What was found
GEAR DISAGREE WARNING MESSAGE, COMPLIED WITH QRH & RECEIVED 3 DOWN & LOCKED INDICATIONS. HOWEVER, UNABLE TO STOW LANDING GEAR MANUAL RELEASE HANDLES, CYCLING GEAR DID NOT WORK. COMPLIED WITH EMERGENCY EXTENSION PROCEDURE. FLT#6202 UPON ARRIVAL AT ACFT THE LANDING GEAR MANUAL RELEASE HANDLE STOWED NORMALLY. REPLACED THE MLG SELECTOR VALVE IAW AMM. PERFORMED SEVERAL CYCLES OF THE LANDING GEAR EXTENSION/RETRACTION SYSTEM & THE MANUAL LANDING GEAR RELEASE SYSTEM IAW AMM. OPERATIONS CHECKED GOOD. PN ON: 601R75145-1 PN OFF: 61750 SN ON: 0970 SN OFF: 247