TM 1-1520-240-MTF4-16NOTEPhasing the rotary-wing system shall be accom-plished with a minimum crew of two; one crewmanto install the phasing blocks and one to turn the for-ward rotor blades.1. Rotor Phasing.a. Obtain two phasing blocks. If necessary,locally manufacture them from aluminumalloy sheet, 3/8 inch thick,b. Gain access to the right side of the aftswashplate. Rotate the rotor head to align apitch link lug on the rotating swashplate withthe upper flange of the swiveling actuator.c. Install one phasing block over the lug andthe flange. Leave in place.d. Gain access to the left side of the forwardswashplate. If the rotor system is properlyphased, a pitch lug on the rotatingswashplate will align with the upper flange ofthe swiveling actuator. Install a phasingblock over the lug and flange to verifyalignment.e. If the lug and flange are not in alignment, therotor system must be phased. Refer to TM55-1520-240-23 for procedure.G. 712 NO. 1 and NO. 2 ENGINE STARTReference:TM 1-1520-240-10CAUTIONThe flight controls must be manned anytimethe helicopter is on the ground with the rotorsturning
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