Hawker 4000
Flight Crew Multiengine; Flight Crew Commercial; Flight Crew Instrument
Aircraft Equipment Problem Less Severe
Flight Crew Rejected Takeoff; General Maintenance Action
Aircraft
We had loaded bags and passengers the other pilot had shut the baggage door. Before starting engines all 4 doors were verified as closed. Upon takeoff before V1; around 90 knots; we get a door open CAS message. It was acknowledged; and I made the decision as PIC of that leg to abort the takeoff. We taxied off and shut down the left engine. We looked on the synopsis [page] and it showed baggage door open. I went outside and saw the aft baggage door was actually open by a few inches. Further removing panels (with Maintenance on the phone assisting - and flight already scrubbed); we discovered that the door locking mechanisms was in fact failed/broken. Come to find out a metal rod had come out during takeoff and unlocked the door. The door was written up; a mechanic flew in and fixed the issue.
Hawker pilot reported a rejected takeoff due to a cargo door warning and a failed door lock mechanism.