Crj-900 flight crew reported lining up for the wrong runway.

Attributes
ACN	1564703
Time
Date	201807
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Regional Jet 900 (CRJ900)
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types

Narrative:

We set the aircraft up for an approach to xxr. Once on with approach we got changed to xxc. We got the numbers; rebriefed the approach; and set the new nav freq. We got cleared to join xxc approach and joined xxr by mistake. Once ATC asked if we joined the center we realized what had happened. I kicked the autopilot off while the captain fixed the problem and we moved over to the center outside of zzzzz. The flight continued with no further occurrences. What happened was in the approach phase of flight we became task saturated with switching everything and the captain forgot to change the runway in the FMS and I forgot to make sure he did it. ATC did not issue a phone number. And no other aircraft had to deviate because of our mistake.

Original NASA ASRS Text

Title: CRJ-900 flight crew reported lining up for the wrong runway.

Narrative: We set the aircraft up for an approach to XXR. Once on with Approach we got changed to XXC. We got the numbers; rebriefed the approach; and set the new nav freq. We got cleared to join XXC approach and joined XXR by mistake. Once ATC asked if we joined the center we realized what had happened. I kicked the autopilot off while the captain fixed the problem and we moved over to the center outside of ZZZZZ. The flight continued with no further occurrences. What happened was in the approach phase of flight we became task saturated with switching everything and the captain forgot to change the runway in the FMS and I forgot to make sure he did it. ATC did not issue a phone number. And no other aircraft had to deviate because of our mistake.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.