Accident de Havilland Canada DHC-6 Twin Otter 300 N707PV,

ASN Wikibase Occurrence # 326178

Date:	Saturday 28 October 1989
Time:	18:37
Type:	de Havilland Canada DHC-6 Twin Otter 300
Owner/operator:	Aloha IslandAir
Registration:	N707PV
MSN:	400
Year of manufacture:	1973
Total airframe hrs:	19875 hours
Cycles:	30139 flights
Engine model:	Pratt & Whitney Canada PT6A-27
Fatalities:	Fatalities: 20 / Occupants: 20
Aircraft damage:	Destroyed, written off
Category:	Accident
Location:	near Hoolehua-Molokai Airport, HI (MKK) - United States of America
Phase:	Approach
Nature:	Passenger - Scheduled
Departure airport:	Kahului Airport, HI (OGG/PHOG)
Destination airport:	Molokai/Kaunakakai Airport, HI (MKK/PHMK)
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
Aloha IslandAir 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: "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."

Accident investigation: