TM 1-6625-724-13&P0069 000069 00-17PROCEDURE 3: H-60 SERIES AIRCRAFT TRIM TAB ADJUSTMENTSNOTETrim tab adjustments change the vertical track of ablade.Bending a trim tab down will cause a blade to dive withincreased airspeed.Bending a trim tab up will cause a blade to climb withincreased airspeed.a.Mark tab measurement stations as shown in figure 10. Use light colored paint or non-corrosive marker toaccurately define each station on the trailing edge.b.Set measuring plate on the blade surface, aligning the three vertical pins with the trailing edge of the trim tab(see figure 10).c.Measure and record the tab setting at each of the six trim tab measuring stations. Ensure that the center pin isright over the station mark.Figure 10. Trim Tab Measurementd.Remove the measuring plate and set aside for use during bending process.NOTEIf a blade is to be tabbed up, the table correction (thenumber of mils recommended on the diagnostics screenof the AVA) is to be added to the initial measurement. Ifa blade is to be tabbed down, then the table correction(the number of mils recommended on the diagnostics
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