What was found
ALL LANDING GEAR EXTENDED ON ITS OWN WITH GEAR HANDLE IN OFF POSITION DURING CLIMBOUT AT 18,000 FEET AND 290 KNOTS. THE GEAR LIGHTS INDICATED THREE GREEN AND THREE RED. THE GEAR HANDLE WAS PLACED TO UP AND THE GEAR RETRACTED WITH NORMAL INDICATIONS. NO ABNORMAL FLIGHT CHARACTERISTICS WERE NOTED AND THE FLIGHT WAS CONTINUED WITHOUT FURTHER PROBLEM. THE GEAR EXTENDED NORMALLY FOR LANDING AT IAH. MAINTENANCE PERFORMED A LANDING GEAR CONTROL SYSTEM ADJUSTMENT/TEST PER MM 32-31-00, PAGE 501 AND SYSTEM CHECKS WERE GOOD. A NOSE/MAIN GEAR MANUAL EXTENSION SYSTEM TEST WAS ALSO PERFORMED IAW MM 32-34-00 AND 32-35-00 AND ALL CHECKS WERE GOOD. IN ADDITION, A LANDING GEAR OPERATION ABOVE DESIGN SPEED CONDITION INSPECT