No fatalities

Engine Fire Leads to Forced Landing Near Hyder, Arizona (N7866Q)

Hyder, United States of AmericaFlight

On September 7, 1978, a Cessna 402 (registration N7866Q) operated by Cochise Airlines was involved in an aviation accident near Hyder, United States of America in flight. No fatalities were reported. Investigators recorded the probable cause as: Engine fire in flight due to improper maintenance. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A).

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary report: the U.S. National Transportation Safety Board (NTSB) historical archive (1962-1981)Updated 2026-07-04Data APIEditorial standards

An aircraft experienced an in-flight engine fire after an exhaust pipe failure, forcing an emergency landing in a desert area near Hyder, AZ. The aircraft was destroyed, but both occupants sustained minor injuries.

Flight and Incident

During a flight from Yuma to Phoenix, the left engine caught fire after the exhaust pipe separated in flight. The pilot reduced altitude and attempted an emergency landing in a desert area located near Hyder, Arizona. The airplane crash landed and came to rest in flames, resulting in the destruction of the aircraft. Both occupants escaped with minor injuries.

Emergency Landing

The pilot initiated a descent and maneuvered the aircraft towards an unpopulated desert area to perform the forced landing. The aircraft touched down in rough terrain and was subsequently consumed by fire. Despite the damage, the two individuals on board were able to exit the aircraft with only minor injuries.

Investigation Findings

The official investigation determined that the engine fire occurred due to improper maintenance. Contributing factors included a powerplant failure originating from the exhaust system, excessive vibration and subsequent separation of the exhaust pipe caused by a fatigue fracture, and a fire in the engine. Additionally, the forced landing off airport on land was a consequence. Investigators found that a bolt connecting the ball joint on the left engine right side was missing.

Probable cause

Engine fire in flight due to improper maintenance.

Frequently asked questions

What happened in the 7 Sept 1978 Cessna 402 accident near Hyder, United States of America?

An aircraft experienced an in-flight engine fire after an exhaust pipe failure, forcing an emergency landing in a desert area near Hyder, AZ. The aircraft was destroyed, but both occupants sustained minor injuries.

Were there any fatalities in the 7 Sept 1978 Cessna 402 accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 7 Sept 1978 involved a Cessna 402, registration N7866Q, operated by Cochise Airlines, at Hyder, United States of America.

What was the probable cause of the accident?

Engine fire in flight due to improper maintenance.