B. Procedure
S 864-002
(1)
Open the applicable circuit breakers and attach DO-NOT-CLOSE tags for the instrument that you will remove.
S 034-003
(2)
Loosen the instrument.
CAUTION:_______ADJUST ONLY THE LARGER SCREW. IF YOU ADJUST THE SMALLER SCREW, THE CLAMP CAN COME LOOSE FROM THE PANEL.
(a)
Loosen the clamp adjustment screw(s).
(b)
Push on the clamp adjustment screw(s) to loosen the clamp.
S 024-004
(3)
Remove the instrument from the panel.
S 034-005
(4)
Disconnect the connectors.
(a) If it is applicable, put a cap on the connectors.
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747-400
MAINTENANCE MANUAL
CLAMP ADJUSTMENT SCREW (LARGE)
CLAMP MOUNTING SCREW (SMALL)
CLAMP ADJUSTMENT SCREW (LARGE)
ROUND INSTRUMENT INSTALLATION
Clamp Mounted Indicator Installaton
Figure 401
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747-400 MAINTENANCE MANUAL
TASK 31-10-01-404-006
3. Clamp-Mounted Instrument Installation (Fig. 401)_____________________________________
A. Access
(1) Location Zone
221 and 222 Control Cabin
B. Procedure
S 864-007
(1)
Make sure the applicable circuit breakers are open and have DO-NOT-CLOSE tags.
S 034-008
(2)
If it is applicable, remove the caps from the connectors.
S 434-009
(3)
Align the applicable instrument while you connect the connectors.
S 424-010
(4)
Install the instrument in the panel.
S 434-011
CAUTION: DO NOT TIGHTEN THE CLAMP ADJUSTMENT SCREWS TOO MUCH, OR YOU CAN
_______ DAMAGE THE INSTRUMENT.
(5)
Tighten the clamp adjustment screws to 5-8 pound-inches.
S 864-012
(6)
Remove the DO-NOT-CLOSE tags and close the applicable circuit breakers for the instrument that you installed.
S 714-013
(7)
Do the applicable operational test for the instrument that you installed.
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747-400 MAINTENANCE MANUAL
CAPTAIN'S MAIN INSTRUMENT PANEL - DESCRIPTION AND OPERATION
P1-3
P1-2
P1-1 P1-4
Captain's Main Instrument Panel
Figure 1
M48343
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747-400 MAINTENANCE MANUAL
PILOTS' CENTER INSTRUMENT PANEL - DESCRIPTION AND OPERATION
P2-4
P2-2 P2-1 P2-3
Pilots' Center Instrument Panel
Figure 1
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