Incident Overview

Date: Wednesday 22 August 2012
Aircraft Type: Let L-410UVP-E9
Owner/operator: Mombasa Air Safari
Registration Number: 5Y-UVP
Location: Ngerende Airstrip, Masai Mara Game Reserve – ÿ Kenya
Phase of Flight: Take off
Status: Destroyed, written off
Casualties: Fatalities: 4 / Occupants: 13
Component Affected: Second Engine PropellerSecond Engine Propeller
Investigating Agency: AAID KenyaAAID Kenya
Category: Accident
A fatal aviation incident occurred when a Let L-410UVP passenger plane crashed at the Ngorte Airstrip in the Masai Mara Game Reserve. The aircraft, operating from Mombasa-Moi International Airport (HKMO), was en route to Ukundu, Ambozeli, Mara North, Olkiombo (HKOK), and ultimately back to Mombasa. After takeoff from Ngorte Airstrip, the plane landed at the airstrip with 13 passengers, and subsequently took off with a remaining crew and 11 passengers. A leftward veering occurred, resulting in impact with terrain, approximately 310 meters from the runway end. Two pilots and two passengers perished. Three passengers sustained serious injuries, while the remaining six sustained minor injuries. The fuel control unit of the second engine was contaminated, and the propeller was feathered. Investigation revealed a possible issue with the second engine’s power output during the impact, with the propeller being in feathering conditions. Insufficient oversight was identified regarding the operator’s staffing levels.A fatal aviation incident occurred when a Let L-410UVP passenger plane crashed at the Ngorte Airstrip in the Masai Mara Game Reserve. The aircraft, operating from Mombasa-Moi International Airport (HKMO), was en route to Ukundu, Ambozeli, Mara North, Olkiombo (HKOK), and ultimately back to Mombasa. After takeoff from Ngorte Airstrip, the plane landed at the airstrip with 13 passengers, and subsequently took off with a remaining crew and 11 passengers. A leftward veering occurred, resulting in impact with terrain, approximately 310 meters from the runway end. Two pilots and two passengers perished. Three passengers sustained serious injuries, while the remaining six sustained minor injuries. The fuel control unit of the second engine was contaminated, and the propeller was feathered. Investigation revealed a possible issue with the second engine’s power output during the impact, with the propeller being in feathering conditions. Insufficient oversight was identified regarding the operator’s staffing levels.

Description

A Let L-410UVP passenger plane, operated by Mombasa Air Safari, crashed at the Ngerende Airstrip in the Masai Mara Game Reserve. The aircraft had taken-off from Mombasa-Moi International Airport (HKMO), with an intended flight plan to Ukunda, then Amboseli Airstrip, then proceed to Ngerende Airstrip, Mara North, Olkiombo (HKOK), Mara North, Ukunda Airport (HKUK) and finally return to Mombasa. After the first leg to Amboseli Airstrip, It landed at Ngerende Airstrip at 12:11, disembarking 6 passengers. The aircraft then took off from Ngerende Airstrip with 13 souls on board, 2 crew and 11 passengers, after a short stopover. The airplane veered left and impacted terrain 310 meters from the end of runway 28. Two pilots and two passengers died. Three passengers sustained serious injuries. The other six passengers sustained minor injuries. It appeared that the Fuel Control Unit of the no. 2 engine was contaminated. The prop was feathered. Conclusions: – LH engine was most probably not developing power at the time of impact – LH engine propeller was most probably in feather at the time of impact – Both CVR and FDR were unserviceable at the time of the accident – AAID was unable to determine origin of contaminant found in LH engine FCU – Sufficient oversight was not exercised over the Operator – High turnover of the Operator’s staff

Source of Information

http://www.standardmedia.co.ke/?articleID=2000064558, http://www.nation.co.ke/News/Three+dead+in+Mara+plane+crash/-/1056/1484818/-/jo9nok/-/index.htmlhttp://www.standardmedia.co.ke/?articleID=2000064558, http://www.nation.co.ke/News/Three+dead+in+Mara+plane+crash/-/1056/1484818/-/jo9nok/-/index.html

Primary Cause

Fuel Contamination of the second engine’s fuel control unit.Fuel Contamination of the second engine’s fuel control unit.

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