Amateur-built RV10 accident near Hurricane, Utah, November 22, 2021

The NTSB's narrative final · quoted from the NTSB record

The pilot reported that after takeoff, on the downwind leg of the airport traffic pattern, he reduced power and decreased his rate of climb due to rising engine operating temperatures. Shortly after, the engine experienced a complete loss of power. Despite attempts to troubleshoot, the pilot was unable to restore engine power and conducted a 360° turn to lose altitude prior to landing. However, after turning onto final approach for the runway, he realized he did not have enough altitude to make it to the runway and initiated a forced landing to an open field. The airplane landed hard and impacted terrain before it came to rest in a nose-low attitude, resulting in substantial damage to the fuselage and left wing. Postaccident examination of the recovered airframe and engine revealed that the fuel line from the fuel servo outlet port to the fuel flow transducer inlet port was loose at the fuel servo fitting. The loose fuel line would not allow for enough fuel pressure to reach the fuel flow divider and fuel injection nozzles, thus resulting in a loss of engine power. Recorded engine data revealed that fuel flow had decreased, while fuel pressure had remained steady, which would be consistent with a loose fuel line. The airplane’s last condition inspection was performed about 19 flight hours before the accident.

The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.