0011 00TM 1-6625-724-13&P0011 00-62.DOstop making corrections when within acceptable levels. The diagnostic algorithm will always calculate acorrection even though the airframe levels are within spec. At low vibration levels, the predicted correctionswill generally improve track, but not make significant vibration level improvements.3.DOuse the Edit Adjustables to limit the number of corrections. The diagnostic routine will calculatecorrections for all locations not constrained by the aircraft setup file. Many times by using this editor, you canreduce the number of corrections to be made and still reach the desired limit. If this is the case, use the editorand put an N for the particular correction and review the predicted response. If the predicted response iswithin limits, follow the new set of corrections.4.DOmake the corrections properly. The diagnostics won't work if the corrections are installed improperly.5.DOmonitor the vibration/track convergence. Generally there should be steady improvements in vibration andtrack levels for each round of corrections. If this is not happening, there may be other abnormal mechanicalconditions that are preventing a proper solution. Improvements of greater than 50% per round ofadjustments should be anticipated for rough aircraft.6.DOcompare the previous predicted response vs. the actual response. They should generally be close. Ifthey are drastically different, there may be an abnormal mechanical condition that will prevent the diagnosticsfrom working properly.7.DOmonitor the track spread. Even though many of the diagnostic aircraft setups weigh vibrationimprovements more importantly than track spread, if the calculated correction results in a large track spreadthere may be other abnormal mechanical faults.8.DON'Tkeep making corrections without an improvement in levels. When all else fails it may be time to do aflat track on the ground and start over.9.DON'Tfollow the recommendations blindly. The operator is still responsible for the airframe maintenance,and the operator's judgment will make the AVA an effective tool. If some of the corrections don't make sense,don't implement them. Corrections that don't make sense could be caused by a mechanical fault in the rotorthat is influencing the rotor diagnostics.f.SummaryThe diagnostics capability of the AVA allows the simultaneous prediction of weight, pitch link, trim tab and otheradjustments for configured aircraft. The advanced measurement capability along with a sophisticated diagnosticalgorithm results in a system that typically corrects normal rotor track and balance problems within a few flights.The Test States, measurements, and diagnostics are custom tailored for each airframe by the aircraftconfiguration file. The diagnostic algorithm utilizes all the track and vibration measurements made at each of thetest conditions to come up with an optimum solution, which minimizes vibration and track over the completeoperating envelope. Weighting factors within the aircraft configuration file allow a trade off between track andvibration levels allowing specific test conditions or types of vibration to be corrected at the expense of other testconditions or vibration levels.END OF WORK PACKAGE
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