Takeoff and Door Issue
A Piper PA-28-140 had just taken off when the main cabin door unlocked at the top. The pilot returned for a landing but had to execute a go-around due to traffic. The aircraft was on final for its second approach with the top of the main cabin door still unlocked.
Descent and Impact
While passing a hill, the aircraft started to sink, and full power would not stop the descent. The aircraft struck telephone lines and a pole, shearing off the right wing prior to hitting the ground. The pilot and passenger received minor injuries, while the aircraft received substantial damage.
Post-Impact Examination
The aircraft propeller tips were bent forward, and the leading edge of the propeller had severe leading edge damage and chordwise scrapes. The engine was examined, and no defects or malfunction could be found.