MENU
ON
OFF
NO
YES
YES NO
MENU
(blank display)
ON
OFF
ON
OFF
In Air
ON
OFF
AFTER
ONE SECOND
NO INPUT FOR 5 MINS.
(EXCEPT BDU TEST IN
PROCESS)
COLD START
(NGS CONT POWER-UP)
MAINTENANCE MODE =
CMCS ACTIVE MODE
Switch Inactive
WOW = In Air
Inhibited CMCS Active
BDU shutdowns
after 3 frames
Existing Faults?
MAIN MENU
PREVIOUS MODE
1500580 S0000273106_V3
BDU Standby Mode
Figure 203/47-31-02-990-809
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
47-31-02
Page 207
D633A101-ILF Oct 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF 402, 452, 509, 510, 523, 525-528, 568, 569, 576, 577, 581, 583, 585, 588-590,
592-599, 601-603, 606, 607, 610-615, 620, 625-627, 691-699, 833-835, 838, 971, 980-999;
ILF 101, 151, 156-199, 301, 304, 308, 310, 314, 315, 317-319, 323, 331-399, 401, 405,
406, 409, 410, 412, 416, 424, 425, 427-429, 451, 501-504, 507, 508, 512-514, 516, 518,
524, 531-533, 535-537, 541, 542, 552-556, 560-562, 567, 571-575, 671, 672, 686, 703,
707-710, 803-813, 821, 822, 831, 832, 836, 837, 841, 842, 851, 852, 854-858, 861-863,
871-874, 947, 948, 968-970, 972, 973 POST SB 737-47-1003
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