What was found
PILOT NOTICED UTILITY HYDRAULIC POWER CYCLING EXCESSIVELY. GROUND RETRACT TEST SHOWED PROBLEM ONLY ON UPSIDE, ISOLATING THE PROBLEM TO NOSE GEAR ACTUATOR. RESEALED THE PISTON O-RING. SUBSEQUENT RETRACTION TESTS AND FLIGHT, OK. SUBMITTER NOTE: A60STA TB 109.62 - LUBRICATION OF NOSE GEAR ACTUATOR C/W EVERY 900 HRS OR 3 YEARS DOES NOT ADDRESS THIS AREA. IT WOULD BE ADVISEABLE TO RESEAL THIS PISTON SEAL AT THIS TIME.