Narrative:

During taxi out at dfw airport; a caution message of 'EFIS comp mon' [displayed] twice. We were given WSTEX2 cikan transition and first fix was larrn from runway 18L. After our takeoff from runway 18L we encountered wake from a preceding md-80 series aircraft. After flaps retracted; first officer (flying pilot) maintained rate of climb to escape from the wake. As I recall; at 3;400 ft MSL regional departure control asked if we were going to larrn. I replied yes. However; after we checked to see if our navigation mode [was] on [and] we noticed that even though navigation mode and auto pilot was on we [had] drifted left of the course. We also checked for any EFIS comp mon messages. There was no message. As I was about [to] ask for vectors; ATC gave us heading of 230. Then he told us to have our equipment checked for malfunction and we were off course. I replied that we will do that and thanked him. ATC gave us a center frequency. I contacted the center. Center instructed us to go direct rbbit. He also asked us if we need vectors or we are okay to fly RNAV. In that time we were flying towards rbbit and navigation was performing normal. We replied that we are working with our equipment and seems to be okay now.today's lesson taught me about situational awareness. Instead of being too automation dependent; I must be aware of [my] position and ready to take corrective action promptly. From now on not only will I brief the departure; I will also highlight the heading and course between the fixes in the SID. And [if] any event equipment malfunction [is] suspected; immediately ask ATC for vectors.

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Original NASA ASRS Text

Title: CRJ-900 flight crew reported a track deviation occurred departing DFW airport.

Narrative: During taxi out at DFW airport; a caution message of 'EFIS COMP MON' [displayed] twice. We were given WSTEX2 CIKAN transition and first fix was LARRN from Runway 18L. After our takeoff from Runway 18L we encountered wake from a preceding MD-80 series aircraft. After flaps retracted; First Officer (flying pilot) maintained rate of climb to escape from the wake. As I recall; at 3;400 ft MSL Regional Departure Control asked if we were going to LARRN. I replied yes. However; after we checked to see if our navigation mode [was] on [and] we noticed that even though navigation mode and auto pilot was on we [had] drifted left of the course. We also checked for any EFIS COMP MON messages. There was no message. As I was about [to] ask for vectors; ATC gave us heading of 230. Then he told us to have our equipment checked for malfunction and we were off course. I replied that we will do that and thanked him. ATC gave us a Center frequency. I contacted the Center. Center instructed us to go direct RBBIT. He also asked us if we need vectors or we are okay to fly RNAV. In that time we were flying towards RBBIT and navigation was performing normal. We replied that we are working with our equipment and seems to be okay now.Today's lesson taught me about situational awareness. Instead of being too automation dependent; I must be aware of [my] position and ready to take corrective action promptly. From now on not only will I brief the departure; I will also highlight the heading and course between the fixes in the SID. And [if] any event equipment malfunction [is] suspected; immediately ask ATC for vectors.

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.