Challenger 650
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew FLC Overrode Automation
Aircraft; Procedure
We were being vectored for an ILS Runway 16R at VNY. The turn was well over 90 with a 130 heading to intercept. ATC changed the heading to 190 to intercept from the other side. The aircraft started to descend even with ALT Hold on. I disengaged the auto pilot to recapture the altitude by hand. We got a sudden uncommanded go around. The PM (Pilot Monitoring) then re-entered the ILS and we tried to recapture the ILS. Again we had a go around. We were VMC and saw the terrain and VNY and I decided to just manually land the plane rather than go IFR. We never had a EGPWS warning and temporarily lost ATC com. We landed without further incident.
Pilot reported continuing the approach and landing after autopilot malfunctioned and a loss of communications with ATC.