Indonesia

Crashed in unknown circumstances near Kroya, killing all eight crew members.
Crew (18th Squadron):
George Edward Durand,
Johan Wilhelm Gerharz,
Reinier Emil Jessurun 5.
Thanks to Bert van Willigenburg for his contribution.
Source & photos: http://www.dornierdo24k.nl/

The aircraft was grounded in Jambi for few days following technical problems. Shortly after takeoff from the Batang Hari River in Jambi, the seaplane stalled and crashed into the river and sank. Both crew members were killed. The accident occurred during combat with the Dutch forces.
Crew:
Ralph Richard Cobley, pilot,
John Londa, mechanic.
Source & photos:
http://museumperjuanganrakyatjambi.blogspot.ch/2012/02/ri-005.html

Crashed into the sea off Sumatra Island apparently after being shot down by the pilot of a Dutch Air Force fighter.

Few minutes after takeoff from Bandar Lampung-Branti Airport, the aircraft crashed into a mountainous area. As the airplane failed to arrive, SAR operations were conducted but eventually suspended few days later as no trace of the aircraft nor the crew was found. On April 7, 1978, a farmer found the wreckage in a wooded area located on Mt Punggur, about 26 km north of Branti Airport. The aircraft was performing a flight from Yogyakarta to Bukittinggi with intermediate stops in Goda AFB located in Serang and Bandar Lampung.
Crew:
Bobby Freeberg, pilot,
Bambang Saptoadji, copilot,
Mr. Santoso, copilot,
Mr. Sumadi, flight engineer,
Mr. Suryatman, radio operator.

Just after takeoff from the Surabaya Bay, while in initial climb, the seaplane lost a float, lost height and crashed into the sea. All 25 occupants were quickly rescued while the aircraft was lost.

Crashed into the sea shortly after takeoff from the bay of Poso. All 13 occupants were rescued while the seaplane sank and was lost.

Shortly after takeoff from Bandung-Andir Airport, while climbing in stormy weather, the crew informed ground that an engine failed. While trying to return, the pilot lost control of the aircraft that dove into the ground and crashed in a huge explosion into a wooded ravine located near Padalarang, about 10 km northwest of Bandung Airport. The aircraft disintegrated on impact and all 19 occupants were killed, among them 11 soldiers and four members of a music ensemble.

The crew was performing a humanitarian flight from Singapore on behalf of the Indonesian Red Cross with drugs on board. On final approach to Yogyakarta-Maguwo Airport, the Dakota was shot down by the pilots of two NEIAF (Netherlands East Indies Air Force) fighters and crashed in an open field located few km from the airport. All five occupants were killed. Indonesian authorities confirmed that the aircraft was flying under civilian color scheme but did not have any Red Cross painted on its fuselage. So it is most probable that the fighters' pilots mistook the aircraft and thought it was a military plane carrying soldiers. Both pilots were Australian citizens as all three passengers were high ranking Indonesian Army Officers. Still registered in India, the aircraft was offered few days ago to the Indonesian government by Jawaharlal Nehru, future Indian Prime Minister. Following this tragedy, Indonesian Authorities will rename the airport of Yogyakarta that became Adisutjipto instead of Maguwo.
Crew:
A. N. Constantine, pilot,
R. Hazlehurst, copilot,
B. Ram, flight engineer,
A. Q. Wirjokoesoemo, radio navigator.
Passengers:
Agustinus Adisutjipto,
Abdulrahman Saleh,
Adisumarmo Wirjokusumo.

The airplane was completing a flight from Batavia to Bandung, carrying 24 passengers and a crew of two. While descending to Bandung Airport, the crew encountered poor weather conditions with clouds and rain falls. In poor visibility, the airplane struck the slope of Mt Burangrang. The wreckage was found 23 days later and all 26 occupants were killed.

Crashed into the sea while landing off Gilimanuk, west coast of Bali. A crew member was killed while four others were injured. The seaplane was lost.