Covering form of preliminary or final report

Date of event :	2010-09-03
Incident number :
Report :	Final report
Place of event :	MUAN INT AIRPORT
Registration mark :	Serious incident
Weight category MTOM: :	>5700 kg
Type of operation :	Commercial and Air Transport
Plane / SFM :	Airplanes
Type of plane / SFM :	L 410 UVP-E20
Health effects of event :	Without injury
PDF document :

Description:

ARAIB AIR 1005 EN

On 3 September 2010 at about 09:31, the L410UVP20 aircraft (hereinafter referred to as "HL5234") of Ace Air, Ltd. (hereinafter referred to as "Ace Air"), which was an unscheduled passenger airliner that departed Gimpo International Airport, excursed to the left of runway 19 during landing roll at Muan International Airport (hereinafter referred to as "Muan Airport"). Aboard the aircraft were one captain, one copilot and two passengers (including one free of charge), and there was no personnel injury nor damage to the aircraft.

The Aviation and Railway Accident Investigation Board (hereinafter be referred to as "ARAIB") determines as the cause of this incident that when the flight crew members moved both thrust control levers (TCL) to the reverse thrust position to use reverse thrust after aircraft touchdown, they did not set both propeller control levers (PCL) at the fine position as specified in the Flight Manual but moved them to the feather position, so reverse thrust was generated at the right propeller but not at the left propeller, thereby producing asymmetry between left and right thrust.