TM 55-1520-240-T
11-1.3 FLIGHT CONTROL SYSTEM OPERATIONAL CHECK (Continued)
11-1.3
TASK
RESULT
1.
2.
3.
4.
5.
6.
7.
Set FLT CONTR switch (1) to NO. 1 ON.
Press pilot CENTERING DEVICE RELEASE
switch (2). Press pilot CP BRAKE TRIG-
GER switch (3). Move pilot pitch and roll
control grip in a box pattern. Move pilot
thrust grip up and down. Move pilot di-
rectional pedals forward and aft. Check
all flight controls as cockpit controls are be-
ing moved.
Control travel shall be smooth and easy.
Hydraulic fluid leakage shall not exceed that specified
in TM 55-1520-240-23.
If control travel is stiff or binding, check controls for
interference or defective bearings. Correct interfer-
ence or replace defective bearings.
If unusual noises are heard, replace noisy compo-
nent.
NOTE
It is not unusual for swashplate slider bearings to
make some noise and chatter during ground
operational checks.
If hydraulic fluid is observed, refer to TM 55-
1520-240-23 to determine allowable leakage.
Release pilot CENTERING DEVICE RE-
LEASE switch (2) and CP BRAKE TRIG-
GER switch (3).
Set FLT CONTR switch (1) to NO. 2 ON.
Repeat step 2 and step 3, then go to step 6.
Set FLT CONTR switch (1) to BOTH.
Press pilot CENTERING DEVICE RELEASE
switch (2). Press pilot CP BRAKE TRIGGER
switch (3). Move thrust control down to detent.
Move pitch and roll control and pedals to neu-
tral. Release CENTERING DEVICE RELEASE
and CP BRAKE TRIGGER switches (2 and 3).
FOLLOW-ON MAINTENANCE:
TM 55-1520-240-23:
Hydraulic power off.
Electrical power off.
Battery disconnected.
Flight control closet backup panel installed.
Flight control closet acoustic blanket installed.
Tunnel covers closed.
Pylon work platforms closed.
Forward work platforms closed.
END OF TASK
Change 10
11-7/(11-8 blank)
