A CANADAIR CL65 WAS DISPATCHED IN NON COMPLIANCE WITH A MAIN GEAR WARNING RPTED INCORRECTLY IN LOG. DIVERTED DUE TO MAIN GEAR WARNING.

Narrative

THE ARRIVING CREW BRIEFED ME OF A PROB WITH THE 3A HYD PUMP BEING WEAK CAUSING A GEAR DISAGREE WARNING MESSAGE ON THE INBOUND LEG. MAINT WAS IN THE ACFT AS I ARRIVED. THE WRITE-UP IN THE AML (ACFT MAINT LOG) STATED THAT THE PREVIOUS CREW GOT A 'SYS 3 HYD PRESSURE LOW CAUTION' MESSAGE. MAINT DEFERRED THE HYD SYS 3A PUMP. THE MEL REQUIRED THE 3B PUMP BE RUN CONTINUOUSLY. I ASKED MAINT ABOUT THE GEAR DISAGREE MESSAGE THE PREVIOUS CAPT RPTED AND HE STATED THAT HE AND THE PREVIOUS CAPT HAD DECIDED THE PROB WAS A WEAK SYS 3A PUMP; AND IF THEY WROTE UP THE 'GEAR DISAGREE MESSAGE' IT WOULD GND THE ACFT UNTIL THEY COULD SWING THE GEAR. I SUCCUMBED TO HIS ASSESSMENT OF THE PROB AND DEPARTED PER THE MEL PROCS. AFTER TKOF WHEN WE RETRACTED THE GEAR WE GOT A 'GEAR DISAGREE' WARNING MESSAGE AND THE L MAIN GEAR SHOWED NOT IN THE UP AND LOCKED POS. FOLLOWING OUR QRH AND CHKLISTS WE LOWERED THE GEAR; GOT 3 GREEN LIGHTS; CALLED DISPATCH AND RETURNED TO ZZZ. AFTER BLOCKING IN I WROTE UP THE GEAR DISAGREE WARNING MESSAGE IN THE AML. THIS INCIDENT WOULD NOT HAVE OCCURRED IF THE PREVIOUS CREW HAD WROTE UP THE PROB CORRECTLY.