(f) Make sure that the oxygen analyzer, COM-7456, is a minimum of 18 in. (0.5 m) above
the ground.
(g) Disconnect the cap on the GSE O2 test port.
NOTE: The GSE O2 test port is located in the aft section of 192CL, on beam 41 near the
bottom.
(h) Connect the sense line, SPL-11507, to the GSE O2 test port.
SUBTASK 47-00-00-720-019
(4) Do these steps to energize the oxygen analyzer, COM-7456:
(a) Push the ON/OFF button on the control panel.
(b) Make sure that the green LED light comes on.
(c) Let the oxygen analyzer, COM-7456, warm up for two minutes.
NOTE: When the oxygen analyzer, COM-7456, warms up, it will over-shoot the true
oxygen content value, and then show the correct % oxygen value.
(d) Do not push the ON/OFF button again during the test.
(e) Do not push the SPAN (Calibration) button during the test.
H. Functional Test for the Nitrogen Generation System - NGS PERF LO FLOW
NOTE: This procedure does a check of the NEA purity for the ASM (low flow mode).
SUBTASK 47-00-00-740-073
(1) Do this task: Ground Operation of the Nitrogen Generation System, TASK 47-00-00-800-801.
(a) Make sure that you complete and pass the BDU System Test.
(b) Make sure that the BDU shows the NGS PERF LO FLOW during the NGS ground
operation.
(c) Let the NGS warm up.
NOTE: The system can take up to 30 minutes to warm up in cold ambient temperatures.
Before you begin the function test, make sure the BDU temperature value is
160 ±10°F (71.1 ±5.6°C).
SUBTASK 47-00-00-740-074
(2) When the BDU temperature display is 160 ±10°F (71.1 ±5.6°C), push the MENU button on the
BDU.
SUBTASK 47-00-00-740-076
(3) Push the YES button on the BDU.
SUBTASK 47-00-00-740-077
(4) Make sure the NGS shutoff valve opens and the functional test starts.
NOTE: The NGS shutoff valve is found in the FWD LH ECS bay between the bleed air inlet
duct and the ozone converter.
(a) Make sure the display on the BDU shows these messages:
1) GSE O2 SNS: XX.X% (or GSE O2 SNS: WARM during warmup mode).
NOTE: xx.x is the O2% reading from the Oxygen Sensor.
2) P: YY PSIA
NOTE: YY = ASM outlet current pressure.
3) T: SZZZ F
NOTE: ZZZ = ASM inlet current temperature.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
47-00-00
Page 503
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ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details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
To Next Page
Loading...
