42 Years ago today: On 14 May 1977 an IAS Cargo Boeing 707-321C crashed on approach to Lusaka following a fatigue failure of the stabilizer, killing all 6 crew.
|Date:||Saturday 14 May 1977|
|Operating for:||IAS Cargo|
|Leased from:||Dan-Air Services|
|C/n / msn:||18579/332|
|Total airframe hrs:||47621|
|Engines:||4 Pratt & Whitney JT3D-3B|
|Crew:||Fatalities: 5 / Occupants: 5|
|Passengers:||Fatalities: 1 / Occupants: 1|
|Total:||Fatalities: 6 / Occupants: 6|
|Aircraft fate:||Written off (damaged beyond repair)|
|Location:||3,7 km (2.3 mls) W of Lusaka Airport (LUN) ( Zambia)|
|Departure airport:||Nairobi International Airport (NBO/HKNA), Kenya|
|Destination airport:||Lusaka Airport (LUN/FLLS), Zambia|
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 fail safe design in the rear spar structure. Shortcomings in design assessment, certification and inspection procedures were contributory factors.