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Accident description
Last updated: 24 March 2017
Status:Final
Date:Friday 2 October 2015
Time:14:49
Type:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different
de Havilland Canada DHC-6 Twin Otter 300
Operator:Aviastar Mandiri
Registration: PK-BRM
C/n / msn: 741
First flight: 1981
Total airframe hrs:45242
Cycles:75241
Engines: 2 Pratt & Whitney Canada PT6A-27
Crew:Fatalities: 2 / Occupants: 2
Passengers:Fatalities: 8 / Occupants: 8
Total:Fatalities: 10 / Occupants: 10
Airplane damage: Destroyed
Airplane fate: Written off (damaged beyond repair)
Location:Bajaja Mount, District of Luwu, South Sulawesi (   Indonesia)
Crash site elevation: 2357 m (7733 feet) amsl
Phase: En route (ENR)
Nature:Domestic Scheduled Passenger
Departure airport:Masamba/Andi Jemma Airport (MXB/WAWM), Indonesia
Destination airport:Makassar-Sultan Hasanuddin International Airport (UPG/WAAA), Indonesia
Flightnumber:MV7503
Narrative:
The DHC-6 Twin Otter, registered PK-BRM was being operated by Aviastar Mandiri as a scheduled passenger flight with flight number MV7503. The aircraft departed from Masamba/Andi Jemma Airport intended destination to Makassar-Sultan Hasanuddin International Airport on the island of South Sulawesi in Indonesia.
The pilot-in-command acted as Pilot Flying while the second-in-command acted as pilot monitoring.
According to the flight plan clearance issued by Andi Jemma Airport Air Traffic Information Service (ATIS) the pilot intended to fly VFR with altitude of 8000 feet and fly a direct route from Masamba to Makassar.
The aircraft departed from Masamba at 06:25 UTC (14:25 LT) and estimated time of arrival Makassar at 07:39 UTC.
A partial cloud formation was present at about 60 nautical miles from Masamba on the direct track to Makassar around Mount Bajaja and Mount Latimojong.
At 06:36 UTC, the pilot informed the Ujung Pandang Information officer that the aircraft had reached 8,000 feet. One minute later the pilots discussed to fly direct to Barru from their current position. Barru is a town located at about 45 Nm north of Makassar. Both pilots agreed to fly direct and the second-in-command (SIC) explained the experience of flying direct on the flight before. A few seconds later the SIC suggested to delay the direct flight for a while. At 06:50 UTC, the PIC told the SIC that he wanted to climb and the CVR stopped recording. The aircraft impacted treetops and crashed on the top of a mountain at an elevation of 7734 feet.
The wreckage was located on Bajaja Mount on October 5.

Probable Cause:

Contributing Factors: "Deviation from the company visual route without properly considering the elevated risks of cruising altitude lower than the highest terrain and instrument meteorological condition in addition with the absence of the EGPWS warning resulted in the omission of avoidance actions."

Classification:
VFR flight in IMC
Controlled Flight Into Terrain (CFIT) - Mountain

Sources:

Official accident investigation report
cover
investigating agency: National Transportation Safety Committee (NTSC) - Indonesia
report status: Final
report number: KNKT 15.10.21.04
report released:4 January 2017
duration of investigation: 1 year and 3 months
download report: KNKT 15.10.21.04

Follow-up / safety actions

NTSC issued 4 Safety Recommendations

Show all AD's and Safety Recommendations

Photos

photo of de Havilland Canada DHC-6 Twin Otter 300 PK-BRM
photo of de Havilland Canada DHC-6 Twin Otter 300 PK-BRM
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Aircraft history
date registration operator remarks
Feb 1981 C-GRBY de Havilland Canada first flight
12 March 1981 C-GRBY NorOntair delivered
31 March 1981 C-GRBY Air-Dale
10 July 1996 C-GRBY NorOntair returned
30 January 1997 P2-MCF Milne Bay Air
April 2001 P2-MCF Airlines PNG new name
March 2015 PK-BRM Aviastar Mandiri

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 Masamba/Andi Jemma Airport to Makassar-Sultan Hasanuddin International Airport as the crow flies is 290 km (181 miles).

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