(m)  
Make sure 0 shows for bit position 22.

 (n)  
Set the first officer's ADC select switch to the C position.

 (o)  
Make sure 1 shows for bit position 22.

 (p)  
Set the first officer's ADC select switch to the R position.

 (q)  
Make sure 1 shows for bit position 22.

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A 747-400 MAINTENANCE MANUAL
 (r)  Set the first officer's NAV select switch to the CDU C position.
 NOTE:____ The first officer's NAV select switch is on the P3 first officer's main instrument panel.
 (s) (t) (u) (v) (w) (x) (y) (z)  Make sure 0 shows for bit position 21.Set the first officer's NAV select switch to the CDU R position.Make sure 0 shows for bit position 21.Set the first officer's NAV select switch to the FMC L position.Make sure 0 shows for bit position 21.Set the first officer's NAV select switch to the FMC R position.Make sure 1 shows for bit position 21.Set the captain's NAV select switch to the CDU C position.
 NOTE:____ The captain's NAV select switch is on the P1 captain's main instrument panel.

 (aa) Make sure 0 shows for bit position 20.
 (ab) Set the captain's NAV select switch to the CDU L position.
 (ac) Make sure 0 shows for bit position 20.
 (ad) Set the captain's NAV select switch to the FMC R position.
 (ae) Make sure 1 shows for bit position 20.
 (af) Set the captain's NAV select switch to the FMC L position.
 (ag) Make sure 0 shows for bit position 20.

 S 865-298

 (16) Prepare the INPUT MONITORING page to monitor E/46/147/00:
 NOTE:____ Label 147 monitors these inputs:
 - Datalink program pin
 - ATS program pin
 - GPS program pin

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A
747-400 MAINTENANCE MANUAL
 (a)  
Push E/46/147/00 on the scratchpad for the center CDU.

 (b)  
Push the necessasry LSK to show E/46/147/00 below the PORT LBL SDI indication. 1) Make sure SAMPLE shows intermittently below E/46/147/00.

 S 735-293
 (17) Do the input check for label 147:
 (a)  
Make sure 1 shows for bit position 27.

 (b)  
Make sure 1 shows for bit position 28.

 (c)  
Make sure 1 shows for bit position 29.

 K. Left Flight Management Computer Analog Discrete to EIU Check
 S 865-186
 (1)  Open these circuit breakers:
 (a)  P7 Overhead Circuit Breaker Panel
 1) 7C1 FMCS FMC L
 2) 7C23 FMCS FMC R
 3) 7C26 FMCS A/T SERVO R
 4) 7F10 EIU C
 5) 7F15 EIU R

 S 865-185
 (2)  
Make sure the FMC master switch on the P2 pilot's center instrument panel is in the "L" position.

 S 735-187

 (3)  
Do the left FMC to left EIU check:

 (a)  Push and hold the captain's A/T disconnect switch and make sure the "AUTOTHROT DISC" indication shows on the EICAS display.
 NOTE: The captain's A/T disconnect switch is on the left
____
 throttle lever.

 (b)  Release the captain's A/T disconnect switch and make sure the "AUTOTHROT DISC" indication does not show on the EICAS display.
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A 747-400 MAINTENANCE MANUAL
 (4)  S 865-188Close this circuit breaker: (a) P7 Overhead Circuit Breaker Panel 1) 7F10 EIU C
　
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