What was found
DURING CLIMB OUT, NR 1 SERVO CAUTION LIGHT ILLUMINATED, THE PILOT THEN FOLLOWED THE CHECKLIST PROCEDURES. IT REOCCURRED AGAIN BEFORE LANDING. THE INDICATION WAS A MOMENTARY SERVO JAM, UPON LANDING THE MECHANIC FOUND CONNECTORS CORRODED ON NR 1 HYDRAULIC MODULE AND NR 1 SIDE OF MAIN ROTOR AFT SERVO, CLEANED THE CONNECTORS AND CHECKED THE HYDRAULIC SYSTEM WITH THE HYDRAULIC MULE IAW MM, FOLLOWED BY AN OPERATION CHECK AND FOUND TO BE SERVICEABLE. THE AIRCRAFT WAS RETURNED TO SERVICE.