Accident Overview
On a private mission to Kisumu, Eldoret, and back to Nairobi, a twin-engine aircraft registered 5Y-NJS, operated by Westwind Aviation Ltd, crashed at Ngong Racecourse. The flight had three occupants on board at the time of the accident. All three escaped unhurt, but the aircraft was destroyed.
Flight History
The aircraft departed Wilson Airport (HKNW) at 0420 UTC and landed at Kisumu Airport (HKKI) at 0502 UTC. It then departed HKKI for Eldoret International Airport (HKEL) at 1142 UTC, landing at 1200 UTC, where it picked up one passenger. The flight departed HKEL for HKNW at 1247 UTC with three occupants, estimating a flight time of 40 minutes.
Incident Sequence
According to preliminary information from the captain, the aircraft attained flight level 250 at 42 nautical miles from the Eldoret VOR. The flight was cleared by Nairobi Area Control Centre to fly directly to GV VOR. During descent to flight level 100, the aircraft encountered bad weather, and the wings developed heavy icing. The captain deployed the deicing systems, but the problem persisted. The captain requested Wilson Control to descend to the "Monstry fix" for landing at HKNW, which was approved.
As the flight continued descending, the left engine failed. The captain requested Wilson Tower for assistance. After 30 seconds, the right engine also failed. The captain elected to make an emergency landing at Ngong Racecourse.
Landing and Damage
On landing, the left wing collided with trees and broke off, separating together with the left engine and the left main landing gear. The aircraft turned clockwise through 180 degrees and faced the opposite direction. All three occupants escaped unhurt. The aircraft was destroyed.
Probable Cause
No probable cause was stated in the source.