0071 00TM 1-6625-724-13&P0071 00-6TASK 1 – TEST EQUIPMENT INSTALLATION/CHECKOUTPROCEDURE 1: AIRCRAFT PREPARATION – Main Rotora. Ensure that blade static phasing has been accomplished as per applicable maintenance manual.b. Check accelerometer type. Select appropriate “AIRCRAFT TYPE” (AH64, AH64NB, AH64D, or AH64D2) frommain screen on CADU. Select manager option (F4), then select SETUP and select ACCELEROMETER. ForAH64 and AH64D script files, verify accelerometer channels 5-14 are defined as “AH64 Acc”. For AH-64NB andAH64D2 script files verify, accelerometers 1-14 are set to “Wil M991”, or to the type that is being used for theexternal wiring of accelerometers. c. Ensure that the black paint on the underside of each main rotor blade is uninterrupted from the leading edge tothe trailing edge along the blade span from the start of the swept tip to tab pocket 10 (i.e., no shiny leading edgevisible on the blade bottom). If not, touch up with flat black spray paint, being careful to avoid runs and not overpaint. NOTETrack measurements may be in error if the color contrastof the blade is not consistent in the area that the trackersees the blade. Those errors may not be obvious from themeasured track numbers, but they will degrade theeffectiveness of the AVA-computed corrections.d. Ensure that blades have been correctly and visibly marked as 1 through 4. Blade one is over the nose when thedouble interrupter is over the magnetic pick-up. Blade 2 will be on the right, Blade 3 Aft and Blade 4 on aircraftleft as viewed from the pilot’s seat. Ensure that blade tab pockets have been visibly numbered from 0 through 10.e. Ensure magnetic pickup gap is between 0.030 to 0.070 inches. Check the interrupters to ensure that they are notdeformed.f. If new blades have been installed or if previously tracked blades have been installed in different positions, zeroout all trim tabs (pockets 0 through 12) and remove all balance weights. g. If blades are installed which have been previously tracked together in the same positions, measure and recordtrim tab settings. If the trim tabs are bent in a uniform direction, don’t adjust tabs before flying. If the trim tabs arebent in opposing directions, zero the trim tabs for all blade pockets (0-12). If trim tabs in pockets 0-3 are not 0,this should be noted for possible future trouble-shooting. h. If a FM antenna is installed, it should be removed before running aircraft for balance to prevent damage toantenna. The antenna should be installed when balance is complete.PROCEDURE 2: EQUIPMENT INSTALLATION (SPU INTERFACE)Figure 1. Typical AVA Test Setup Configuration
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