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22-13-01
ALL ú ú 01 Page 406 ú Jun 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 864-034
(4)
Put the FLT CONTROL HYD POWER WING 1, 2, 3, and 4 switches to the SHUTOFF position. The switches are on the Pilot's Overhead Maintenance Panel (P461).
S 864-035
(5)
Open these circuit breakers and attach the DO-NOT-CLOSE tags:
(a) P7 Overhead Circuit Breaker Panel
1) 7D12, FLT CONT CMPTR C SERVO
2) 7D13, FLT CONT CMPTR C PWR
3) 7E9, MCP L
4) 7E18, MCP R
S 834-036
(6)
Put in the #2 and #3 rigging pins (Fig. 401).
S 484-062
(7)
Install the control wheel straightedge tool (Fig. 401).
G. Procedure
S 164-037
(1)
Clean the mating surfaces where the LAS attaches to the aircraft structure.
S 424-038
(2)
Install the LAS.
(a)
Hold the LAS (6) in position.
(b)
Install the mounting bolts (3), washers (4), and nuts (5).
(c)
Attach the control rod to the LAS crank arm with the bushing (2) and bolt (1).
CAUTION: DO NOT PERMIT CONTAMINATION TO GET INTO THE HYDRAULIC
_______ PORTS OR THE ELECTRICAL PORT. THE LAS IS A SENSITIVE DEVICE AND CONTAMINATION CAN CAUSE FAILURE.
(d)
Remove the caps from the hydraulic lines and the hydraulic ports.
(e)
Install the hydraulic lines on the LAS (6).
NOTE: Clean the hydraulic fluid from the airplane surfaces and
____ components. The fluid can cause corrosion.
(f)
Remove the caps from the electrical connector and the LAS electrical port.
(g)
Install the electrical connector on the LAS (6).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
22-13-01
ALL ú ú 01 Page 407 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 764-063
(3)
With a bonding meter, measure the resistance between the LAS and the bare metal airplane structure. Make sure it is less than 3.0 milliohms (0.003ohms).
S 394-039
(4)
Apply a fillet seal to the mating surfaces where the LAS attaches to the airplane structure. Use BMS 5-95 sealant.
S 834-040
(5)
Remove the #2 and #3 rigging pins.
S 094-041
(6)
Remove the control wheel straightedge tool.
H. Test the Lateral Autopilot Servo (LAS)
S 864-042
(1)
Supply the electrical power (Ref 24-22-00/201)
S 864-044
(2)
Make sure these circuit breakers are closed and the DO-NOT-CLOSE tags are removed:
(a)
P7 Overhead Circuit Breaker Panel
1) 7D12, FLT CONT CMPTR C SERVO
2) 7D13, FLT CONT CMPTR C PWR
3) 7D17, AILERON TRIM
4) 7D18, OUTBOARD AILERON LOCKOUT
5) 7E9, MCP L
6) 7E18, MCP R
(b)
P180 DC Power Distribution Panel
1) 180E6, LATERAL CONT VLV SYS 2
2) 180E21, LATERAL CONT VLV SYS 4
3) 180H7, LATERAL CONT VLV SYS 1
4) 180H22, LATERAL CONT VLV SYS 3
S 864-064
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.
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