22-11-02
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A
747-400 MAINTENANCE MANUAL
TASK 22-11-02-002-013
4. Mode Select Switch and Lamp Removal (Fig. 201)___________________________________
A. General
(1) This task has steps to remove a mode select switch and to remove a lamp for the mode select switch.
B. Special Tools and Equipment
(1) 50445 - Extractor Tool, Jay-El Product Inc.,
23301 S. Wilmington, Carson, CA 90745
C. Access
(1) Location Zones
221 Control Cabin, LH
222 Control Cabin, RH
D. Procedure
S 862-027
(1) Open these circuit breakers and attach the DO-NOT-CLOSE tags:
(a)
P6 Main Power Distribution Panel 1) 6E21, FLT DK LIGHTS PANEL GLARESHIELD 2) 6F19, FLT DK LIGHT PILOT MISC IND 1 3) 6F20, FLT DK LIGHT PILOT MISC IND 2 4) 6L1, FLT DK LIGHT STBY INST
(b)
P7 Overhead Circuit Breaker Panel
1) 7D7, FLT CONT CMPTR SERVO L
2) 7D12, FLT CONT CMPTR SERVO C
3) 7D14, FLT CONT CMPTR SERVO R
4) 7E9, MCP L
5) 7E18, MCP R
S 032-014
(2) Use your fingernails (or the extractor tool) in the grooves at the sides of the lens module to pull the lens module out.
NOTE: The lens module is now held by a link pin and a bail plate.
____
(a) Push the link pin to the rear of the groove on the bail plate to remove the lens module if it is necessary.
S 022-029
(3) To remove a lamp, pull the lamp out of the rear of the lens module.
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747-400
MAINTENANCE MANUAL
S 022-030
(4) To remove the switch, do these steps:
(a) Turn the jackscrew counterclockwise until it stops.
NOTE: The jackscrew is at the top in the switch module, and
____ behind the mating plate for the lens module.
(b) Pull the switch module out from the case.
TASK 22-11-02-402-017
5. Mode Select Switch and Lamp Installation (Fig. 201)
________________________________________
A. General
(1) This task has steps to install a mode select switch and to install a lamp for the mode select switch.
B. References
(1)
22-10-00/501, Autopilot/Flight Director System
(2)
24-22-00/201, Manual Control
C. Access
(1) Location Zones
221 Control Cabin, LH
222 Control Cabin, RH
D. Procedure
S 862-022
(1) Make sure that these circuit breakers are open and the DO-NOT-CLOSE tags are attached:
(a)
P6 Main Power Distribution Panel 1) 6E21, FLT DK LIGHTS PANEL GLARESHIELD 2) 6F19, FLT DK LIGHT PILOT MISC IND 1 3) 6F20, FLT DK LIGHT PILOT MISC IND 2 4) 6L1, FLT DK LIGHT STBY INST
(b)
P7 Overhead Circuit Breaker Panel
1) 7D7, FLT CONT CMPTR SERVO L
2) 7D12, FLT CONT CMPTR SERVO C
3) 7D14, FLT CONT CMPTR SERVO R
4) 7E9, MCP L
5) 7E18, MCP R
S 422-031
(2) To install the switch, do these steps:
(a)
Turn the jackscrew counterclockwise until the jackscrew stops before you install the switch module.
(b)
Push the switch module into the case.
NOTE: Put the side that has the word "TOP" in the up position.
____
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747-400
MAINTENANCE MANUAL
CAUTION:_______ DO NOT USE THE JACKSCREW TO PULL THE SWITCH MODULE INTO ITS POSITION. THIS CAN CAUSE DAMAGE TO THE SWITCH MODULE AND CASE.
(c) Push the switch module with your finger while you lightly turn the jackscrew clockwise. 1) Continue to push the switch module and turn the jackscrew clockwise until the jackscrew is tight.
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