Narrative:

FMS was programmed correctly and the first officer and I verified the routing at the gate. The route was 18C; BLGRS7; bwg; WILDER4; mem. After takeoff; departure gave us a heading to intercept. I put cvg in the top (blue) to intercept. I hit the execute button as I asked for verification. We then noticed I had somehow put the wrong fix in the wrong spot and messed up the FMS routing. Just as I finished putting all the fixes for the BLGRS7 and the rest of the routing in; ATC asked us who gave us direct bwg? We told him our clearance was BLGRS7; bwg transition. He then gave us direct iiu to resume the BLGRS7. I know the correct order is to enter changes; verify and then execute. I was too quick to hit the button while I was asking for verification. This created the mess that I had to go back and change instead of just being able to hit the cancel modification button. After messing up the FMS; I should've immediately switched to green data to make the intercept or just programmed the first 2 fixes to get established before taking the time to enter all the fixes; verifying; and executing. This would have gotten us back on track instead of wandering off course; thus prompting the query from ATC.

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Original NASA ASRS Text

Title: CAPT OF CARJ EXECUTES INCORRECT MODIFICATION OF FMS RTE PRIOR TO HAVING FO VERIFY ITS ACCURACY. TRACK DEV RESULTS.

Narrative: FMS WAS PROGRAMMED CORRECTLY AND THE FO AND I VERIFIED THE ROUTING AT THE GATE. THE RTE WAS 18C; BLGRS7; BWG; WILDER4; MEM. AFTER TKOF; DEP GAVE US A HDG TO INTERCEPT. I PUT CVG IN THE TOP (BLUE) TO INTERCEPT. I HIT THE EXECUTE BUTTON AS I ASKED FOR VERIFICATION. WE THEN NOTICED I HAD SOMEHOW PUT THE WRONG FIX IN THE WRONG SPOT AND MESSED UP THE FMS ROUTING. JUST AS I FINISHED PUTTING ALL THE FIXES FOR THE BLGRS7 AND THE REST OF THE ROUTING IN; ATC ASKED US WHO GAVE US DIRECT BWG? WE TOLD HIM OUR CLRNC WAS BLGRS7; BWG TRANSITION. HE THEN GAVE US DIRECT IIU TO RESUME THE BLGRS7. I KNOW THE CORRECT ORDER IS TO ENTER CHANGES; VERIFY AND THEN EXECUTE. I WAS TOO QUICK TO HIT THE BUTTON WHILE I WAS ASKING FOR VERIFICATION. THIS CREATED THE MESS THAT I HAD TO GO BACK AND CHANGE INSTEAD OF JUST BEING ABLE TO HIT THE CANCEL MODIFICATION BUTTON. AFTER MESSING UP THE FMS; I SHOULD'VE IMMEDIATELY SWITCHED TO GREEN DATA TO MAKE THE INTERCEPT OR JUST PROGRAMMED THE FIRST 2 FIXES TO GET ESTABLISHED BEFORE TAKING THE TIME TO ENTER ALL THE FIXES; VERIFYING; AND EXECUTING. THIS WOULD HAVE GOTTEN US BACK ON TRACK INSTEAD OF WANDERING OFF COURSE; THUS PROMPTING THE QUERY FROM ATC.

Data retrieved from NASA's ASRS site as of January 2009 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.