certification and inspection procedures were contributory factors.

Accident investigation:
Investigating agency: AIB
Report number: AAR 9/1978
Status: Investigation completed
Duration: 1 year and 9 months
Download report: Final report




photo (c) AAIB

photo (c) via Werner Fischdick; London-Heathrow Airport (LHR); October 1976

Revision history:


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