(DEGREES) EICAS DISPLAY (UNITS OF TRIM) STAB TRIM INDICATOR
3.00 ~ ~ ~ ~ ~ 9.00 6.00 3.00 0.00 12.00 9 6 3 (NEUTRAL) 0 15 12
12.3
12.3 ELEVATORS
12.3
12.3
STAB
FLAP HANDLE
PEDAL
1 10.00
2 10.00
STAB RUDDER
3 10.00
10.00
16.2
1
~ ~ ~
10.00
16.2
2
10.00
3 COLUMN
OUTBD TE ASYM DATE 02SEP90 GMT 18:54:04
10.00
1
2
3
~
~
~
10.00
10.00
FLIGHT CONTROLS
MAINTENANCE PAGE AUXILIARY EICAS DISPLAY
Stabilizer Trim Position Indicating System EICAS Displays Figure 2
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27-48-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
M7882 STAB POSN N311 STABILIZER POSN XMTR - RIGHT INDICATOR - F/O (P8)
Stabilizer Trim Position Indicating System Schematic Figure 3
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
STABILIZER TRIM INDICATING SYSTEM - ADJUSTMENT/TEST
___________________________________________________
1. General_______
A. This subject has two tasks. The first task is an operational test of the stabilizer trim indicating system.
B. The second task is a system adjustment of the stabilizer trim indicating system. For the adjustment you must set the stabilizer to the transmitter neutral position. The aircraft needs to be in an aft CG condition before starting the test. It is also necessary to adjust the transmitter control rod until the stabilizer position readout on the EICAS flight controls maintenance page is zero.
TASK 27-48-00-715-001
2. Operational Test - Stabilizer Trim Indicating System____________________________________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 29-11-00/201, Main Hydraulic Supply System
(3)
SSM 27-48-01
(4)
WDM 27-48-11
B.
Access
(1)
Location Zone
221 Control Cabin, LH
222 Control Cabin, RH
C.
Do the Stabilizer Trim Indication Operational Test
(1)
Do this task: "Supply Electrical Power" (AMM 24-22-00/201).
S 865-002
S 865-003
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(2) Do this task: "Supply Hydraulic Power" (AMM 29-11-00/201).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
SEE A
SEE B
UPPER
GIMBAL
HYDRAULIC BRAKES
STABILIZER TRIM CONTROL MODULES
"B"
B
HORIZONTAL STABILIZER
HORIZONTAL STABILIZER JACKSCREW
STABILIZER TRIM LIMIT SWITCHES
TRIM DRIVE MECHANISM
LOWER GIMBAL
HYDRAULIC AFT MOTORS
A
Stabilizer Trim Position Indicating System
Figure 501
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