Beech 90 Series

  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 ...

  TTP B1-L3 ATA 29 Beech 90 Series B2-L2 Hydraulic Power An electrical l y-controlled h ydraulic p o w e r pack e xtends and retracts the main and nose landing gear assem b lies. The landing gear assem b lies comprise the foll o wing: •   Hydraulic p o w e r pack •   T ubing •   Rese r v oir •   Hydraulic actuators •   Bra k e system •   Accumulator •   Hydraulic fluid l e v el sensor system           Th e mai n an d nos e landin g gea r assem b lies e xten d an d retrac t h ydraulical l y . Prima r y com - ponent s o f th e  landin g gea r h ydrauli c system includ e a h ydrauli c p o w e r pac k an d h ydraulic actuator s o n eac h landin g gea r . Po w e r pac k pres sur e no r mal l y dr i v e s th e h ydrauli c actuators.         Three h ydraulic lines supp l y pressure to the nose ...