Airbus 318/319/320/321 Undifferentiated
Confusion; Human-Machine Interface; Situational Awareness; Workload; Distraction
Deviation - Altitude Crossing Restriction Not Met; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued New Clearance; Flight Crew Returned To Clearance; Flight Crew Became Reoriented
Chart Or Publication; Human Factors; Procedure
After briefing the descent/arrival TRIDE.1 Runway 10C into ORD we were discussing an apparent discrepancy between the Arrival Chart and what the FMS was displaying. (Chart shows GIBNS to JUKIC then 090 HDG; FMS showed GIBNS to BAIRY [ILS 10C IAF] we never did figure out which was right). We were given clearance to cross 20 south VINCA at FL330. Pilot flying dialed in 330 and proper crosschecks and callouts were made. Pilot flying then entered VINCA/-20 in the MCDU. We got distracted trying to figure out the discrepancy and started down late. During the early part of the descent ATC queried us if we were descending and would we make the crossing. I replied we would not; we would be a bit high. ATC re-cleared us to descend to FL330. We replied we would expedite to FL330. One of us should have been aviating.
An A319 crew became distracted while comparing the FMS track of the ORD TRIDE ONE RNAV Arrival; ILS 10C which indicated GIBNS direct BAIRY while the paper chart indicated GIBNS; JUKIC then heading 090. The crew failed to begin a descent for a crossing restriction.