Large Transport
Flight Crew Air Transport Pilot (ATP)
Confusion; Fatigue; Workload; Time Pressure; Situational Awareness
ATC Issue All Types; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued New Clearance
Procedure; Human Factors
Arriving into DEN we initially planned on the BOSSS2 Arrival; landing 35R; due to weather; the arrival was changed to the QUAIL7 Arrival. The approach was being briefed and the arrival was changed back to the BOSSS2. ATC was very busy and there were many airspeed changes as well as off route vectors. I enlarged the approach chart in order to read it and that moved the approach transition portion of the approach out of view. Coupled with the fact that it was late and I was tired (but fit for duty); I simply did not program or brief the approach transition which included BOSSS; EPICC; CPPER; CHAPP; and CRUPP. Instead I shortcut those and flew from BOSSS direct CRUPP. Shortly after; Approach asked where we were going and issued a 330 heading to intercept the 35L Localizer. The remaining portion of the flight was without incident. This was 100 percent my fault. I do believe that the distractions with the changes in the arrival; runway change; speed changes; and off route vectors played a significant role in my failed programming and briefing. Having said that; I assume full responsibility and will be aware of these gotchas in the future. It would be nice if Denver could stick to one arrival; or at the very least one runway. But as pilots; we must constantly be ready for the unexpected; this is our job.
Air carrier Captain reported Denver Approach issued two changes to their cleared arrival procedure and expected landing runway. Initial clearance was for the BOSSS TWO RNAV Arrival; landing 35R. That was changed to the QUAIL SEVEN Arrival; and then changed back to the BOSSS TWO RNAV Arrival; landing runway 35L. While reprogramming their navigation computer for that latest clearance; the crew did not program the entire approach transition and as a result failed to fly the arrival/approach transition as cleared. ATC noticed the aircraft track error and issued a vector to intercept the final approach course.