747-400 AMM 飞机维护手册 导航 NAVIGATION 1(161)

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 (a)  Make sure that IRS CTR comes into view on the main EICAS display for a short time.
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 (6)  Put the right IRU into the Ground Test mode from a CDU.
 (a)  Make sure that IRS RIGHT comes into view on the main EICAS display for a short time.
 H. Orientation Program Pin Test
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 (1)  
Open the 7C1 FMCS FMC L circuit breaker on the P7 panel.

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 (2)  
Open the 7C23 FMCS FMC R circuit breaker on the P7 panel.

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 (3)  
Set the HDG switch on the P2-4 panel to the NORM position.

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 (4)  
Set the IRS switch on the captain's source select panel to the L position.

 (a)  Make sure that the magnetic heading on the captain's primary flight display (PFD) is + or - 15 degrees of the heading on the standby compass.
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 (5)  Set the IRS switch on the captain's source select panel to the C position.
 (a)  Make sure that the magnetic heading on the captain's PFD is + or - 15 degrees of the heading on the standby compass.
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 (6)  Set the IRS switch on the captain's source select panel to the R position.
 (a)  Make sure that the magnetic heading on the captain's PFD is + or - 15 degrees of the heading on the standby compass.
 I. ADC Interface Test
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 (1)  Open these circuit breakers:
 (a)  P7 Overhead Circuit Breaker Panel
 1) 7A14, ADC R PWR

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747-400 MAINTENANCE MANUAL
 2)  7J15, ADC C PWR
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 (2)  Do a test of the ADC interface with the IRS.
 (a)  
Set the captain's ADC source select switch to the L position.

 (b)  
Set the captain's IRS source select switch to the L position.

 (c)  
Set the first officer's ADC source select switch to the L position.

 (d)  
Set the first officer's IRS source select switch to the R position. 1) Make sure that the vertical speed scale on the far right

 side of the captain's primary flight display (PFD) comes into view.

 (e)  
Set the captain's IRS source select switch to the C position.

 1)  Make sure that the vertical speed scale on the far right side of the captain's PFD comes into view.

 (f)  
Set the captain's IRS source select switch to the R position.

 1)  Make sure that the vertical speed scale on the far right side of the captain's PFD comes into view.

 (g)  
Close this circuit breaker:

 1)  P7 Overhead Circuit Breaker Panel
 a) 7J15, ADC C PWR

 (h)  
Set the captain's ADC source select switch to the C position.

 (i)  
Push and hold the functional test button on the front of the left ADC. 1) Make sure that the vertical speed scale on the far right

 side of the captain's PFD comes into view.

 (j)  
Set the captain's IRS source select switch to the L position.

 1)  Make sure that the vertical speed scale on the far right side of the captain's PFD comes into view.

 (k)  
Set the captain's ADC source select switch to the R position.

 (l)  
Set the first officer's ADC source select switch to the C position. 1) Make sure that the vertical speed scale on the far right

 side of the captain's PFD comes into view.
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A
747-400 MAINTENANCE MANUAL
 (m)  
Set the captain's IRS source select switch to the R position.

 1)  Make sure that the vertical speed scale on the far right side of the captain's PFD comes into view.

 (n)  
Release the functional test switch on the front of the left ADC.
　
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