Amateur-built VARIEZE N88KL accident near Mojave, California

Probable cause

The failure of the carburetor intake Sceet tubing, which resulted in a total loss of engine power.

NTSB analysis

The pilot reported that, after takeoff and about 500 ft above ground level, the engine lost total power and he chose to land on the open desert terrain. During the landing roll, the airplane collided with vegetation and the landing gear separated, resulting in substantial damage to the fuselage undercarriage.

Examination of the airplane revealed that the air intake duct between the air filter box and the carburetor was damaged during the accident sequence and partially separated from the airplane. The ducting was Sceet tubing that comprised wire coil encased between an inner and outer silicone-impregnated layer. The Sceet tubing was disassembled and exhibited debonding of the inner and outer layers. Oil and debris that was not consistent with the accident sequence were present in the debonded area. It is likely that the loss of engine power was due to the separation of the Sceet tubing inner layer, which then restricted airflow to the carburetor.

Text from the NTSB. Open the NTSB docket for WPR22LA133 for the full record.