Flight Crew Air Transport Pilot (ATP)
Communication Breakdown; Situational Awareness
Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Provided Assistance; Flight Crew Regained Aircraft Control; Flight Crew Became Reoriented
Human Factors; Procedure; Airspace Structure
TRISH3 RNAV Arrival BWI - Flying Pilot Briefed STAR altitude restrictions. At FL140 [we were] cleared to descend via the STAR. Non Flying Pilot (NFP) set 4000 feet into the altitude alert and was confirmed by Pilot Flying (PF). Aircraft made TROYZ Intersection at FL120 and leveled off. After level off Flying Pilot went into the FMS PROG page and observed Top of Descent for next fix was scheduled in 1 min. Flying Pilot then went into the FMS and selected Direct 8000 feet interrupting the scheduled RNAV descent. Aircraft went into an immediate descent. Non flying pilot advised Approach FMS had lost VNAV and was unable to comply with STAR. ATC then descended [us] to 4000 feet for Radar Vectors for [the] 33R Visual. CRM or lack thereof! PF was in my opinion unsure [the aircraft] was going to cross the next fix at the correct altitude. PF neglected to communicate concern. PF when unsure needs to communicate with NFP any concerns!
C680 Captain reported that the pilot flying went into the FMS and selected Direct 8000 feet interrupting the scheduled RNAV descent.