ASN logo
Accident
Last updated: 22 October 2017
Statuts:Enquête Officielle
Date:samedi 14 mai 1977
Heure:09:33 UTC
Type/Sous-type:Silhouette image of generic B703 model; specific model in this crash may look slightly different
Boeing 707-321C
Opérant pour:IAS Cargo
Loué à :Dan-Air Services
Immatriculation: G-BEBP
Numéro de série: 18579/332
Année de Fabrication: 1963
Heures de vol:47621
Cycles:16723
Moteurs: 4 Pratt & Whitney JT3D-3B
Equipage:victimes: 5 / à bord: 5
Passagers:victimes: 1 / à bord: 1
Total:victimes: 6 / à bord: 6
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:3,7 km (2.3 milles) W of Lusaka Airport (LUN) (   Zambie)
Phase de vol: En approche (APR)
Nature:Cargo
Aéroport de départ:Nairobi International Airport (NBO/HKNA), Kénya
Aéroport de destination:Lusaka Airport (LUN/FLLS), Zambie
Détails:
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.

Probable Cause:

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


Opérations de secours

AAIB issued 4 Safety Recommendations

Show all AD's and Safety Recommendations

Photos

photo of Boeing 707-321C G-BEBP
Flight profile of G-BEBP
photo of Boeing 707-321C G-BEBP
Add your photo of this accident or aircraft
 

Plan
Ce plan montre l'aéroport de départ ainsi que la supposée destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Nairobi International Airport et Lusaka Airport est de 1806 km (1129 miles).
Accident location: Approximate; accuracy within a few kilometers.

Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tel qu'ils sont connus à ce jour.
languages: languages

Share

Boeing 707

  • 858 built
  • 59ème loss
  • 42ème accident fatal
  • le accident 27ème le plus grave (à ce moment là)
  • le accident 42ème le plus grave (en ce moment)
» safety profile

 Zambie
  • le accident 3ème le plus grave (à ce moment là)
  • le accident 5ème le plus grave (en ce moment)
» safety profile