What was found
BOS - FLT 2037 - AFTER TAKEOFF FROM BOS, CLIMBING THROUGH 800 FEET, CAPTAIN RETRACTED LANDING GEAR AND RECEIVED AN UNSAFE NOSE GEAR INDICATION. CAPTAIN ACCOMPLISHED CHECKLIST AND EXTENDED LANDING GEAR. NORMAL GEAR INDICATIONS WERE RECEIVED. FLIGHT RETURNED TO FIELD AT BOS AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE REMOVED AND REPLACED THE NOSE LANDING GEAR LOCK ACTUATOR PER MM 32-33-21. PERFORMED SATISFACTORY GEAR SWING. OPERATIONAL CHECK AND LEAK DHECK GOOD. (M)