TM 55-1520-240-T11-1.3 FLIGHT CONTROL SYSTEM OPERATIONAL CHECK (Continued)11-1.3TASKRESULT1.2.3.4.5.6.7.Set FLT CONTR switch (1) to NO. 1 ON.Press pilot CENTERING DEVICE RELEASEswitch (2). Press pilot CP BRAKE TRIG-GER switch (3). Move pilot pitch and rollcontrol grip in a box pattern. Move pilotthrust grip up and down. Move pilot di-rectional pedals forward and aft. Checkall flight controls as cockpit controls are be-ing moved.Control travel shall be smooth and easy.Hydraulic fluid leakage shall not exceed that specifiedin TM 55-1520-240-23.If control travel is stiff or binding, check controls forinterference or defective bearings. Correct interfer-ence or replace defective bearings.If unusual noises are heard, replace noisy compo-nent.NOTEIt is not unusual for swashplate slider bearings tomake some noise and chatter during groundoperational 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 RELEASEswitch (2). Press pilot CP BRAKE TRIGGERswitch (3). Move thrust control down to detent.Move pitch and roll control and pedals to neu-tral. Release CENTERING DEVICE RELEASEand 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 TASKChange 1011-7/(11-8 blank)
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