ACR FLT CREW DEPARTS PHX ON WRONG SID; MISSING THEIR REROUTE ON THE PDC; ONCE CORRECTED BY ATC THEY PROCEED TO FLY THROUGH ASSIGNED HEADING.

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DEPARTED PHX ON THE MAXXO 1 DEP. ATC ASKED US OUR HEADING AND I REPLIED '240.' ATC THEN ASKED WHAT SID WE WERE ON. I TOLD THEM THAT WE WERE ON THE MAXXO 1. ATC THEN SAID THAT WE WERE SUPPOSED TO BE ON THE SJN 3. AT THIS TIME I REALIZED THAT I HAD MISSED THE 'REVISED SEGMENT' NOTE ON THE PDC. THE CTLR TOLD US TO TURN TO A HEADING OF 270 DEGS. I SET 270 DEGS IN THE HEADING WINDOW AND PULLED THE KNOB. AS THE CAPT STARTED THE TURN I WENT 'HEADS DOWN' TO ENTER THE SJN 3 DEP IN THE FMGC. BY THE TIME I LOOKED UP THE CAPT HAD GONE THROUGH THE 270 DEG HEADING BY APPROX 90 DEGS. JUST AS I TOLD HIM THAT WE WERE SUPPOSED TO BE ON A 270 DEG HEADING; THE CTLR ASKED US ABOUT OUR HEADING AGAIN. I TOLD THEM THAT WE WERE CORRECTING TO 270 DEGS. ATC THEN ASSIGNED US A HEADING OF 350 DEGS. ATC WAS NOT HAPPY. THE CAPT SAID HE THOUGHT WE WERE ASSIGNED A HEADING OF 070 DEGS AND THAT'S WHY HE TURNED PAST 270 DEGS. THE FLT DIRECTOR WAS GIVING HIM CORRECT COMMANDS FOR 270 DEGS. I'M NOT SURE WHY HE FLEW THROUGH THE FD COMMANDS. WE CONTINUED WITHOUT FURTHER INCIDENT. BOTH PLTS MISSED THE 'REVISED SEGMENT' NOTE ON THE PDC; THAT WAS THE FIRST MISTAKE. THE BIGGEST MISTAKE; HOWEVER; WAS THE TURNING ERROR. I SHOULD NOT HAVE BEEN SO PREOCCUPIED WITH THE PROGRAMMING OF THE FMGC AND MONITORED THE CAPT'S TURN BETTER. ALSO; WHEN THE CAPT SAW THAT THE FD COMMAND BARS WERE NOT GIVING HIM WHAT HE THOUGHT WAS THE CORRECT INFORMATION; HE SHOULD HAVE ASKED FOR VERIFICATION. WHILE OUR NOT PUTTING THE CORRECT SID IN THE FMGC CAUSED THIS WHOLE PROBLEM; THE TURNING ERROR WAS THE MOST DANGEROUS.SUPPLEMENTAL INFO FROM ACN 794289: EVENTS THAT LED UP TO THE ERROR WERE LATE EQUIPMENT ARR AT THE GATE; NON NORMAL RELEASE FOR A FUEL STOP PRIOR TO BEING RELEASED TO ZZZ; MELS AND ACFT DOWNGRADED APCH PERFORMANCE. MINOR MAINT WORK WAS ALSO BEING DONE ON THE FLT DECK DURING PREFLT PREPARATION. BECAUSE OF THE MELS AND THE MAINT WORK BEING DONE ON THE FLT DECK I TOLD THE FO TO LOAD THE FLT PLAN FOR ME WHILE I FOCUSED MY ATTENTION OF THESE ITEMS. AFTER ALL THE DUST SETTLED AND I COMPLETED MY FLOWS I CHECKED THE ROUTING ON THE RELEASE WITH THE ROUTING THAT WAS IN THE FMCG. AT THAT TIME I DID NOT LOOK AT THE PDC ROUTING PRINTOUT. I FINISHED MY FLOWS THEN BRIEFED THE DEP. DURING MY DEP I ACTUALLY PICKED UP THE PRINTOUT OF THE PDC ROUTING AND LOOKED AT IT AND BRIEFED THE FILED CLRNC AS THE MAXXO 1. THIS IS WHAT I HAD EXPECTED AND THIS WAS WHAT WAS ON THE RELEASE AND IN THE COMPUTER. I SAW WHAT I WANTED TO SEE AND DID NOT EVEN SEE THE LINE ABOVE THE FILED CLRNC THAT SHOWED A REVISED SEGMENT HAD BEEN ADDED THAT PUT US ON THE SJN 3 TO SJN THEN J74 AS FILED. WE SIMPLY MISSED THIS OBVIOUS ROUTING CHANGE. I BELIEVE THAT BACKGROUND NOISE RELATING TO THE STATE OF THE AIRLINE AND CURRENT LABOR RELATIONS ALSO CONTRIBUTED TO THE MENTAL STATE OF BOTH THE FO AND MYSELF WHEN OTHER FACTORS ENTERED IN TO MAKE THIS A NON ROUTINE PREFLIGHT AND DEP. THE FO STATED LATER IN THE FLT THAT HE WAS FINDING IT HARD TO WANT TO COME TO WORK ANYMORE. STRESS LEVELS ARE HIGH.