Accident description
Last updated: 23 April 2014
Status:Final
Date:Monday 10 June 2013
Time:09:54
Type:Silhouette image of generic MA60 model; specific model in this crash may look slightly different
Xian MA60
Operator:Merpati Nusantara Airlines
Registration: PK-MZO
C/n / msn: 0608
First flight: 2010
Total airframe hrs:4486
Cycles:4133
Engines: 2 Pratt & Whitney Canada PW127J
Crew:Fatalities: 0 / Occupants: 4
Passengers:Fatalities: 0 / Occupants: 46
Total:Fatalities: 0 / Occupants: 50
Airplane damage: Substantial
Airplane fate: Written off (damaged beyond repair)
Location:Kupang-Eltari Airport (KOE) (   Indonesia) show on map
Phase: Landing (LDG)
Nature:Domestic Scheduled Passenger
Departure airport:Bajawa Airport (BJW/WATB), Indonesia
Destination airport:Kupang-Eltari Airport (KOE/WATT), Indonesia
Flightnumber:6517
Narrative:
A Xian MA60 passenger plane, PK-MZO, sustained substantial damage in a hard landing accident at Kupang-Eltari Airport, Indonesia. There were 46 passengers and 4 crew members on board. Four passengers and one crew member sustained serious injuries.
The Xian MA-60 operated on a scheduled domestic passenger flight from Bajawa Airport (BJW) to Kupang (KOE). There were 46 passengers and four crew members on board. The flight from the departure until commencing for approach was uneventful. The weather at Kupang was fine and a visual approach was flown to runway 07.
During the approach, the power lever lock was selected to open position in accordance with the operator's normal checklist. and remained in that position. The autopilot was disconnected while descending trough 1100 feet. At that point the airplane was just above the 2.9░ approach angle.
The first officer, who had 117 hours on the MA-60, had the habit of delaying the movement of the power levers to the Ground Idle position during landing. He then possibly tried to prove that he had overcome the error by operating the power lever stop slot during approach and unintentionally moved the power lever beyond flight idle. The left power lever was moved in the range of Beta Mode while the aircraft altitude was approximately 112 ft and followed by the right power lever at 90 ft. The airplane lost altitude quickly and touched down at a vertical acceleration on impact of 5.99 G. The wing separated from the fuselage and both underwing engines tilted forward, contacting the runway surface. The airplane came to rest after sliding 200 m down the runway. There was no fire. Five occupants sustained serious injuries.


Contributing Factors:
- The procedure of selecting Power Lever Lock to "OPEN" during approach was made without comprehensive risk assessment.
- Both power levers entered BETA MODE at 90 feet due to the safety device namely Power Lever Lock has been opened during approach, which was in accordance to the operator procedure and lifting of Mechanical Power Lever Stop Slot which was not realized by the pilots.
- The movement of power levers to BETA MODE resulted the pitch angle changed to low pitch angle which produced significant drag and made the aircraft loss of significant lift.

Events:


Sources:
» Ministry of Transportation, Indonesia

Official accident investigation report
investigating agency: National Transportation Safety Committee (NTSC) - Indonesia
report status: Final
report number: KNKT 13.06.19.04
report released:10-JUL-2013
duration of investigation:30 days (1 month)
download report: Merpati Nusantara Airlines Xian Aircraft Industry MA60; PK-MZO El Tari Airport, Kupang Republic of Indonesia 10 June 2013 (NTSC KNKT 13.06.19.04)
cover

Photos

photo of Xian MA60 PK-MZO
photo of Xian MA60 PK-MZO
photo of Xian MA60 PK-MZO
photo of Xian MA60 PK-MZO
photo of Xian MA60 PK-MZO
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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Bajawa Airport to Kupang-Eltari Airport as the crow flies is 328 km (205 miles).

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