Event Sequence
During the takeoff rotation, the engine power decreased and the pilot heard an unusual noise from the engine area. The pilot was unable to stop the aircraft on the remaining runway and proceeded away from the airport. After making a 180-degree turn to return to the airport, the engine did not produce enough power to reach the runway. The aircraft was landed in the grass adjacent to the runway. During the rollout, the nose landing gear collapsed and the aircraft impacted a mound of dirt, where it came to rest.
Post-Crash Examination
A post-crash examination of the aircraft by an FAA inspector revealed that the engine inter-cooler system, which had been installed in accordance with a supplemental type certificate (STC), was loose at the worn single attach point. Additionally, the rubber duct from the inter-cooler to the engine was split about 50% around its circumference, causing turbocharged air to be exhausted overboard.
Inspection History
The aircraft had received an annual inspection about one flight hour before the accident. Documents for the inter-cooler system did not include any directions for inspecting the system.