What was found
HOBBS, 1,124.1 HOURS. NOSE GEAR DOORS WOULD NOT RETRACT (CLOSE) AFTER GEAR RETRACTION. NOSE GEAR DOOR ACTUATOR FOUND LEAKING HYDRAULIC FLUID SEVERELY. DISASSEMBLED ACTUATOR, FOUND A BACK-UP RING MISSING ON PISTON ALLOWING O-RING TO ROLL AND SPLIT. UNIT REQUIRES TWO BACK-UP RINGS. INSTALLED PIPER REPAIR KIT PN 765-330 IAW 32-30-00, PAGES 21-22. SWUNG GEAR, OPS CHECK GOOD.