3 fatalities

Fuel Exhaustion Causes Dual Engine Failure, Fatal Highway Crash on Approach to Modesto Airport (N7670L)

Modesto City-County, United States of AmericaLanding (descent or approach)

On August 19, 1977, a Piper PA-31-310 Navajo (registration N7670L) operated by Custom Executive Aviation was involved in an aviation accident near Modesto City-County, United States of America during landing or approach. 3 people were killed. Investigators recorded the probable cause as: Double engine failure on final approach due to fuel exhaustion. Contributing factors: inadequate preflight preparation, mismanagement of fuel, miscalculated fuel consumption, fuel exhaustion, forced landing off airport on land. 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

During approach to Modesto City-County Airport, both engines failed from fuel exhaustion. The pilot attempted a highway landing, but the aircraft struck a car and crashed, killing three in the vehicle and slightly injuring both aircraft occupants.

Incident Overview

On approach to Modesto City-County Airport, an aircraft experienced simultaneous failure of both engines. The pilot initiated an emergency landing on a nearby highway. During the landing attempt, the airplane collided with an automobile and subsequently crashed.

Injuries and Fatalities

Both occupants aboard the aircraft sustained minor injuries. Three individuals in the automobile were killed.

Official Findings

The probable cause of the accident was determined to be a double engine failure on final approach due to fuel exhaustion. Contributing factors included inadequate preflight preparation, mismanagement of fuel, and miscalculated fuel consumption, leading to fuel exhaustion and a forced landing off airport terrain.

Frequently asked questions

What happened in the 19 Aug 1977 Piper PA-31-310 Navajo accident near Modesto City-County, United States of America?

During approach to Modesto City-County Airport, both engines failed from fuel exhaustion. The pilot attempted a highway landing, but the aircraft struck a car and crashed, killing three in the vehicle and slightly injuring both aircraft occupants.

Were there any fatalities in the 19 Aug 1977 Piper PA-31-310 Navajo accident?

The accident was fatal, resulting in 3 fatalities.

What aircraft was involved and where did it happen?

The accident on 19 Aug 1977 involved a Piper PA-31-310 Navajo, registration N7670L, operated by Custom Executive Aviation, at Modesto City-County, United States of America.

What was the probable cause of the accident?

Double engine failure on final approach due to fuel exhaustion. Contributing factors: inadequate preflight preparation, mismanagement of fuel, miscalculated fuel consumption, fuel exhaustion, forced landing off airport on land.