(4)
Set the MCDP to off.
(5)
Remove electrical power if not necessary (Ref 24-22-00).
S 864-027
S 864-028
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757 MAINTENANCE MANUAL
AFCS GO-AROUND SWITCHES - REMOVAL/INSTALLATION
______________________________________________
1. General_______
A. Six AFCS go-around switches are found in the engine thrust levers. Three switches are installed in the side of each thrust lever. The Removal/Installation procedure is the same for each set of switches.
TASK 22-11-04-004-001
2. Remove the AFCS Go-Around Switches (Fig. 401).__________________________________
A. Access
(1) Location Zones
211/212 Flight Compartment
B. Remove the AFCS Go-Around Switches
S 864-002
(1)
Set the two F/D switches on the MCP to OFF.
S 864-003
(2)
Open these circuit breakers on the overhead circuit breaker panel, P11, and attach DO-NOT-CLOSE tags:
(a)
11E16, MODE CONT PNL LEFT
(b)
11E17, FLT CONT COMPUTER POWER LEFT
(c)
11E18, FLT CONT COMPUTER SERVO LEFT
(d)
11E20, FLIGHT CONT CMPTR PWR CENTER
(e)
11E21, FLIGHT CONT CMPTR SERVO CENTER
(f)
11E34, MODE CONT PNL RIGHT
(g)
11E35, FLT CONT CMPTR PWR RIGHT
(h)
11E36, FLT CONT CMPTR SERVO RIGHT
(i)
11F14, TMC AC
(j)
11F15, TMC DC
(k)
11F16, TMC SERVO
(3)
Remove the screws and the cover from the thrust lever.
(4)
Remove the screws from the applicable switch and actuator assembly.
(5)
Remove the heat shrink tubing from the wiring terminals.
(6)
Unsolder the wires from the switch.
S 034-004
S 024-005
S 034-006
S 024-007
TASK 22-11-04-404-008
3. Install the AFCS Go-Around Switches (Fig. 401)___________________________________
A. Equipment
(1) Heat gun - commercially available
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757
MAINTENANCE MANUAL
AFCS GO-AROUND SWITCH
NOTE: SPRING REMOVED FOR CLARITY.
AFCS Go-Around Switches Installation
Figure 401
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MAINTENANCE MANUAL
B. Consumable Materials
(1) G02104 Heat Shrink Tubing, R876, color yellow,
Raychem Corp, 300 Constitution Dr., Menlo Park,
CA 94025
C. References
(1)
22-00-02/201, Autoflight BITE
(2)
24-22-00/201, Electrical Power - Control
D. Access
(1) Location Zones
211/212 Flight Compartment
E. Install the AFCS Go-Around Switches
S 434-009
(1)
Apply the heat shrink tubing. Do not shrink the tubing until after the wires are soldered to the switch.
S 424-010
(2)
Solder the wires to the new switch.
S 434-011
(3)
Shrink the heat shrink tubing over the wire terminals.
S 424-012
(4)
Install the switch and actuator assembly with the screws.
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