What was found
(CAN) DURING MAIN ROTOR REPLACEMENT, A LARGE AMOUNT OF ROTATIONAL PLAY, APPROXIMATELY 2 INCHES DISCOVERED, MAX SHOULD BE 0.060 INCH. UPPER YOKE ASSY BEARINGS IMPROPERLY INSTALLED, NOT PRESSED IN DEEP ENOUGH AND AT AN ANGLE, SCORING THE YOKE. INBOARD ARM ATTACH BOLT WAS NOT PROPERLY TORQUED. INBOARD ARM AND OUTER BOLT HOLE BADLY ELONGATED. REPLACED YOKE ASSY, SPACERS, BOLT AND ARM.