What happened
The aircraft had recently undergone a conversion involving the installation of a new engine. During the initial ground runup prior to departure, the pilot reported that the engine operated normally with no apparent issues. However, immediately after liftoff, the engine lost all power.
Despite the sudden mechanical failure, the pilot maintained control and was able to execute a 180-degree turn to return to the airport. The aircraft landed on the runway; however, the landing was hard due to the circumstances of the emergency approach.
The investigation
A post-accident inspection of the aircraft revealed the root cause of the engine failure. Investigators found that the fuel lines connecting the fuel pump had been improperly installed during the conversion work. This installation error prevented proper fuel flow, leading to the loss of power.
Findings
The primary factor contributing to the accident was the improper installation of fuel lines from the fuel pump. This mechanical defect directly caused the engine to lose power shortly after takeoff. The pilot's ability to recognize the failure and execute a return landing prevented a more severe outcome, although the aircraft sustained damage from the hard landing.