Crash of a De Havilland DHC-6 Twin Otter 400 near Kampung Mamontoga: 4 killed

Date & Time: Sep 18, 2019 at 1100 LT
Operator:
Registration:
PK-CBC
Flight Phase:
Flight Type:
Survivors:
No
Site:
Schedule:
Timika - Ilaga
MSN:
950
YOM:
2016
Country:
Region:
Crew on board:
3
Crew fatalities:
Pax on board:
1
Pax fatalities:
Other fatalities:
Total fatalities:
4
Circumstances:
The twin engine airplane departed Timika Airport at 1036LT on a cargo flight to Ilaga, carrying one passenger, a crew of four and a load of 1,7 ton of rice. At 1054LT, the crew gave his ETA at Ilaga Airport when the contact was lost about six minutes later. As the airplane failed to arrive at destination, SAR operations were initiated. The wreckage was found four days later in a mountainous terrain, at an altitude of 4,115 meters, about 10 km from Kampung Mamontoga. The aircraft was totally destroyed and all four occupants were killed.

Crash of a De Havilland DHC-4T Caribou near Ilaga: 4 killed

Date & Time: Oct 31, 2016 at 0830 LT
Type of aircraft:
Registration:
PK-SWW
Flight Phase:
Flight Type:
Survivors:
No
Site:
Schedule:
Timika - Ilaga
MSN:
303
YOM:
1972
Country:
Region:
Crew on board:
4
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
4
Circumstances:
The twin turbo Caribou left Timika at 0757LT on a cargo flight to Ilaga, carrying four crew members and a load of construction materials. While approaching the Ilaga Pass and flying at an altitude of about 3,650 meters, the aircraft hit the slope of a mountain and disintegrated on impact. The wreckage was found a day later about 12 km south of the intended destination. All four occupants have been killed.

Crash of a Pilatus PC-6 Turbo Porter in Mulia: 11 killed

Date & Time: Apr 17, 2009 at 1015 LT
Operator:
Registration:
PK-LTJ
Flight Phase:
Survivors:
No
Site:
Schedule:
Ilaga - Mulia
MSN:
959
YOM:
2008
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
9
Pax fatalities:
Other fatalities:
Total fatalities:
11
Captain / Total flying hours:
2664
Captain / Total hours on type:
1412.00
Aircraft flight hours:
542
Circumstances:
On the morning of 17 April 2009, a Pilatus PC-6/B2-H4 Turbo Porter aircraft, registered PK-LTJ, operated by PT. Mimika Air, charter flight from Ilaga to Mulia in the Puncak Jaya District of Papua. The Mimika Local Government owned the aircraft. There were 11 people on board; one pilot, one observer, and nine passengers comprised of eight adults and one infant. The aircraft was also carrying National Government election boxes. The flight in accordance with the visual flight rules was estimated to take 18 minutes. There was no record of communication with the aircraft during the flight. Two minutes after the estimated time of arrival, when the Porter had not arrived, a search was commenced. On 18 April, search aircraft located the wreckage of the Porter at an elevation of about 12,000 feet on Mt Gergaji. The location was on the direct track between Ilaga and Mulia. The aircraft impacted the ground in an inverted attitude, and was destroyed by the impact forces and the post-impact fire. All occupants were fatally injured. The weather in the valleys along the route was mostly clear, with cloud on the mountains. The route flown by the pilot was the direct track, which passed over a mountain range, with a high peak adjacent to, and west of the track at about the midway point, at 13,700 feet. The investigation determined that it was likely that the pilot had flown the aircraft into cloud and lost control of the aircraft in instrument meteorological conditions. The impact signature was consistent with uncontrolled flight at the time of impact. This probably resulted from the pilot becoming spatially disoriented after entering cloud.
Probable cause:
The pilot may not have had adequate knowledge of the route and weather conditions, and may have been relying on Global Positioning System navigation, and was attempting to climb on the direct track over Mt Gergaji. It was likely that the pilot became spatially disoriented after entering cloud while operating under visual flight procedures, leading to a loss of control and uncontrolled impact with terrain.
Final Report:

Crash of a De Havilland DHC-6 Twin Otter in Indonesia: 12 killed

Date & Time: Nov 17, 2006 at 0800 LT
Operator:
Registration:
PK-YPY
Flight Phase:
Survivors:
No
Site:
Schedule:
Mulia-Ilaga
MSN:
535
YOM:
1977
Country:
Region:
Crew on board:
3
Crew fatalities:
Pax on board:
9
Pax fatalities:
Other fatalities:
Total fatalities:
12
Circumstances:

The aircraft was making a special flight from Mulia to Ilaga for the regency administration to visit several districts in the Irian Jaya region. While flying at 10,500 feet, the aircraft struck the peak of Puncak Jaya. Rescue teams found the debris of the aircraft the next day. All 12 occupants were killed.

Crash of a De Havilland DHC-6 Twin Otter in Ilaga

Date & Time: Sep 30, 1996 at 1215 LT
Operator:
Registration:
PK-YPF
Survivors:
Yes
MSN:
210
YOM:
1969
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
3
Pax fatalities:
Other fatalities:
Total fatalities:
0