TRACK DEV DUE TO IMPROPERLY PROGRAMMED FMC.

Narrative

WHILE DEPARTING AUSTIN FOR DALLAS AND ATTEMPTING TO INTERCEPT THE 019 DEG RADIAL OF AUSTIN (USING NAV MODE THROUGH THE FMS); IT WAS DISCOVERED THAT THE 009 DEG RADIAL HAD BEEN INADVERTENTLY ENTERED. A CORRECTION WAS IMMEDIATELY INITIATED WHEN THE CTLR GAVE A 30 DEG HDG CHANGE AND A LEVEL AT FL190 (WE WERE CLBING TO FL210). I HAD SPEND THE TIME IMMEDIATELY PRIOR TO PUSHBACK DEALING WITH A SIT THAT WAS BROUGHT UP BY A PAX. THE COPLT ENTERED THE FMS INFO (IT WAS HIS LEG). HE HAD ONLY 1 MONTH ON THE ACFT; BUT I HAD BEEN FLYING WITH HIM FOR 3 DAYS. 5 MINS PRIOR TO THE PUSHBACK I FINISHED WITH THE PAX ISSUE AND GOT INTO THE SEAT. WE COMPLETED THE CHKLISTS AND PUSHED BACK. I HAD NEGLECTED TO CHK THE FMS INPUTS. THIS IS A SERIES OF EVENTS THAT CONTINUES TO POINT OUT THE FACT THAT IN AVIATION YOU NEVER TAKE ANYTHING FOR GRANTED. SUPPLEMENTAL INFO FROM ACN 301234: INEXPERIENCE ON THE PART OF THE FO; AND THE CAPT BEING IN THE TERMINAL DEALING WITH A PAX PROB FROM A PREVIOUS LEG WHEN THE FO LOADED THE FLT PLAN IN THE FMS; AND NOT CATCHING THE ERROR ON THE PREFLT CHK CAUSED THIS SIT TO DEVELOP.