Regional Jet 200 ER/LR (CRJ200)
ATC Issue All Types; Aircraft Equipment Problem Less Severe; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Returned To Clearance
Aircraft; Human Factors; Procedure
When conducting the IVANE FOUR arrival procedure; Charlotte approach control changed the landing runway assignment multiple times. The pilot monitoring updated the FMS. While in the FMS NAV mode; with the autopilot engaged; the aircraft failed to turn at the AMOBE waypoint. The pilot flying immediately corrected the aircraft from deviating further from course and selected HDG mode to re-join the arrival. The waypoint was overflown by approximately 1/2 mile and the arrival procedure was rejoined. Nothing further occurred. The FMS failed to navigate in NAV mode; while still showing FMS in the flight mode annunciator; due to the numerous runway changes issued by Charlotte approach.
CRJ-200 First Officer reported deviating from cleared course on approach to CLT; citing multiple runway changes and slow FMC processor speed as contributory.