Accident description
Last updated: 2 September 2014
Status:Final
Date:Monday 5 September 2005
Time:10:15
Type:Silhouette image of generic B732 model; specific model in this crash may look slightly different
Boeing 737-230
Operator:Mandala Airlines
Registration: PK-RIM
C/n / msn: 22136/783
First flight: 1981-07-20 (24 years 2 months)
Total airframe hrs:51599
Cycles:51335
Engines: 2 Pratt & Whitney JT8D-15
Crew:Fatalities: 5 / Occupants: 5
Passengers:Fatalities: 95 / Occupants: 112
Total:Fatalities: 100 / Occupants: 117
Ground casualties:Fatalities: 49
Airplane damage: Destroyed
Airplane fate: Written off (damaged beyond repair)
Location:Medan-Polonia Airport (MES) (   Indonesia) show on map
Crash site elevation: 35 m (115 feet) amsl
Phase: Initial climb (ICL)
Nature:Domestic Scheduled Passenger
Departure airport:Medan-Polonia Airport (MES/WIMM), Indonesia
Destination airport:Jakarta-Soekarno-Hatta International Airport (CGK/WIII), Indonesia
Flightnumber: 091
Narrative:
Mandala Airlines flight MDL 091, a Boeing 737-200 was to depart Medan-Polonia Airport (MES) for Jakarta-Soekarno-Hatta International Airport (CGK). The previous flight was from Jakarta and arrived at Medan uneventfully. The same crew have flight schedule on the same day and returned to Jakarta.
At 09:52 local time, MDL 091 asked for push back and start up clearance. After receiving the approval the air traffic controller the crew began starting the engines.
At 09:56, the controller cleared MDL 091 to taxi into position on runway 23 via taxiway Alpha. Six minutes later MDL 091 received clearance for take off with additional clearance from ATC to turn left heading 120° and maintain 1500 ft.
The airplane failed to become airborne and overran runway 23, impacting several approach lights. It traveled through a grass area and over a river, and impacted several buildings and vehicles before coming to rest on a road. A post crash fire destroyed much of the airplane.
One hundred passengers and crew members on board the plane died. Fifteen passengers seriously injured and two passengers (a mother and child) survived without any injuries. 49 persons on ground were killed and 26 people were seriously injured.
Medan-Polonia has a single 2900 x 45 meters asphalt runway (05/23).


The National Transportation Safety Committee determines that probable causes of this accident are:
- The aircraft took-off with improper take off configuration namely with retracted flaps and slats causing the aircraft failed to lift off.
- Improper checklist procedure execution had lead to failure to identify the flap in retract position.
- The aircraft’s take off warning horn was not heard on the CAM channel of the CVR. It is possible that the take-off configuration warning horn was not sounding.

Classification:
Wrong takeoff configuration (flaps/trim)
Loss of control

Sources:
» Antara
» NTSB
» Reuters
» Jakarta Post

Official accident investigation report
investigating agency: National Transportation Safety Committee (NTSC) - Indonesia
report status: Final
report number: KNKT/05.24/09.01.38
report released:01-JAN-2009
duration of investigation:1214 days (3 years 4 months)
download report: PT. Mandala Airlines; MDL 091 Boeing B737-200; PK-RIM; Jl. Jamin Ginting, Medan, North Sumatera 5 September 2005 (NTSC KNKT/05.24/09.01.38)
cover

Follow-up / safety actions

NTSC issued 8 Safety Recommendations

Show all AD's and Safety Recommendations

Photos

photo of Boeing 737-230 TF-ABY
TF-ABY was briefly leased to TunisAir and later that year (1994) sold to Mandala as PK-RIM.
Add your photo of this accident or aircraft
 

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 Medan-Polonia Airport to Jakarta-Soekarno-Hatta International Airport as the crow flies is 1388 km (867 miles).

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Boeing 737-200

  • 100th loss
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