21 fatalities

Aircraft Strikes Mountain on Approach to Las Lomitas Airport, Killing All 21 Occupants (XA-IOR)

Las Lomitas, MexicoLanding (descent or approach)

On January 29, 1986, a Douglas DC-3 (registration XA-IOR) operated by Aero California was involved in an aviation accident near Las Lomitas, Mexico during landing or approach. 21 people were killed. Investigators recorded the probable cause as: The crew failed to realize their altitude was insufficient, resulting in the aircraft striking a mountain. 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

While diverting to Las Lomitas Airport due to fog, a commercial aircraft crashed into a mountain near the airfield after the crew failed to maintain sufficient altitude. All 21 occupants were killed.

Accident Details

The accident occurred during a descent to Los Mochis Airport when the crew encountered foggy conditions. With visibility falling below minimums for that airport, the crew decided to divert to Las Lomitas Airport. While approaching Las Lomitas in poor visibility, the crew failed to realize that their altitude was insufficient. The aircraft subsequently struck a mountain located a few kilometers from the airfield.

Fatalities

All 21 occupants aboard the aircraft were killed in the impact.

Airfield Status

At the time of the accident, the Las Lomitas Airfield was not open to commercial flights anymore.

Probable cause

The crew failed to realize their altitude was insufficient, resulting in the aircraft striking a mountain.