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Atlas / NTSB / LAX99LA153

NTSB CAROL · Event

Event LAX99LA153

1999-04-17 EL CAJON, California, United States Airport · SEE Serious 1 aircraft Status: Completed

Aircraft involved

Probable cause & findings

Engine power loss due to an interruption of fuel to or within a carburetor, and the resultant overheating of its associated cylinder. The reason for the fuel flow interruption could not be determined.

Factual narrative

On April 17, 1999, about 0843 hours Pacific daylight time, a Ventura Rans S-12 homebuilt airplane, N8179V, experienced a total loss of engine power during initial climb from runway 27L at the Gillespie Field, El Cajon, California. The pilot, who owned and operated the experimental airplane, made a forced landing in a parking lot near the airport. During rollout the airplane was substantially damaged upon colliding with a light pole. The private pilot received minor injuries, and the passenger received serious injuries. Visual meteorological conditions prevailed, and no flight plan was filed. The personal flight was performed under 14 CFR Part 91, and originated from El Cajon about 0842. The pilot reported that all airplane systems functioned normally upon takeoff. Between 200 and 300 feet above ground level the engine lost all power, and the propeller stopped turning. The pilot stated that he was unable to land on the adjacent runway because of other airplane traffic. The pilot also reported that the examination of the 2-stroke, 2-cylinder Bombadier Rotax engine revealed one of the two cylinders was scored and exhibited signatures consistent with overheating. The cylinder appeared to have experienced an insufficient flow of the fuel-oil mixture. The carburetor connected to this cylinder assembly was examined and found devoid of fuel. Fuel was found in the second carburetor, which was connected to the second cylinder assembly. No obstructions were noted in any of the fuel lines, carburetors, or the Mikuni Kogyo engine driven dual fuel pump. A Federal Aviation Administration (FAA) inspector examined the engine and accessories. The inspector similarly noted the scored rear cylinder and piston assembly overheating signatures. No evidence regarding the apparent interruption of fuel to the rear carburetor was found. All airplane systems functioned normally upon takeoff. During initial climb, between 200 and 300 feet above ground level, all engine power was lost. Unable to return to the airport, the pilot made a forced landing in a nearby parking lot. During rollout the airplane collided with a pole. An examination of the 2-stroke, 2-cylinder Bombadier Rotax engine revealed one of the two cylinders was scored and exhibited signatures consistent with overheating. The cylinder appeared to have experienced an insufficient flow of the fuel-oil mixture. The carburetor connected to this cylinder assembly was found devoid of fuel. Fuel was found in the second carburetor, which was connected to the second cylinder assembly. No obstructions were noted in any of the fuel lines, carburetors, or the Mikuni Kogyo engine driven dual fuel pump. No evidence regarding the apparent interruption of fuel to the rear carburetor was found. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1999_LAX99LA153.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.