FILLING AND BLEEDING FLIGHT CONTROL HYDRAULIC SYSTEMS (WITHOUT
Throughout this task, whenever a
connection is loosened to let air
escape from a hydraulic line, use a
container and cloths (E120) to catch
spilled fluid. Wear gloves (E186).
NO. 1 SYSTEM
Bleed flight control hydraulic pump (1) as follows:
Disconnect drain tube (2) from case drain
port (3) of pump.
Fill pump with hydraulic fluid (E199) through
port (3). Use hand oiler.
Connect tube (2) to port (3).
Loosen case drain fitting (4) at power control
Have helper rotate rotor blades through at
least ten complete turns by pulling blades
around in normal direction. Use blade
tiedown lines on forward blades.
While blades are being turned, let fluid
flow from case drain fitting (4) until air-free.
Operate the APU (Task 1-36).
Set POWER XFR NO. 1 switch (6) on cockpit
HYDRAULIC panel (7) to ON. Set FLT CONTR
switch (8) to NO. 1 ON.