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Accident description
Last updated: 29 March 2017
Date:Saturday 28 October 1989
Time:18:37 HST
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:Aloha IslandAir
Registration: N707PV
C/n / msn: 400
First flight: 1973
Total airframe hrs:19875
Engines: 2 Pratt & Whitney Canada PT6A-27
Crew:Fatalities: 2 / Occupants: 2
Passengers:Fatalities: 18 / Occupants: 18
Total:Fatalities: 20 / Occupants: 20
Airplane damage: Destroyed
Airplane fate: Written off (damaged beyond repair)
Location:near Hoolehua-Molokai Airport, HI (MKK) (   United States of America)
Crash site elevation: 183 m (600 feet) amsl
Phase: Approach (APR)
Nature:Domestic Scheduled Passenger
Departure airport:Kahului Airport, HI (OGG/PHOG), United States of America
Destination airport:Molokai/Kaunakakai Airport, HI (MKK/PHMK), United States of America
Flight 1712 departed Kahului at 18:25 for a 25-minute VFR flight to Kaunakakai. The aircraft climbed to 1000 feet and descended to 500 feet at 18:30. The plane struck a 27deg rocky slope on the north-eastern slopes of the coastal mountains on the island of Molokai at around 600 feet.

Probable Cause:

PROBABLE CAUSE: "The decision of the captain to continue flight under visual flight rules at night into instrument meteorological conditions (IMC), which obscured rising mountainous terrain. Contributing to the accident was the inadequate supervision of personnel, training, and operations by Aloha IslandAir management. Also contributing to the accident was the insufficient oversight during a period of rapid operational expansion and corporate growth."
Board member Jim Burnett filed the following dissenting statement on the Probable Cause: "I would add to the statement of probable cause the following additional language: Also contributing to the accident was the failure of the Federal Aviation Administration to require a Ground Proximity Warning System for Part 135 aircraft."

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

» NTSB/AAR-90/05

Official accident investigation report
investigating agency: National Transport Safety Bureau (NTSB) - United States of America
report status: Final
report number: NTSB/AAR-90-05
report released:25 September 1990
duration of investigation: 11 months
download report: Aloha IslandAir, Inc., Flight 1712 DeHavilland Twin Otter, DHC-6-300, N707PV, Halawa Point, Molokai, Hawaii, October 28, (NTSB/AAR-90-05)

Follow-up / safety actions

NTSB issued 11 Safety Recommendations

Show all AD's and Safety Recommendations


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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 Kahului Airport, HI to Molokai/Kaunakakai Airport, HI as the crow flies is 74 km (46 miles).

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DHC-6 Twin Otter

  • 146th loss
  • 97th fatal accident
  • 930+ built
  • 6th worst accident (at the time)
  • 11th worst accident (currently)
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