Incident Overview
An airplane sustained substantial damage after traveling off the end of the runway during a main wheels up landing. The event occurred following an aborted flight due to a cargo door opening shortly after takeoff.
Flight and Cargo Door Issue
According to the captain, prior to takeoff he closed the cargo door and the copilot confirmed that the door light was out. After takeoff, at an altitude of about 600 feet, the cockpit door popped open and the crew noticed the cargo door was open. The captain elected to return to land.
Approach and Landing Sequence
The captain reported that he repeatedly requested gear and flaps extension, but the copilot was late in executing these actions, which "caused us to overshoot the runway centerline." The copilot then began calling for a go-around/missed approach, at which time he raised the gear and retracted some flaps. The copilot reported that the captain continued to descend toward the runway and overshot the runway centerline to the right. Subsequently, the copilot lowered the gear. The nose gear extended prior to touchdown, but the main gear did not. The airplane touched down approximately halfway down the runway and traveled off the end.
Witness Observation
A witness reported noticing that the exterior door latch was not down as the airplane taxied to the runway.
Damage
The airplane sustained substantial damage on impact with terrain and objects after the runway excursion.