(g) When the performance test is started, the NGS controller monitors the NGS system
performance. The NGS controller will stop the test if there is a change in the airplane
configuration as noted in the previous steps. Other events that will cause the test to stop
include an overtemperature condition or an NGS fault is recorded by the controller.
(h) The test can also be stopped manually if the MENU or ON/OFF push button controls are
pushed during the test. If the system test is stopped before the test is fully done, all
latched system faults that were present prior to the start of the system test will continue to
be recorded as latched faults.
(i) If the performance test does not start, or the test is stopped by the NGS controller, one of
these BDU display messages will show:
1) INHIBITED: SYS PRESS LOW/INVLD
2) INHIBITED: PACK OFF
3) INHIBITED: REFUEL VLV OPEN
4) INHIBITED: A/C ID INVALID
5) INHIBITED: SEE EXISTING FAULTS
6) INHIBITED: WOW = IN AIR
B. References
Reference Title
47-00-00-800-801 Ground Operation of the Nitrogen Generation System (P/B 201)
C. Location Zones
Zone Area
131 Center Section Wing Box, Body Station 540.00 to Body Station 663.75 - Left
D. Access Panels
Number Name/Location
192CR ECS Access Door
192DR ECS High Pressure Access Door
E. Main Menu
SUBTASK 47-31-02-740-038
(1) Do this task: BDU Main Menu, TASK 47-31-02-740-801.
(a) Push the BDU control panel up or down arrows or the NO button until the display
message, GROUND TESTS? shows.
F. Ground Test List
SUBTASK 47-31-02-740-039
(1) Make sure GROUND TESTS? shows on the display.
(a) Push the YES button.
1) The menu items for the ground test list will show on the display.
(2) These are the ground test list items:
(a) ELECTRICAL TEST?
(b) SYSTEM TEST?
(c) NGS PERF LO FLOW?
(d) NGS PERF HI FLOW?
(e) DISPLAY TEST?
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
47-31-02
Page 235
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ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details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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