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A
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~.............................................................. | Memory Location "400400" | ................................................................ | BIT | PIN NUMBER | NOMENCLATURE | ................................................................ | 15 | A 31 | Spare | ................................................................ | 14 | A 31 | CDU Location (1=Open=Not R or Not C-CDU)| ................................................................ | 13 | A 30 | CDU Location (1=Open=Not L or Not C-CDU)| ................................................................ | 12 | A 20 | FMC Port Select (1=Open=Onside FMC) | 2.......…............….........................................1
(4) The data that follows gives data on the CMC's INPUT MONITORING function. This function permits a check on FMCS bus activity from LRUs that have an interface.
The CDUs are monitored directly by the CMC.
The FMCs are monitored through the EIUs.
(a) The INPUT MONITORING page for CDUs will have this format:
INPUT MONITORING X/8
PORT LBL SDI
L-CDU: C/9/xxx/00
C-CDU: C/14/xxx/00
R-CDU: C/46/xxx/00
bits: xxxxxxxxxxxxxxxx
(32----24-----17)
bits: xxxxxxxxxxxxxxxx (16-----8------1)
Bits 1 thru 8 show the octal lable.
Bits 9 and 10 show the Source Destination Identifier (SDI).
Bits 11 thru 32 show the status of the busses.
A 1 will show a situation that has a failure unless it is in
parenthesis below.
~.......................................................... | LBL | SDI | BIT | NOMENCLATURE | ............................................................ | 350 | 00 | 12 | onside FMC->CDU bus | ............................................................ | 350 | 00 | 14 | offside FMC->CDU bus | ............................................................ | 350 | 00 | 27 | EFIS CP(1=failure shown by the CD)| ............................................................ | 350 | 00 | 28 | IRS(1=failure shown by the CDU) | 2.......…......…......…....................................1
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MAINTENANCE MANUAL
(b) The INPUT MONITORING page for FMCs will have this format:
INPUT MONITORING X/8
PORT LBL SDI
L-FMC: E/42/xxx/00
R-FMC: E/46/xxx/00
bits: xxxxxxxxxxxxxxxx
(32----24-----17)
bits: xxxxxxxxxxxxxxxx (16-----8------1)
Bits 1 thru 8 show the octal lable.
Bits 9 and 10 show the Source Destination Identifier (SDI).
Bits 11 thru 32 show the status of the interface.
A 1 will show a situation that has a failure unless it is in
parenthesis below.
~.......................................................... | LBL | SDI | BIT | NOMENCLATURE | ............................................................ | 160 | 00 | 20 | NAV source select onside (1=selected) | ............................................................ | 160 | 00 | 21 | NAV source select offside (1=selected) | ............................................................ | 160 | 00 | 22 | ADC source select F/Os (1=R or C) | ............................................................ | 160 | 00 | 23 | ADC source select CAPT (1=L or C) | ............................................................ | 160 | 00 | 24 | source/dest ident (1=L) | ............................................................ | 160 | 00 | 25 | MAG/TRUE switch (1=MAG) | ............................................................ | | | | | ............................................................ | 350 | 00 | 11 | VOR-L -> FMC bus | ............................................................ | 350 | 00 | 12 | VOR-R -> FMC bus | ............................................................ | 350 | 00 | 13 | ADC-L(C) -> FMC bus | ............................................................ | 350 | 00 | 14 | ADC-R(C) -> FMC bus | 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 导航 NAVIGATION 3(171)
