S 864-068
WARNING:_______ MAKE SURE PERSONNEL STAY A MINIMUM OF 6 FEET AWAY FROM THE
VERTICAL STABILIZER WHEN THE HF SYSTEM TRANSMITS. RF ENERGY
FROM THE HF COMMUNICATION ANTENNA CAN CAUSE INJURIES TO
PERSONNEL.
(1)
Make sure the HF system does not transmit.
S 394-018
(2)
Apply a layer of Corrosive Preventive Compound MIL-C-11796 (AMM 20-30-03/201) to all smooth surfaces of bolts (6).
S 984-019
(3)
Put the servo (5) into mounting position on the vertical stabilizer.
S 424-020
(4)
Install the servo with washers (7) and bolts (6).
S 034-021
(5)
Remove the caps from the hydraulic ports on the servo and the hydraulic lines.
S 434-023
(6)
Install new packing (9, 12) in the hydraulic pressure and hydraulic return lines.
S 434-024
(7)
Install the filter (10) in the hydraulic pressure line.
S 434-022
(8)
Connect the hydraulic lines to the servo and tighten by hand.
S 434-025
(9)
Connect the servo output to the torque tube and link assembly (4) with bolt (1), washer (2), and nut (3).
S 494-059
(10)
Set the torque wrench to 100-120 pound-inches.
S 434-060
(11)
Tighten the hydraulic pressure line union (8) to 100-120 pound-inches.
(12)
Set the torque wrench to 125-150 pound-inches.
(13)
Tighten the hydraulic return line union to 125-150 pound-inches.
S 494-061
S 434-062
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757 MAINTENANCE MANUAL
S 434-026
(14) Connect the electrical connector to the servo.
F. Test the Yaw Damper Servo
S 864-028
(1)
Supply electrical power (AMM 24-22-00/201).
S 864-029
(2)
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:
(a)
11A18, YAW DAMPER LEFT
(b)
11F34, YAW DAMPER RIGHT
(c)
11C6, CSEU 1L AC
or
FLT CONT ELEC 1L AC
(d)
11C7, CSEU 1L DC
or
FLT CONT ELEC 1L DC
(e)
11C8, CSEU 2L AC
or
FLT CONT ELEC 2L AC
(f)
11C9, CSEU 2L DC
or
FLT CONT ELEC 2L DC
(g)
11G17, CSEU 1R AC
or
FLT CONT ELEC 1R AC
(h)
11G18, CSEU 1R DC
or
FLT CONT ELEC 1R DC
(i)
11G27, CSEU 1R AC
or
FLT CONT ELEC 2R AC
(j)
11G28, CSEU 2R DC
or
FLT CONT ELEC 2R DC
S 864-063
WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES WHEN
_______ HYDRAULIC POWER IS SUPPLIED. AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, AND STABILIZER ARE FULLY POWERED SURFACES. INJURY TO A PERSON OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
(3) Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:
(a)
11H17, FLT CONT SHUTOFF TAIL LEFT
(b)
11H18, FLT CONT SHUTOFF TAIL CTR
(c)
11H28, FLT CONT SHUTOFF TAIL RIGHT
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MAINTENANCE MANUAL
(4) S 984-031Put the L, C, and R FLT CONTROL SHUTOFF switches in the ON position. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：757 AMM 飞机维护手册 自动飞行 AUTOFLIGHT 2(63)
