B737-300 OUTBOUND CAPT DID NOT LIST A MAINT DISCREPANCY IN THE ACFT MAINT LOGBOOK. THE PROB WAS FOUND AFTER THE INBOUND CAPT SET THE BRAKES.

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FLT FROM LAX TO TUS. WE ARRIVED IN TUS 1 HR LATE DUE TO WX EARLIER THAT DAY IN GEG. MY FO AND I WERE SCHEDULED TO DEADHEAD BACK TO LAX ON THE SAME ACFT. ON ARR; THE GATE AGENT INFORMED US TO CONTACT CREW SCHEDULING. THE FO WAS REASSIGNED TO WORK THE FLT BACK TO LAX INSTEAD OF DEADHEADING. I MET THE CAPT IN THE JETWAY. WHILE INFORMING HIM ON THE STATUS OF THE ACFT; A GND OPS AGENT APCHED US. HE INFORMED US OF A FUEL LEAK JUST OUTSIDE OF THE #1 ENG. HE REALIZED THAT WE BOTH WERE CAPTS; AND ASKED 'WHO'S THE OUTBOUND CAPT?' I POINTED TO THE OTHER CAPT. WITH THAT; WE BOTH WENT DOWN TO INVESTIGATE THE PROB. THE LEAK ON THE FLAP CANOE WAS VERY LIGHT; A FEW DROPS OF FLUID WERE NOTICED ON THE CANOE AND A SMALL AREA OF FLUID WAS NOTICEABLE ON THE RAMP. IT WAS NOT FUEL; BUT HYD FLUID. WHILE INVESTIGATING THE CANOE; A LARGER LEAK WAS NOTICED UNDER THE R ACFT BAY; AND APPEARED TO BE COMING FROM THE TURBO FAN EXHAUST PORT. THE AMOUNT OF HYD FLUID LEAKING FROM THE R ACFT EXHAUST APPEARED TO BE HVY. THE FLUID UNDER THE ACFT AT THIS POINT COVERED AN AREA BTWN 2-3 SQUARE FT. THE OTHER CAPT AND MYSELF MADE A VISUAL INSPECTION OF THE WHEEL WELL. I DID NOT DETECT ANY VENTING FROM EITHER OF THE 2 HYD SYS. THE AMOUNT OF HYD FLUID IN THE WHEEL WELL CAVITIES IN MY OPINION WAS INCONSISTENT WITH THE AMOUNT OF FLUID ON THE RAMP. IT APPEARED TO ME THAT THE FLUID MAY BE LEAKING FROM THE TURBO FAN AREA OR AIR CYCLE MACHINE IN THE ACFT BAY; AND IN THE INTEREST OF SAFETY; ESPECIALLY WITH ALL THOSE BLEED LINES PRODUCING EXTREME HEAT; THE SAFEST COURSE OF ACTION WOULD BE TO HAVE MAINT INSPECT THE ACFT. WHILE RETURNING TO THE JETWAY; I INFORMED THE OTHER CAPT THAT I WAS GOING TO CONTACT MAINT CTLR. AFTER CONSULTING WITH MAINT CTLR; THE DECISION WAS MADE TO CALL CONTRACT MAINT AND HAVE THE LEAKS CHKED. I PROCEEDED TO THE COCKPIT TO FIND THE OTHER CAPT STANDING IN THE COCKPIT DOORWAY. I REQUESTED THE ACFT LOGBOOK SO I COULD WRITE UP THE DISCREPANCIES. HE TOLD ME 'I WILL TAKE CARE OF IT.' I INFORMED HIM THAT CONTRACT MAINT WAS ON ITS WAY TO THE ACFT. BEFORE I COULD FINISH THAT STATEMENT; HE REPLIED 'HOW LONG IS THAT GOING TO TAKE?' I INFORMED HIM THAT I DID NOT KNOW; BUT TO 'PLEASE HAND ME THE LOGBOOK SO I CAN ENTER THE APPROPRIATE DISCREPANCIES INTO THE ACFT LOG.' HIS REPLY WAS VERY SARCASTIC; 'I TOLD YOU THAT I WOULD TAKE CARE OF IT.' WITH THAT; I TURNED AROUND AND SAT IN THE PAX CABIN. I DID NOT WANT TO CREATE A SCENE IN FRONT OF THE PAX OR CREW MEMBERS. CONTRACT MAINT CAME AND WENT; AND WE DEPARTED FOR LAX. WHILE I WAS DEPLANING IN LAX; THE MECH THAT MET THE FLT WAS IN THE JETWAY WITH LOGBOOK IN HAND. HE APCHED ME AS I WAS DEPLANING FROM THE ACFT IN UNIFORM AND ASSUMED I WAS THE INBOUND CAPT. HE QUESTIONED ME ABOUT THE LOGBOOK. HE STATED THAT NO LOGBOOK ENTRIES AS TO HYD LEAKS OR ANY OTHER DISCREPANCIES WERE ENTERED IN THE LOG; OR ANY SIGNOFFS HAD BEEN MADE IN THE LOGBOOK; AND THAT TUS OPS SHOWED A MAINT DELAY. I INFORMED THE MECH THAT THE OTHER CAPT FLEW THE ACFT INBOUND FROM TUCSON; AND THAT HE TOLD ME THAT HE WOULD TAKE CARE OF THE DISCREPANCIES. I TOLD THE MECH THAT I WAS JUST DEADHEADING ONBOARD THE FLT. HE INQUIRED AS TO THE WHEREABOUTS OF THE OTHER CAPT. I TOLD HIM I DID NOT KNOW; BUT IF I SAW HIM IN THE TERMINAL; I WOULD INFORM HIM THAT MAINT IS LOOKING FOR HIM. MY FO AND I FOUND HIM UPSTAIRS. I APCHED HIM AND INFORMED HIM THAT MAINT WAS LOOKING FOR HIM AT GATE WITH REGARDS TO THE LOGBOOK; AND I STATED; 'YOU DID NOT ENTER ANY DISCREPANCIES IN THE LOGBOOK DID YOU?' HE REPLIED JUST AS SARCASTIC AS BEFORE; 'WHAT THE HELL IS IT TO YOU?' AND WITH THAT TYPE OF REPLY; I JUST TURNED AROUND AND WALKED AWAY FROM HIM. PROFESSIONAL STANDARD PERSONNEL WAS NOTIFIED ALONG WITH A CHIEF PLT.