1) P7 Overhead Circuit Breaker Panel a) 7C1 FMCS FMC L b) 7C23 FMCS FMC R c) 7B17 NAV RADIO MMR R d) 7B6 NAV RADIO MMR C
(b)
Do these steps to tune the left ILS receiver: 1) Push the NAV RAD key on the left CDU to show the ALTN NAV
RADIO page. 2) Put the test frequency into the CDU.
NOTE: Use a localizer frequency not used in other
____ parts of the system test.
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(c)
(d)
(e)
(f)
(g)
(h)
(i)
(j)
(k)
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747-400 MAINTENANCE MANUAL
3) Push the LSK that is adjacent to the ILS frequency display.
4) Make sure these results occur: a) The PFDs and the NDs show the test frequency. b) ILS L shows on the NDs as the source receiver.
Set the captain's EIU source select switch to L, R and then C.
NOTE: Stop for approximately 10 seconds at each position.
____
1) Make sure ILS L continues to show on the NDs.
Close this circuit breaker:
1) P7 Overhead Circuit Breaker Panel
a) 7B17 NAV RADIO MMR ROpen this circuit breaker: 1) P7 Overhead Circuit Breaker Panel
a) 7A6 NAV RADIO MMR LDo these steps to tune the right ILS receiver:
1) Push the NAV RAD key on the right CDU to show the ALTN NAV
RADIO page.
2) Put the test frequency into the CDU.
NOTE:____ Use a localizer frequency not used in other
parts of the system test.
3) Push the LSK that is adjacent to the ILS frequency display.
4) Make sure these results occur:
a) The PFDs and the NDs show the test frequency.
b) ILS R shows on the NDs as the source receiver.
Set the captain's EIU source select switch to L, R and then C.
NOTE: Stop for approximately 10 seconds at each position.
____
Make sure ILS R continues to show on the NDs.
Close this circuit breaker:
1) P7 Overhead Circuit Breaker Panel a) 7B6 NAV RADIO MMR C
Open this circuit breaker:
1) P7 Overhead Circuit Breaker Panel
a) 7B17 NAV RADIO MMR R
Do these steps to tune the center ILS receiver:
1) Push the NAV RAD key on the center CDU to show the ALTN NAV
RADIO page.
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747-400 MAINTENANCE MANUAL
2) Put the test frequency into the CDU.
NOTE: Use a localizer frequency not used in other
____ parts of the system test.
3) Push the LSK that is adjacent to the ILS frequency display.
4) Make sure these results occur: a) The PFDs and the NDs show the test frequency. b) ILS C shows on the NDs as the source receiver.
(l) Set the captain's EIU source select switch to L, R and then C.
NOTE: Stop for approximately 10 seconds at each position.
____
1) Make sure ILS C continues to show on the NDs.
(m) Close these circuit breakers:
1) P7 Overhead Circuit Breaker Panel
a) 7C1 FMCS FMC L
b) 7C23 FMCS FMC R
c) 7A6 NAV RADIO MMR L
d) 7B17 NAV RADIO MMR R
S 865-254
(2)
Turn off the test equipment and remove it.
S 865-255
(3)
Remove electrical power if it is not necessary (Ref 24-22-00/201).
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本文链接地址：747-400 AMM 飞机维护手册 导航 NAVIGATION 2(41)
