B. References
(1) AMM 25-22-01/401, Main Passenger Cabin Ceiling Panels
C. Special Tools and Equipment
(1) G76002-14 Protractor - Thrust Levers, FWD and REV or G76002-15 Protractor - Thrust Levers, FWD and REV (preferred)
D. Standard Tools and Equipment
(1) Digital Multimeter - Range 0-50 (|0.01) volts RMS; Commercially available
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
E. Access
(1)
Location Zone
211 Main Passenger Cabin - Nose to First Door, LH
212 Main Passenger Cabin - Nose to First Door, RH
221 Control Cabin LH
222 Control Cabin RH
F.
Procedure
S 032-085-N00
(1) Disconnect the applicable electrical connector for the microswitch pack.
(a)
P8
(b)
P9
(c)
P10
(d)
P11
S 862-086-N00
(2)
Set all forward thrust levers to the idle stop position.
S 862-142-N00
(3)
Set all reverse thrust levers to the stow position.
S 862-087-N00
(4)
AIRPLANES WITHOUT SYNC LOCKS; Set the forward thrust lever of the switch which must be adjusted to a position between 7.5 and 8.5 degrees from the idle stop.
S 862-145-N00
(5)
AIRPLANES WITH SYNC LOCKS; Set the forward thrust lever of the switch which must be adjusted to a position between 9.5 and 10.5 degrees from the idle stop.
(a) Keep the forward thrust lever in this position.
S 482-088-N00
(6)
Connect the ohmmeter between pins 4 and 6 on the applicable
electrical connector (P8, P9, P10, or P11).
(7)
Loosen the jamnut (5) 5 full turns.
(8)
Turn the outer sleeve (6) counterclockwise for several turns.
S 032-089-N00
S 832-090-N00
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S 832-091-N00
(9)
Turn the sleeve (6) clockwise, while you hold the plunger (8) with no movement, until the switch opens (infinite resistance).
S 432-093-N00
(10)
Tighten the jamnut (5) while you hold the plunger (8) and sleeve (6) with no movement.
NOTE: Make sure that the position of the the plunger and sleeve
____
does not change.
S 712-094-N00
(11) Move the thrust levers through the full forward and reverse movement.
(a) Make sure the switch pack mechanism operates smoothly and the springs keep the outer plungers against the mechanism of operation.
S 862-095-N00
(12)
Put all thrust levers to the idle stop position and all reverse thrust levers to the stowed position.
S 762-096-N00
(13)
Do a check of the switch continuity with the steps that follow:
(a) Connect an ohmmeter to the connector plug and pins shown in the table. 1) AIRPLANES WITHOUT SYNC LOCKS;
Make sure you have the resistance shown.
NOTE: For the switch resistance at the Thrust Lever
____ Position, the switches should not change state between the idle stop position and the 7 degree position. For the Reverse Thrust Lever Position, the switches should not change state between the stowed position and the 15 degree position.
2) AIRPLANES WITH SYNC LOCKS; Make sure you have the resistance shown.
NOTE: For the switch resistance at the Thrust Lever
____ Position, the switches should not change state between the idle stop position and the 9 degree position. For the Reverse Thrust Lever Position, the switches should not change state between the stowed position and the 15 degree position.
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本文链接地址：747-400 AMM 飞机维护手册 发动机控制 ENGINE CONTROLS(40)
