TTP B1-L3 ATA 29A Beech 90 Series B2-L3 Hydraulic Power – Monitoring and indicating Hydraulic Fluid Low-Level Sensor A h ydraulic fluid l o w-l e v el sensor is on the motor end of the p o w e r pack. A HYD FLUID LO annu n - ciator illuminates w hen a l o w fluid e xists . Engine b leed ai r , r e gulated to 18 to 20 psi, is plumbed into the fill rese r v oir to pr e v ent c a vit a tion of the pump. A y ell o w HYD FLUID LO annunciator on the glare shield illuminates w hen the h ydraulic fluid in the seconda r y rese r v oir becomes l o w . An optical sensing unit on the motor end of the p o w e r pack contains the light source, senso r , and s witching circuit r y to trigger the fluid l o w annunciato r . The ...
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