What happened
Prior to the flight, the aircraft was parked on a ramp during a period of inclement weather characterized by freezing rain and subsequent snowfall. During the pre-flight process, an individual assisting the pilot observed that a significant portion of the wing was covered in a coarse layer of ice, estimated to be between 1/16 and 3/16 of an inch thick. This ice accumulation was not cleared from the aircraft before departure.
During the initial climb phase, the pilot experienced a noticeable reduction in engine power accompanied by rhythmic surges in the aircraft's performance. In response to these fluctuations, the pilot began searching for an appropriate location to perform an emergency landing.
Findings
Post-accident inspections by the Lubbock fire department confirmed the presence of ice on the wing, noting a rough texture consistent with freezing rain deposits, measuring approximately 1/16 of an inch. While the aircraft experienced significant power irregularities, a thorough post-crash investigation of the engine found no mechanical deficiencies or internal failures.