MD-82 CREW FOUND AN IMPROPER SIGN-OFF IN THE ACFT MAINT LOG. THEY INFORMED THE ACR MAINT CTLR WHO SCHEDULED CONTRACT MAINT TO REINSPECT THE ACFT.

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SHOWING UP ON JUN/WED/O3 AND GOING THROUGH THE LOGBOOK AS WE ARE RECEIVING THE ACFT FOR THE FIRST FLT OF THE DAY; WE NOTICED THAT THERE WAS A WRITE UP THE PREVIOUS DAY THAT READ IN THE DISCREPANCY REMARKS: 'FOUND SMALL POOL OF HYD FLUID BEHIND NOSE GEAR.' THE CORRECTIVE ACTION REMARKS READ: 'INSPECTED NOSE AREA. NO LEAKS NOTED. SUSPECT POSSIBLE NOSE STEERING ACTUATOR LEAK. OK FOR FLT.' NOTICING THERE WAS NOT ANY FURTHER CORRECTIVE ACTION TAKEN FOR THE 'SUSPECTED NOSE STEERING ACTUATOR LEAK' WE CALLED MAINT CTL. HAVING TALKED WITH TECHNICIAN HE SAID 'WHAT; THAT'S THE WRITE UP OR SIGN OFF?' WHEN I INFORMED HIM THAT WAS THE SIGN OFF; HE SAID 'THAT'S WRONG.' HE PUT ME ON HOLD TO TALK TO SOMEONE ELSE AND WHEN HE CAME BACK TO ME HE SAID 'WE'LL HAVE TO CALL MAINT OUT TO TAKE CARE OF IT.' CONTRACT MAINT CAME OUT TO INSPECT THE AIRPLANE AND FOUND A LEAK AROUND THE NOSE LNDG GEAR METERING VALVE. THE WRITE-UP BY CONTRACT MAINT READS IN THE DISCREPANCY REMARKS: '... EVIDENCE OF A HYD LEAK. NOSE GEAR STEERING ACTUATOR.' THE CORRECTIVE ACTION READS: 'FOUND LEAK AT NOSE LNDG GEAR METERING VALVE. SECURE LOOSE FITTING. NO FURTHER LEAKS NOTED. OPS CHK NORMAL.' I AM FILING THIS RPT AS I FEEL THERE WAS MECHANICAL RPT BY A PLT; WITH A SIGNOFF BY A MECH 'NO LEAKS NOTED;' BUT MAKING REF TO A 'SUSPECTED POSSIBLE NOSE STEERING ACTUATOR LEAK.' NO CORRECTIVE ACTION WAS TAKEN TOWARD THE SUSPECTED PROB WITH FLTS BEING MADE AFTER THE ORIGINAL LOGBOOK ENTRY AND PRIOR TO OUR FLT NUMBER.