Airliner 99
Training / Qualification
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
Aircraft Aircraft Damaged
Human Factors; Aircraft
I am a Beech 99 Captain operating as a single pilot under part 135. I was operating a flight from ZZZ to ZZZ1. I was on radar vectors and was instructed to proceed direct to ZZZZZ Intersection to intercept Airway X. At this time I was level at 10;000 feet when I noticed my pilot hatch was not all the way secured. I decided to try to secure it myself in flight. When I opened the pilot hatch in an attempt to latch it again to secure it all the way; the pilot hatch was ripped off by the wind. I was over ZZZ2 at the time.
Beech 99 Captain reported the pilot hatch departed inflight.