Flight Crew Private
Flight Crew Last 90 Days 35; Flight Crew Total 191; Flight Crew Type 9
Aircraft Equipment Problem Critical; Flight Deck / Cabin / Aircraft Event Other / Unknown
Aircraft Aircraft Damaged; Flight Crew Rejected Takeoff
Aircraft
Upon the commencement of takeoff roll on Runway XX at ZZZ the left rear door jettisoned from the aircraft. The door departing the aircraft was audible. Pilot noticed [the] rear door was missing. Pilot immediately aborted the takeoff and exited the runway returning to the run-up area and shut down / secured the aircraft. Pilot contacted the FBO operator to report the incident. Pilot and aircraft were approached by owner. Door was retrieved from adjacent taxiway. No damage to the aircraft was evident other than the door being jettisoned. The door itself had scuffs on the plexiglass window and sheared off at the hinges but did not appear otherwise damaged. The exterior of the aircraft appeared undamaged. Further; no damage was evident to the airport environment. No injuries to persons occurred. Pilot recalls completing all preflight checklist items prior to start; taxi; run-up and takeoff. PFD (Primary Flight Display) Annunciator indicated all doors and latches were secure. Pilot also performed a visual check indicating doors were secure. Taxi and run-up were performed without incident.  Pilot believes that the latch / sensor may have been faulty causing door to jettison during the beginning of takeoff roll.
Pilot flying DA 40 aircraft reported door departing aircraft on takeoff roll.