(d)  
P42 5-Volt Lighting Main Instrument Panel 1) F/O'S PNL LTG

 S 024-004
 (3)  Remove the mach airspeed indicator:
 (a)  Loosen the two adjustment screws adjacent to the indicator (Fig. 401).
 CAUTION: CAREFULLY PULL THE INDICATOR FROM THE INSTRUMENT PANEL.
_______ TOO MUCH FORCE CAN CAUSE DAMAGE TO THE ELECTRICAL CABLE ON THE REAR OF THE INDICATOR.
 (b)  
Pull the indicator from the instrument panel.

 (c)  
Disconnect the electrical connector from the rear of the indicator.

 (d)  
Put dust caps on the electrical connections.

 TASK 34-12-21-424-005
 3. Mach Airspeed Indicator Installation
____________________________________
 A. Reference
 (1)  AMM 24-22-00/201, Manual Control
 B. Procedure
 S 864-006
 (1)  Make sure that these circuit breakers are open with the DO-NOT-CLOSE tags attached:
 (a)  
P18 Load Control Center
 1) A8, COMPUTER-1 AC
 2) A9, COMPUTER-1 (26V AC)

 (b)  
P6 Load Control Center
 1) B6, COMPUTER-2 26V AC
 2) B7, COMPUTER-2 AC

 S 864-007
 (2)  Make sure that the applicable circuit breakers are open with the DO-NOT-CLOSE tags attached:
 (a)  
P18 Load Control Center
 1) B10, MACH ASI (26V AC)

 (b)  
P6 Load Control Center
 1) C5, MACH ASI

 (c)  
P41 5-Volt Lighting Main Instrument Panel 1) CAPT'S PNL LTG

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 (d)  P42 5-Volt Lighting Main Instrument Panel 1) F/O'S PNL LTG
 S 424-008
 (3)  Install the mach airspeed indicator: (a) Remove the dust caps from the electrical connections. (b) Connect the electrical connector at the rear of the indicator.
 CAUTION:_______ CAREFULLY PUT THE INDICATOR INTO THE INSTRUMENT PANEL. TOO MUCH FORCE CAN CAUSE DAMAGE TO THE ELECTRICAL CABLE ON
 THE REAR OF THE INDICATOR.
 (c) (d)  Put the indicator into the instrument panel.Tighten the two adjustment screws adjacent to the indicator (Fig. 401).
 S 864-009
 (4)  Supply electrical power (AMM 24-22-00/201).
 S 864-010
 (5)  Remove the DO-NOT-CLOSE tags and close these circuit breakers: (a) P18 Load Control Center 1) A8, COMPUTER-1 AC 2) A9, COMPUTER-1 (26V AC) (b) P6 Load Control Center 1) B6, COMPUTER-2 26V AC 2) B7, COMPUTER-2 AC
 S 864-011
 (6)  Remove the DO-NOT-CLOSE tags and close the applicable circuit breakers:
 (a) (b) (c) (d)  P18 Load Control Center 1) B10, MACH ASI (26V AC)P6 Load Control Center 1) C5, MACH ASIP41 5-Volt Lighting Main Instrument Panel 1) CAPT'S PNL LTGP42 5-Volt Lighting Main Instrument Panel 1) F/O'S PNL LTG
 S 864-012
 (7)  Make sure the MACH, Vmo, and A/S warning flags do not show on the indicator.

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 864-013
 (8)  Remove electrical power if it is not necessary (AMM 24-22-00/201).
 TASK 34-12-21-024-014
 4.  Altimeter Removal_________________
 A. General
 (1)  
The captain's altimeter indicator (N39) is installed on the captain's instrument panel (P1). The first officer's altimeter indicator (N40) is installed on the first officer's instrument panel (P3).

 (2)  
The circuit breakers for the captain's indicator are on the P18 load control panel. The circuit breakers for the first officer's indicator are on the P6 load control panel.

 (3)  
The circuit breakers for the lighting of the captain's indicator are on the P41 5-volt lighting main instrument panel. The circuit breakers for the lighting of the first officer's indicator are on the P42 5-volt lighting main instrument panel .
　
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