Date: 201312
Local time of day: 1801-2400
Location: CLT.Airport, NC
Flight conditions: VMC
Light: Night
Aircraft: Regional Jet 200 ER/LR (CRJ200)
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Descent
Airspace: Class C CLT
ATC / advisory: TRACON CLT
Aircraft component: FMS/FMC
Component problem: Design; Improperly Operated
Reporter organization: Air Carrier
Reporter function: First Officer; Pilot Flying
Reporter qualification: Flight Crew Air Transport Pilot (ATP)
Human factors: Workload; Training / Qualification; Human-Machine Interface; Time Pressure
Second reporter function: Check Pilot; Captain; Pilot Not Flying
Anomaly: ATC Issue All Types; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Detector: Person Flight Crew; Person Air Traffic Control
When detected: In-flight
Result: Air Traffic Control Issued New Clearance; Air Traffic Control Issued Advisory / Alert; Flight Crew Returned To Clearance; Flight Crew Overcame Equipment Problem
Contributing factors: Human Factors; Aircraft; Procedure
Primary problem: Procedure

Narrative: I was conducting my first trip on IOE and we were descending via the IVANE2 arrival into CLT; we were approaching AMOBE intersection at 210 KTS with the autopilot on. ATC had assigned us 36R then offered 36C to keep us clear of wake turbulence from heavy aircraft. The Captain [accepted the change] and switched runways in the FMS as we were approaching AMOBE intersection. This dumped the remainder of the arrival out of the FMS and reloaded the IVANE2 and new approach for 36C [all the way back to] the initial arrival fix. The autopilot continued to AMOBE before the FMS could be cleaned up and it caused us to overshoot the turn at AMOBE instead of continuing the turn to PELOY. The Captain immediately realized the problem; disconnected the auto pilot and corrected back to the proper course. We were then given a descent clearance to 4;000 FT and the flight continued with no further issues.If we had received the clearance sooner or later and cleaned it up before of after AMOBE sequenced in the FMS rather than during the sequence to the next waypoint; there would have been no issue. There was also increased task saturation since the Captain was evaluating my performance of pilot flying duties into a busy terminal area.


Second narrative: We had been assigned Runway 36R. We had this approach briefed and setup in the FMS. We were at 210 KTS; autopilot on and a couple miles from AMOBE...When selecting 36C it loaded the complete arrival and approach in again with a discontinuity behind AMOBE. We ended up flying all the way to AMOBE instead of flying by the waypoint and continuing to PELOY before I could get the FMS cleaned up.It would not have been an issue if I could have cleaned the FMS up faster or put in [the runway change] after the turn at AMOBE.


Synopsis: When Approach Control changed their runway as the flight crew of a CRJ-200 was approaching a turn at AMOBE on the runway transition portion of the IVANE RNAV STAR to CLT the FMS recycled the entire transition portion just as the jet was passing AMOBE. As a result the turn to the next waypoint was delayed and a brief track deviation resulted.