Crash of a De Havilland DHC-6 Twin Otter 300 on Mt Latimojong: 10 killed

Date & Time: Oct 2, 2015 at 1515 LT
Operator:
Registration:
PK-BRM
Flight Phase:
Survivors:
No
Site:
Schedule:
Masamba – Makassar
MSN:
741
YOM:
1981
Flight number:
VIT7503
Country:
Region:
Crew on board:
3
Crew fatalities:
Pax on board:
7
Pax fatalities:
Other fatalities:
Total fatalities:
10
Circumstances:
The twin engine aircraft left Masamba-Andi Jemma Airport at 1425LT for a flight to Makassar with an ETA at 1539LT. Contact was lost around 1515LT when the aircraft was cruising at his assigned altitude of 8,000 feet in the center of South Sulawesi. The wreckage was eventually spotted on October 5. It appears the aircraft hit tree tops and apparently crashed in a mountainous area, near Mount Latimojong. The aircraft was destroyed and all 10 occupants were killed.

Crash of a De Havilland DHC-6 Twin Otter 200 in Dubai

Date & Time: Oct 2, 2015
Operator:
Registration:
DU-SD4
Flight Type:
Survivors:
Yes
Schedule:
Dubai - Dubai
MSN:
132
YOM:
1968
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Following an uneventful skydiving mission over the Dubai Drop Zone, the pilot was returning to his base when upon landing on runway 06, the aircraft veered off runway to the left, hit an embankment and came to rest with the right wing sheared off. While the pilot was unhurt, the aircraft appears to be written off.

Crash of a De Havilland DHC-6 Twin Otter 200 in Louisburg

Date & Time: Sep 6, 2015 at 1540 LT
Operator:
Registration:
N181CS
Flight Phase:
Survivors:
Yes
Schedule:
Washington - Louisburg
MSN:
181
YOM:
1968
Crew on board:
2
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
7337
Captain / Total hours on type:
1058.00
Copilot / Total flying hours:
3187
Copilot / Total hours on type:
1180
Aircraft flight hours:
26915
Circumstances:
The airline transport pilot was conducting a cross-country aerial observation flight in the multiengine airplane. The pilot reported that the airplane was on the final leg of the traffic pattern when he reduced the power levers for landing and noticed that the right engine sounded like the propeller was moving toward the beta position. The pilot increased the engine power, and the sound stopped. As the airplane got closer to the runway, he decreased the engine power, and the sound returned. In addition, the airplane began to yaw right. The pilot applied left aileron and rudder inputs to remain above the runway centerline without success. While over the runway, the pilot reduced the engine power to idle, and the airplane continued to yaw right. The pilot applied full power in an attempt to perform a go-around; however, the airplane yawed about 30 degrees off the runway centerline, touched down in the grass, and impacted trees before coming to rest. The right wing, right engine, and right propeller assembly were impact-separated. The right engine propeller came to rest about 50 ft forward of the main wreckage, and it was found in the feathered position. A review of maintenance records revealed that the right propeller had been overhauled and reinstalled on the airplane 2 days before the accident and had operated 9 hours since that time. Subsequent testing of the right propeller governor revealed that it functioned without anomaly; however, the speed settings were improperly configured. Further, the testing revealed that the beta valve travel from the neutral position was out of tolerance. Although this could have let oil pressure port to one side of the spool or the other and, thus, changed the propeller blade angle, it could not be determined whether this occurred during the accident landing. Impact damage precluded examination of the right propeller governor control linkage; therefore, it could not be determined if it was inadequately installed or rigged, which could have resulted in the propeller moving into the beta position. The investigation could not determine why the right propeller moved toward the beta position as engine power was reduced, as reported the pilot.
Probable cause:
The propeller’s movement to the beta position during landing for reasons that could not be determined during postaccident examination and testing, which resulted in an attempted goaround and subsequent loss of airplane control.
Final Report:

Crash of a De Havilland DHC-6 Twin Otter 300 off Kuredu Island

Date & Time: Jul 2, 2015 at 1709 LT
Operator:
Registration:
8Q-MAN
Survivors:
Yes
Schedule:
Male - Kuredu Island
MSN:
435
YOM:
1974
Region:
Crew on board:
3
Crew fatalities:
Pax on board:
11
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
The twin engine aircraft left the Male seaplane base at 1633 on a schedule flight to the Kuredu Island. While landing some 3 km off shore, the aircraft overturned and sunk. While all 14 occupants were quickly rescued, the aircraft was lost.

Crash of a De Havilland DHC-6 Twin Otter 300 In Mount Lawes: 4 killed

Date & Time: Sep 20, 2014 at 0945 LT
Operator:
Registration:
P2-KSF
Survivors:
Yes
Site:
Schedule:
Woitape - Port Moresby
MSN:
528
YOM:
1977
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
7
Pax fatalities:
Other fatalities:
Total fatalities:
4
Circumstances:
While approaching Port Moresby Airport, the twin engine aircraft was too low for unknown reason, hit tree tops and crashed inverted in a dense wooded area located near Mount Lawes, some 12 km north of the Port Moresby-Jacksons International Airport. Both pilots (among them an Australian citizen) and a passenger were killed, while all six other occupants were injured. The aircraft was totally destroyed. A day later, a second passenger died from his injuries.

Crash of a De Havilland DHC-6 Twin Otter 300 in Arghakhachi: 18 killed

Date & Time: Feb 16, 2014 at 1315 LT
Operator:
Registration:
9N-ABB
Flight Phase:
Survivors:
No
Site:
Schedule:
Pokhara – Jumla
MSN:
302
YOM:
1971
Flight number:
RNA183
Country:
Region:
Crew on board:
3
Crew fatalities:
Pax on board:
15
Pax fatalities:
Other fatalities:
Total fatalities:
18
Captain / Total flying hours:
8373
Captain / Total hours on type:
8131.00
Copilot / Total flying hours:
365
Circumstances:
Aircraft left Pokhara at 1243LT bound for Jumla. Thirty minutes later, crew made his last radio contact and the aircraft crashed about two minutes later in an uninhabited area located near Arghakhanchi, some 7 km northwest of Sandhikharka. Weather conditions at the time of the accident were marginal with an estimated visibility of 5 km but SAR operations were hampered. Local residents reported a burning object and the crew of an helicopter spotted the wreckage in a wooded area in the afternoon. Rescuers arrived on site in the morning of the next day, confirming that all 18 occupants have been killed, among them 17 Nepalese and one Danish according to the pax list provided by the authorities. At the time of the accident, crew encountered icing conditions with freezing rain in the region of the crash. The aircraft disintegrated on impact and debris were found on a large zone. DHC-6 s/n 302 (9N-ABB) crashed already on 05JUL1992 in Jumla.
Probable cause:
According to the investigators, the PIC lost situation awareness while cruising in IMC, causing the aircraft to collide with terrain.
The following factors were considered as contributory:
Deteriorated weather associated with western disturbance, unstable in nature and embedded CB,
Inappropriate and insufficient crew coordination while changing course of action.

Crash of a De Havilland DHC-6 Twin Otter in Kudat: 2 killed

Date & Time: Oct 10, 2013 at 1450 LT
Operator:
Registration:
9M-MDM
Survivors:
Yes
Schedule:
Kota Kinabalu - Kudat
MSN:
804
YOM:
1983
Flight number:
MWG3002
Location:
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
14
Pax fatalities:
Other fatalities:
Total fatalities:
2
Circumstances:
After landing on runway 22, aircraft veered to the right, crossed a grassy area on 165 meters, went through a fence and collided with a house alongside the airport. Right wing was sheared off on impact while the cockpit was destroyed. At least six passengers were injured while a passenger and the copilot were killed. At the time of the accident, strong wind was varying from 210 to 300 and gusting up to 31 knots.

Crash of a De Havilland DHC-6 Twin 300 Otter in Jomsom

Date & Time: May 16, 2013 at 0833 LT
Operator:
Registration:
9N-ABO
Survivors:
Yes
Schedule:
Pokhara - Jomsom
MSN:
0638
YOM:
1979
Flight number:
RNA555
Country:
Region:
Crew on board:
3
Crew fatalities:
Pax on board:
18
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
8451
Captain / Total hours on type:
8131.00
Copilot / Total flying hours:
1396
Copilot / Total hours on type:
1202
Circumstances:
Following an uneventful and short flight from Pokhara, crew was authorized to land on runway 24 with a wind component between 8 and 12 knots. For unknown reasons, captain preferred to land on runway 06 with a tailwind component which exceeded the company’s standard operating procedure. Flare was long and aircraft landed 776 feet past the runway 06 threshold (runway 06 is 2,424 long). 194 feet after touch down, aircraft left runway to the right, went through a grassy area and rolled for 705 feet before coming again onto runway. Captain decided to perform a go around and increased the engine power but aircraft did not lift off due to insufficient speed. It overrun, went down an embankment and eventually came to rest, broken in two, in the bank of the Kaligandaki River. All occupants were injured, six of them seriously.
Probable cause:
The Accident Investigation Commission has determined the most probable cause of the accident was the inappropriate conduct of STOL procedure and landing technique carried out by the PIC, during landing phase and an endeavor to carry out take off again with no sufficient airspeed, no required lifting force and non availability of required runway length to roll. Contributory factors to the occurrence is the absence of proper CRM in terms of communication, coordination and briefing in between crew members on intention and action being taken by PIC, during pre and post landing phase.

Crash of a De Havilland DHC-6 Twin Otter 300 in Sam Neua

Date & Time: Apr 17, 2013 at 1435 LT
Operator:
Registration:
RDPL-34180
Flight Phase:
Survivors:
Yes
Schedule:
Sam Neua - Vientiane
MSN:
231
YOM:
1969
Flight number:
LOA201
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
16
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Shortly after take off from Sam Neua-Nathong Airport, twin engine aircraft clipped three tops, stalled and crashed in a small river located 200 meters from the runway end. All 18 occupants were injured, five seriously. Aircraft was considered as damaged beyond repair as the left wing was sheared off and the right engine as well.