for Right Outboard Transmitter 312A Access Door 315A Access Door
D. Set the Elevator and the Stabilizer to Neutral
S 865-011
(1)
Do this task: "Supply Electrical Power" (AMM 24-22-00/201).
S 865-012
(2)
Do this task: "Supply Hydraulic Power" (AMM 29-11-00/201).
S 865-013
(3)
Make sure the FLT CONTROL HYD POWER TAIL switches on the P461, Pilots' Overhead Maintenance Panel are in NORM.
S 015-014
(4)
Open the access door 312A.
S 865-015
WARNING: MOVE ALL PERSONS AND EQUIPMENT AWAY FROM THE STABILIZER AND
_______ THE ELEVATOR SURFACES BEFORE YOU MOVE THE STABILIZER. THE STABILIZER AND THE ELEVATOR SURFACES CAN MOVE QUICKLY AND CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(5)
Use the STAB TRIM ALTN switches to set the stabilizer and the elevators to the neutral position.
(a)
Make sure the "B" dimension is 7.42 |0.05 inches (Fig. 501).
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A
747-400
MAINTENANCE MANUAL
SEE B
STABILIZER
TRIM DRIVE
A
MECHANISM
A
SEEA A
STABILIZER INBOARD ELEVATOR
SEE C BALL SCREW STOP A-A
B DIMENSION BALL NUTSTOP INBOARD TIP OF TRAILING EDGE TO ALIGN WITHIN SILVER BAND |0.40 INCH
1`
INDEX PLATE
B C
WITH ONLY HYDRAULIC SYSTEMS
NO. 1 AND 4 PRESSURIZED,
INBOARD ELEVATORS MAY SHIFT
OUT OF NEUTRAL SLIGHTLY.
Elevator and Stabilizer Neutral Setting
Figure 501
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747-400 MAINTENANCE MANUAL
BONDING JUMPER
SEE E
OUTBOARD SEE B ELEVATOR POSITION
SEE A TRANSMITTER
STABILIZER
RIB
INBOARD ELEVATOR BONDING
POSITION TRANSMITTER JUMPER
CONTROL ROD SEE C
OUTBOARD ELEVATOR
B
0.39 MAX
SEE E
THUMB NUT
STABILIZER RIB
0.53 MAX
ELECTRICAL
CONNECTOR C CONTROL ROD
INBOARD OUTER
SEE D
ELEVATOR
RIG PININDEX HOLEMARKS INNER
RIG PIN HOLE
A
THUMBNUT 0.56 MAX
TRANSMITTER RIG PIN BRACKET
SLOT
0.40 MAX
TRANSMITTER CLAMPING CRANK D SCREWS
SHAFTNOTE:LEFT ELEVATOR POSITION TRANSMITTERS CLAMPING SCREWSHOWN. RIGHT TRANSMITTERS ARE ALMOST
E
THE SAME.
Elevator Position Indicating System Adjustment
Figure 502
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747-400 MAINTENANCE MANUAL
S 865-016
(6)
Set the STAB TRIM 2 and 3 switches on the control stand to CUTOUT.
S 865-017
(7)
Set the FLT CONTROL HYD POWER TAIL switches on the P461, Pilots' Overhead Maintenance Panel to SHUTOFF.
(a)
Make sure the four VALVE CLOSED lights come on.
S 865-018
(8)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P7, Overhead Circuit Breaker Panel
1) 7E6, STAB TRIM L CONT
2) 7E7, STAB TRIM L S/O VALVE
3) 7E19, STAB TRIM R CONT
4) 7E20, STAB TRIM R S/O VALVE
(b)
P180, DC Power Distribution Panel
1) 180H8, ELEV/RUD VLV SYS 1
2) 180E7, ELEV/RUD VLV SYS 2
3) 180H23, ELEV/RUD VLV SYS 3
4) 180E22, ELEV/RUD VLV SYS 4
S 015-019
(9)
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本文鏈接地址：747-400 AMM 飛機(jī)維護(hù)手冊 飛行操縱 FLIGHT CONTROLS 3(109)
