AN ACR MLG FAILED TO FOLLOW ITS FILED AIRWAYS ROUTING.

Narrative

DURING FMC PREFLT WE DID NOT NOTICE THAT OUR DISPATCHER HAD FILED US ON THE #2 STORED FLT PLAN (THIS IS ALWAYS NOTED IN THE REMARKS SECTION). WE RECEIVED OUR PDC CLRNC 'AS FILED' AND DEPARTED WITH THE PRIMARY RTE (#1) IN THE FMC (PHL ISP 1/#1934). THE 2 RTES START OUT THE SAME; BUT SHORTLY AFTER WE MADE AN INCORRECT INTERCEPT; ATC ASSIGNED US VECTORS TO ISP (WE WERE THE SECOND ACR X FLT TO ATTEMPT THE WRONG RTE THAT DAY). CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTING CAPT ADMITS THAT HE GOOFED -- HE DID NOT JERK THE FLT PLAN FROM HIS FO'S HANDS AND READ IT TO FIND THAT THEY WERE GOING ON RTE 2 THIS EVENING. 99 PLUS PERCENT OF THE TIME; THIS ACR'S FLTS ARE ROUTED OVER RTE 1. ON THIS PARTICULAR DAY; SEVERAL WERE SENT ON RTE 2 AND EVERY ONE MADE THE SAME MISTAKE WHEN THE 2 RTES DIVERGED; PARTLY BECAUSE THE DISPATCHER DIDN'T EMPHASIZE THE CHANGE IN ROUTING. THE RPTING CAPT DEPLORES THE FACT THAT HE CAN BE TAKEN OUT OF THE LOOP WHILE THE FO IS PUNCHING BUTTONS AND GETTING VITAL INFO THAT OFTEN IS NOT PROPERLY SHARED.