...Was Climbing The Airplane To Pattern Altitude When The Engine Began To Lose Power

Location: Monticello, Utah Accident Number: WPR23LA343
Date & Time: September 13, 2023, 11:00 Local Registration: N10KP
Aircraft: Boeing A75N1(PT17) Aircraft Damage: Substantial
Defining Event: Unknown or undetermined Injuries: 1 Minor
Flight Conducted Under: Part 91: General aviation - Personal

Analysis: The pilot departed the airport, conducted a low pass over the runway, and was climbing the airplane to pattern altitude when the engine began to lose power. The pilot stated that the engine did not lose complete power; however, the rpm and airspeed continued to decline and he chose to make a forced landing. The airplane landed in heavily vegetated terrain and during the landing roll the left main landing gear collapsed, resulting in substantial damage to the lower left wing.

A postaccident examination of the airframe and engine revealed no evidence of any preaccident mechanical malfunctions or failures that would have precluded normal operation. Although remnants of a high-temperature cloth were found between the air filter and particle screen, no debris was found in the filter or induction screen and the air intake did not appear to be impeded. Based on the available information, the reason for the loss of engine power could not be determined.

Probable Cause and Findings: The National Transportation Safety Board determines the probable cause(s) of this accident to be -- A partial loss of engine power for reasons that could not be determined.

FMI: www.ntsb.gov