104 fatalities

Cebu Air Flight Crash into Mt Sumagaya (RP-C1507)

Mt Sumagaya, PhilippinesFlight

On February 2, 1998, a Douglas DC-9 (registration RP-C1507) operated by Cebu Pacific Air was involved in an aviation accident near Mt Sumagaya, Philippines in flight. 104 people were killed. Investigators recorded the probable cause as: The aircraft was off track by three km at the time of the accident, with contributing factors including poor operational controls by Cebu Air, inadequate pilot training and practices, non-compliance with crew training procedures, deficient procedures, and the… This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A); 1 related events involving the same aircraft type or operator are linked below.

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary reportUpdated 2026-06-11Data APIEditorial standards

A Cebu Air aircraft crashed into Mt Sumagaya while descending in marginal weather, killing all 104 occupants. The official investigation cited poor operational controls and inadequate pilot training.

Flight Details and Accident Sequence The aircraft departed Manila-Ninoy Aquino Airport at 0916LT on a regular schedule flight to Cagayán de Oro. The crew made an unscheduled stop at Tacloban Airport to deliver spare tires for another Cebu aircraft. It took off from Tacloban Airport at 1002LT and continued to Cagayán de Oro at FL115. While descending in marginal weather conditions, the aircraft struck the slope of Mt Sumagaya (2,234 metres high) located about 54 km northeast of Cagayán de Oro Airport. The aircraft disintegrated on impact and all 104 occupants were killed, among them five foreigners including one Swiss citizen. First rescuers arrived on site about 24 hours later and the wreckage was found in an isolated area about 150 metres below the summit. At the time of the accident, weather conditions were marginal with clouds and strong winds. ## Official Findings The official investigation determined that the aircraft was off track by three km at the time of the accident. The reported findings included poor operational controls by Cebu Air, inadequate and unacceptable pilot training and practices, and the operator's non-compliance with crew training procedures. More than half of the 17 procedures analyzed by the operator were deficient, and aircraft components were still in use after their expiration date.

Probable cause

The aircraft was off track by three km at the time of the accident, with contributing factors including poor operational controls by Cebu Air, inadequate pilot training and practices, non-compliance with crew training procedures, deficient procedures, and the use of expired aircraft components.