Accident Summary
A pilot reported that during the initial application of takeoff power, the left engine backfired. The pilot attributed the backfire to a possible too-sudden application of power. Subsequently, the pilot admitted to letting the aircraft drift to the left side of the runway due to inattention.
Pilot Actions
Just after the aircraft became airborne, it immediately began a roll to the left. The pilot applied full right aileron and rudder in an attempt to counter the roll, but despite these inputs, the left wing scraped the ground. The pilot then rejected the takeoff, and during the abort, the aircraft groundlooped.
Flight Purpose and Outcome
The purpose of the flight was to transport parachutists. The aircraft sustained damage from the wing striking the ground and the subsequent ground loop. No further details about injuries or aircraft condition were provided in the source.