What was found
LT MAIN GEAR GREEN LIGHT DID NOT ILLUM & LT MAIN RED LIGHT REMAINED ILLUM. ALT EXTENSION LIGHT CHECKED & FOUND GEAR WAS NOT EXTENDED. ALT EXTENSION DOOR CLOSED, & RECEIVED GREEN LIGHT ON GEAR. RE CHECKED ALT GEAR LIGHT & HAD 3 GREEN. MX JACKED ACFT IN HANGAR & RAN GEAR UP & DOWN SEVERAL TIMES. NO FAILURES FOUND. LT SEQUENCE VALVE & SOLENOID VALVE REPLACED. GEAR RAN UP & DOWN, NO FAILURES. OPS & LEAK CHECK GOOD. NR 2 HYD SYS IN NOSE WW BLED. CHECKED NR 1 MAIN LANDING GEAR AUXILIARY & MAIN ACTUATOR LINES FOR SIGNS OF AIR. NO AIR FOUND. PERFORMED PSEU SYS TEST & FOUND FAULT CODE 55. RE RACKED PSEU & PERFORMED SYS TEST TWICE, NO FAULTS. INSPECTED MLG ACTUATOR ASSEMBLIES & LUBED FITTINGS.