captain's ND.

 (k)  
Set the NAV switch on the first officer's source select module to the CDU R position. 1) Make sure that CDU R shows on the lower left corner of the

 first officer's ND.

 (l)  
Set the AIR DATA switches on the source select modules to the R position. 1) Make sure the PFDs show the altitude tape.

 (m)  
Open this circuit breaker.
 1) P7, Overhead Circuit Breaker Panel.
 a) 7A14, ADC R PWR

 2)  Make sure the altitude tape goes away and the PFDs show the ALT flag.

 (n)  
Close this circuit breaker.

 1)  P7, Overhead Circuit Breaker Panel.
 a) 7A14, ADC R

 S 864-047
 (6)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 (7)  
Install the clock into the module (AMM 31-25-01/401).

 S 864-034

 (8)  
Remove the electrical power, if it is not necessary (AMM 24-22-00/201).

 S 414-030
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747-400 MAINTENANCE MANUAL
 S 864-048
 (9) Put the airplane to its usual condition.
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747-400 MAINTENANCE MANUAL
 REMOTE LIGHT SENSOR - REMOVAL/INSTALLATION
__________________________________________
 1.  General_______
 A.  This subject has two tasks. The first task is to remove the remote light sensor from the glare shield. The second task is to install the remote light sensor into the glare shield. The installation task includes a test of the installation of the sensor.
 B.  Two remote light sensors are on the top of the glare shield (Fig. 401). The sensor attaches to the glare shield by two mounting screws. Five electrical wires connect the sensor to a wire terminal strip. The two mounting screws and the terminal strip are at the bottom of the glare shield. You must remove the glare shield to get the access to the mounting screws and the terminal strip.
 TASK 31-61-08-024-030
 2.  Remote Light Sensor Removal___________________________
 A.  Standard Tools and Equipment
 (1)  Tool - Removal/Insertion, M15570-20
 B.  References
 (1)  AMM 25-13-01/401, Pilot's Glare Shield Assembly
 C.  Access
 (1)  Location Zone
 221 Control Cabin, LH
 222 Control Cabin, RH

 D.  Procedure
 S 864-019
 (1)  Open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P7, Overhead Circuit Breaker Panel
 1) 7F11, EFIS CONT L
 2) 7F16, EFIS CONT R

 S 014-020
 (2)  Remove the glare shield to get access to the remote light sensor, the mounting screws, and the wire terminal strip (AMM 25-13-01/401).
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747-400
MAINTENANCE MANUAL

TOP VIEW SIDE VIEW
A-A B-B

Remote Light Sensor
Figure 401

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