Amateur-built PULSAR XP N912RV accident near San Angelo, Texas

Probable cause

The loss of engine power due to fuel starvation as a result of a blocked fuel vent line.

NTSB analysis

The sport pilot reported that the airplane had not been flown in 4 months. Six gallons of fuel were in the right tank, and three gallons were in the left tank; right wing tank was selected during the accident flight. The engine start, taxi, and run-up were normal. About 4 minutes after engine start, the pilot taxied onto the runway and departed. He reported that the airplane climbed to about 50 feet above ground level when the engine had a total loss of engine power. The airplane landed in a field and sustained substantial damage. During postaccident examination, the fuel tanks, fuel lines, and fuel strainer were checked for debris and water contamination, but none were observed. The engine-driven mechanical fuel pump, the electric fuel pump, and the engine all were tested and operated normally. However, the outboard section of right wing fuel vent line was blocked by debris. The blockage was removed from the fuel vent line; it measured about ¼-inch wide at its widest and about ½-inch long. The blocked fuel vent line likely created a vacuum, which resulted in fuel starvation to the engine.

Text from the NTSB. Open the NTSB docket for CEN12FA249 for the full record.