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 (Continued)
F. Air Conditioning Compartment Precautions
SUBTASK 47-00-00-910-003
WARNING
OBEY THE SUBSEQUENT STEPS FOR ACCESS PANELS IDENTIFIED WITH
A NITROGEN GENERATION SYSTEM PLACARD. IF THERE IS A LEAK IN THE
NITROGEN GENERATION SYSTEM, IT WILL DECREASE THE OXYGEN IN
THE AIR THAT YOU BREATHE. IF YOU BREATHE AIR THAT DOES NOT HAVE
SUFFICIENT OXYGEN, DANGEROUS HEALTH CONDITIONS CAN QUICKLY
OCCUR.
WARNING
WHEN YOU DO A TEST OF THE SYSTEM, MAKE SURE THAT THERE IS
SUFFICIENT AIRFLOW IN THE AREA. USE LIFE SUPPORT EQUIPMENT IF
YOU THINK THAT THERE IS A HIGH NITROGEN CONCENTRATION. LOW
OXYGEN LEVELS IN THE AIR ARE DANGEROUS TO PERSONNEL.
(1) Obey these precautions for maintenance tasks in the air conditioning compartment and the left
ram air duct bay:
(a) Make sure that the L PACK selector switch, on the P5-10 air conditioning panel, is in the
OFF position.
(b) If the L PACK selector switch is in the AUTO position and the pack is on, do these steps:
1) Make sure that a colleague is present to help you if necessary.
2) Use extreme caution when entering the left air conditioning compartment or the
wheel well.
3) If there is an obvious NGS or NEADS leak, get out of the area and shut down the
pneumatic air supply.
G. Main Wheel Well Precautions
SUBTASK 47-00-00-910-004
WARNING
OBEY THE SUBSEQUENT STEPS FOR ACCESS PANELS IDENTIFIED WITH
A NITROGEN GENERATION SYSTEM PLACARD. IF THERE IS A LEAK IN THE
NITROGEN GENERATION SYSTEM, IT WILL DECREASE THE OXYGEN IN
THE AIR THAT YOU BREATHE. IF YOU BREATHE AIR THAT DOES NOT HAVE
SUFFICIENT OXYGEN, DANGEROUS HEALTH CONDITIONS CAN QUICKLY
OCCUR.
WARNING
WHEN YOU DO A TEST OF THE SYSTEM, MAKE SURE THAT THERE IS
SUFFICIENT AIRFLOW IN THE AREA. USE LIFE SUPPORT EQUIPMENT IF
YOU THINK THAT THERE IS A HIGH NITROGEN CONCENTRATION. LOW
OXYGEN LEVELS IN THE AIR ARE DANGEROUS TO PERSONNEL.
(1) Before you go into the wheel well do these steps:
(a) Make sure the L PACK selector switch, on the air conditioning panel, is in the OFF
position.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
47-00-00
Page 205
D633A101-ILF Oct 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF 402, 451, 452, 494-500, 503, 504, 509, 510, 514, 523-528, 541, 560-564, 567-569, 574-577, 581, 583, 585,
588-590, 592-599, 601-603, 606, 607, 610-615, 620, 625-627, 671, 672, 691-699, 832-835, 838, 856-858, 947,
948, 968-973, 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, 501, 502, 507, 508, 512, 513, 516, 518, 531-533, 535-537, 542,
552-556, 571-573, 686, 703, 707-710, 803-813, 821, 822, 831, 836, 837, 841, 842, 851, 852, 854, 855, 861-863,
871-874 POST SB 737-47-1002 OR POST SB 737-47-1003 OR POST SB 737-47-1015; ILF 491-493, 515,
519, 520, 530, 557, 559 POST SB 737-47-1002 OR POST SB 737-47-1015
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