Citation I/SP (C501)
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 14; Flight Crew Total 3500; Flight Crew Type 850
Communication Breakdown; Human-Machine Interface; Situational Awareness
Deviation - Altitude Overshoot; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
General None Reported / Taken
Human Factors
We were transitioning in VFR conditions on the ZZZZZ3 arrival to the GPS approach to XXR. We loaded the approach into the FMS and set bottom attitude for the approach. I was in right seat flying and CA was in the left who is a CE510s rated pilot also. I was off auto pilot and hand flying with a different flight director display than normally used. The issue was when engaged the appr mode on flight director while still in Vnav instead of waiting until the GPS switched to LPV mode just outside of the final approach fix. The controller advised us that we had descended below the minimum vectoring altitude for that segment of the approach. The clear message here was that better crew coordination was needed.
C501 pilot reported that while handflying an approach ATC advised them that they had descended below the MVA for the segment before the FAF.