What was found
NOSE GEAR WOULD NOT STAY RETRACTED. JACKED ACFT & CHECKED DIMENSION ON NOSE STRUT. SWING GEAR SEVERAL TIMES COULD NOT DUPLICATE AT THIS TIME. INSP NLG UPLOCK ASSY & FOUND TO BE BINDING. REMOVED UPLOCK ACTUATOR & FOUND ALL COMPONENTS ATTACHED TO ACTUATOR SHAFT ARE CORRODED. BOSS FOR CLEVIS PIN ON ACTUATOR SHAFT IS ALSO CORRODED. R&R SN 4170, ACTUATOR, SN 4824, WITH NEW PARTS IAW MM CHAPTER 32-30-05. INSTALLED ACTUATOR & COMPLIED WITH ALL FUNCTIONAL & LEAK CHECKS. ALL CHECKED GOOD. VERIFIED INSTALLATION OF THE UPLOCK HOOK & OPERATION, GEAR SWING WITH FREE FALL & BLOW DOWN. RESET GEAR & BLED, SERVICED NITROGEN & SAFETIED EMER GEAR CABLE. ALL OPS & LEAK CHECKS GOOD.