A319 CAPTAIN DETAILS HIS REFUSAL TO DEPART WITH THREE DIFFERENT ACFT FOR MAINTENANCE DISCREPANCIES. ALSO NOTES PRESSURE FROM MAINTENANCE SUPERVISOR NOT TO DO SO.

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AFTER GETTING TKOF CLRNC WE TAXIED INTO POS AND STARTED OUR TKOF ROLL. WE GOT A PACK OVERHEAT WARNING AND ABORTED OUR TKOF. WE TAXIED OFF THE RWY AND IN THE PROCESS OF GETTING IN TOUCH WITH OUR DISPATCHER AND MAINT; THE ELAC 1 CAME ON. AFTER TALKING WITH DISPATCH AND MAINT; WE ALL AGREED THAT THE ACFT WOULD BE TAKEN OTS SINCE THESE WERE RECURRING ISSUES AND IT WAS NOT REASONABLE TO TAKE THIS AIRPLANE TO A NON-MAINT ARPT. WE RETURNED TO THE GATE. AFTER DEPLANING WE WENT TO OUR NEW GATE. BEFORE WE HAD A CHANCE TO EVEN GET ON THE AIRPLANE; A MAINT SUPVR APCHED ME AND ASKED IF I HAD OFFICIALLY DECLINED THE AIRPLANE. HE WAS A LITTLE RUDE AND CONFRONTATIONAL. I ASKED HIM WHO HE WAS AND THEN SHOWED HIM THE ACARS WITH THE DECLINE. HE TOLD ME THAT I DID NOT DECLINE THE AIRPLANE; SO I PROCEEDED TO CALL DISPATCH. UPON DOING THAT I REALIZED THAT THE SUPVR WAS NOT TALKING ABOUT THE PREVIOUS AIRPLANE BUT THE CURRENT ONE WHICH HAD AN ISSUE I WAS NOT AWARE OF. EVIDENTLY; THE AIRPLANE HAD A BRAKE PROB. AFTER TALKING WITH THE DISPATCHER; IT WAS DECIDED THAT IT WAS NOT SAFE TO TAKE THIS AIRPLANE SINCE WE WERE GOING TO AN ARPT WITH A SHORT RWY. I INFORMED THE MAINT SUPVR OF THE CURRENT SITUATION AND AGAIN WAS ASKED TO OFFICIALLY DECLINE THE AIRPLANE AND HE ALSO ADVISED ME THAT I WAS NOT FOLLOWING OFFICIAL PROC. AS FAR AS I WAS CONCERNED I WAS DOING EVERYTHING BY THE BOOK. AFTER MAINT DEACTIVATED THE GAUGE; THE MAINT SUPVR ONCE AGAIN CAME OVER TO ME IN AN AGITATED MANNER AND ASKED THAT WHY; AFTER THE GAUGE WAS DEACTIVATED; WOULD I STILL NOT TAKE THE AIRPLANE. HE TOLD ME THAT BY DECLINING THE AIRPLANE I WAS INCONVENIENCING ALL THESE PAX WHO WERE ALREADY LATE AND NOT TO FORGET THAT THEIR BUSINESS PAYS OUR SALARIES. I INFORMED HIM THAT I WAS NOT TRYING TO INCONVENIENCE ANYONE; BUT THAT INSTEAD I WAS TURNING DOWN THE ACFT BECAUSE IT WAS NOT SAFE AND THAT I WAS FIRST AND FOREMOST CONCERNED WITH SAFETY. AFTER THIS FRUSTRATING CONVERSATION; I CALLED THE ZZZ CHIEF PLT AND DISCUSSED THE SITUATION AT HAND. HE AGREED WITH MY ACTIONS AND DECISIONS AND THOUGHT I WAS HANDLING THE SITUATION CORRECTLY. I WAS ALSO CONTACTED BY THE DUTY FLT MGR SO HE COULD GET UP TO DATE ON THE SITUATION; EVIDENTLY HE WAS INFORMED OF IT SOMEHOW; AND HE WAS ALSO SUPPORTIVE. UPON THE SECOND DECLINE; I WAS GIVEN A THIRD AIRPLANE THAT WAS COMING IN FROM THE HANGAR. THIS AIRPLANE HAD AN ENG REPLACED. I STARTED TO DO THE WALKAROUND AND NOTICED A LARGE AMOUNT OF HYD FLUID UNDERNEATH ENG #1. THERE WAS SO MUCH FLUID THAT I; FOR A SECOND; THOUGHT THAT IT COULDN'T HAVE COME FROM THIS AIRPLANE. I THEN GET ON THE PHONE AND FIND OUT THAT THE AIRPLANE HAS A HYD LEAK FROM THE GREEN LINE WHEN THE ENGS ARE STARTED UP. THIS AIRPLANE HAD A MAINT ISSUE AND MAINT TOOK IT OUT OF SVC. TODAY; I ENCOUNTERED 3 AIRPLANES THAT ALL HAD SOME KIND OF MAINT ISSUE. I; IN THE INTEREST OF SAFETY; COULD NOT TAKE ANY OF THESE AIRPLANES.