SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
MCS--4200/7200 Multi--Channel SATCOM System
23--20--35
15 Jul 2006
Honeywell International Inc. Do not copy without express permission of Honeywell.
Page 6--15
Table 6-5.
Level 1 Failure Messages (cont)
Level 1
Code
Description
Failure Message
54
CTU/SDU
CEPT--E1 bus from the CCS
55
SCDU1/SDU or
WSC1/SDU
No. 1 SCDU or WSC bus
56
SCDU2/SDU or
WSC2/SDU
No. 2 SCDU or WSC bus
57
(ACARS MU/CMU)2/SDU
No. 2 AFIS/ACARS unit bus
59
(CFDIU/CMC)/SDU
CFDS bus
5A
IRS--PRI/SDU
Primary IRS bus
5B
IRS--SEC/SDU
Secondary IRS bus
5C
HPA--HI GAIN/SDU
High Gain Antenna HPA bus
5F
HPA--LO GAIN/SDU
Low Gain Antenna HPA bus
62
BSU--(TOP/L)/SDU
Top/port BSU bus
64
BSU--R/SDU
Starboard BSU bus
65
(not applicable)
Radio Management Panel bus
66
SCDU3/SDU or
WSC3/SDU
No. 3 SCDU or WSC bus
71
OTHER SDU/THIS SDU
Bus from other SDU in a dual system
73
FMC1/SDU
No. 1 FMC bus
74
FMC2/SDU
No. 2 FMC bus
Inactive Bus Inputs to other LRU:
90
SDU M--CTRL/HPA--HI
Multicontrol bus to HGA HPA from SDU
96
SDU M--CTRL/HPA--LO
Multicontrol bus to LGA HPA from SDU
98
SDU M--CTRL/BSU--(T/L)
Multicontrol bus to top/port BSU from SDU
9A
BSU--R XTALK/BSU--L
Crosstalk bus to port BSU from starboard BSU
9C
SDU M--CTRL/BSU--R
Multicontrol bus to starboard BSU from SDU
9D
BSU--L XTALK/BSU--R
Crosstalk bus to starboard BSU from port BSU
9E
SDU/HSU
Control bus to HSU from SDU
A1
SDU/WSC1
Bus to WSC1 from SDU
A2
SDU/WSC2
Bus to WSC2 from SDU
A3
SDU/WSC3
Bus to WSC3 from SDU
