PIC RPT REGARDING THE ACCEPTANCE OF A CL65 WITH 2 CONFLICTING ITEMS ON A MULTIPLE DEFERMENT THAT WAS NOT DETECTED UNTIL POSTFLT AT ZZZ; US.

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ON JAN/SAT/04; I MAY HAVE INADVERTENTLY FLOWN THE ACFT ILLEGALLY. THE ACFT MAY HAVE HAD 2 DEFERRED ITEMS WHICH CONFLICTED WITH EACH OTHER. ONE WAS MEL 21-24-066 (A DEFERRED OVERBOARD EXHAUST SHUTOFF VALVE) AND THE OTHER WAS MEL 52-70-01A (A DEFERRED PAX DOOR INDICATION SYS). MEL 21-24-066 STATES THAT PAX DOOR INDICATION SYS MUST BE OPERATIVE IN ORDER TO DEFER THE OVERBOARD EXHAUST SHUTOFF VALVE. THIS INFO WAS BROUGHT TO ME 2 DAYS LATER BY ANOTHER CAPT. THIS FLT WAS THE FIRST LEG OF A 4 DAY TRIP. ORIGINALLY I WAS SCHEDULED TO OPERATE ANOTHER ACFT. UPON ARR AT THE FIRST ACFT I FOUND MAINT WAS WORKING ON THE CREW OXYGEN SYS. I GOT MYSELF SITUATED IN THE COCKPIT AND STARTED PERFORMING THE APPROPRIATE CHKLISTS. AT ABOUT 25 MINS PRIOR TO DEP; MAINT INFORMED ME WE WOULD BE CHANGING ACFT. MY CREW AND I PROCEEDED TO THE NEW ACFT WHICH WAS ON THE OTHER SIDE OF THE CONCOURSE. WE ARRIVED THERE APPROX 15 MINS PRIOR TO DEP. I DISCOVERED THE ACFT HAD BEEN FERRIED IN FROM THE MAINT BASE AND SO REQUIRED A SECURITY CHK. SO; ON TOP OF RUNNING ALL THE OTHER CHKLISTS; I HAD TO MAKE SURE MY CREW PERFORMED A SECURITY CHK. I ALSO HAD TO GET THE FLT RELEASE AMENDED WHICH ALSO TOOK SOME MORE TIME. I DID LOOK AT THE MAINT LOG AS REQUIRED; BUT SOMEHOW MUST HAVE OVERLOOKED THE PAX DOOR INDICATION SYS DEFERRAL. I RECALLED BRIEFING MY CREW OF THE OVERBOARD EXHAUST SHUTOFF VALVE DEFERRAL AND A FEW OTHER MINOR DEFERRALS. I ASKED MY CREW; WHEN I FOUND OUT THE DISCREPANCY; IF I HAD MENTIONED THE PAX DOOR INDICATION SYS DEFERRAL AND THEY DID NOT RECALL I SAID ANYTHING ABOUT IT. I BELIEVE THAT MY EAGERNESS TO GET THE FLT OUT ON TIME CAUSED ME TO PERFORM MY DUTIES IN A HURRIED FASHION. WHILE I BELIEVE THAT THE LAST MIN ACFT CHANGE AND THE INCREASED PACE OF GND AND GATE CREW TO GET THE FLT OUT ON TIME WERE CONTRIBUTING FACTORS; THE ERROR LIES IN THE FACT I LET MYSELF GO FASTER THAN I NORMALLY WOULD. WHILE THE FLT WAS UNEVENTFUL; A PROB WOULD HAVE AROSE DUE TO MY NOT CATCHING THE DISCREPANCY. IN ORDER TO CORRECT THIS FOR THE FUTURE; NOT ONLY WILL I MAKE A CONSCIOUS EFFORT NOT TO LET MYSELF GET HURRIED BUT I WILL ALSO LET MY CREW LOOK AT THE MAINT LOG SO AS TO DOUBLE-CHK MYSELF.