13 fatalities

Charter Flight Crashes into Ravine in Indonesia after Evasive Maneuver (PK-NUP)

Bainaha Valley, IndonesiaFlight

On March 29, 1977, a De Havilland DHC-6 Twin Otter (registration PK-NUP) operated by Merpati Nusantara Airlines - MNA was involved in an aviation accident near Bainaha Valley, Indonesia in flight. 13 people were killed. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 8 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Source recordUpdated 2026-07-04Data APIEditorial standards

A charter flight carrying tourists from Palu to Tolitoli struck tree tops and crashed into a ravine after a low-altitude scenic descent. Rescue teams recovered survivors; 13 occupants died.

Incident Overview

A charter flight departed Palu-Mutiara Airport carrying tourists, bound for Tolitoli. During the en route portion of the flight, the crew descended from an altitude of 9,000 feet to 5,000 feet to provide passengers with a better view of the area. The pilot subsequently realized the aircraft was facing a mountain and elected to gain height. However, the aircraft struck tree tops located on the top of a cliff, stalled, and crashed into a ravine.

Rescue and Casualties

Wreckage was located a few hours after the accident. A crew member and nine passengers were rescued from the site. The remaining 13 occupants, including both pilots, were killed.

Investigation

Details of the investigation are limited. The sequence of events is documented as described, but no official probable cause has been issued.

Frequently asked questions

What happened in the 29 Mar 1977 De Havilland DHC-6 Twin Otter accident near Bainaha Valley, Indonesia?

A charter flight carrying tourists from Palu to Tolitoli struck tree tops and crashed into a ravine after a low-altitude scenic descent. Rescue teams recovered survivors; 13 occupants died.

Were there any fatalities in the 29 Mar 1977 De Havilland DHC-6 Twin Otter accident?

The accident was fatal, resulting in 13 fatalities.

What aircraft was involved and where did it happen?

The accident on 29 Mar 1977 involved a De Havilland DHC-6 Twin Otter, registration PK-NUP, operated by Merpati Nusantara Airlines - MNA, at Bainaha Valley, Indonesia.