NITROGEN GENERATION SYSTEM - DDG MAINTENANCE PROCEDURES
1. General
A. This procedure has the maintenance tasks for the Master Minimum Equipment List (MMEL)
maintenance requirements as shown in the Dispatch Deviations Procedures Guide (DDPG). These
tasks prepare the airplane for flight with systems/components that are inoperative.
B. The procedure also has tasks to put the airplane back to its usual condition.
C. These are the tasks for the components in the Nitrogen Generation System (NGS):
(1) MEL 47-1 Preparation - Nitrogen Generation System Inoperative
(2) MEL 47-1 Restoration - Nitrogen Generation System Inoperative
TASK 47-00-00-040-801
2. MMEL 47-1 (DDPG) Preparation - Nitrogen Generation System Inoperative
(Figure 901)
A. General
(1) This task is for operation of the airplane with the Nitrogen Generation System (NGS)
inoperative.
B. References
Reference Title
36-00-00-860-806 Remove Pressure from the Pneumatic System (P/B 201)
C. Location Zones
Zone Area
131 Center Section Wing Box, Body Station 540.00 to Body Station 663.75 - Left
212 Flight Compartment - Right
D. Access Panels
Number Name/Location
192CL ECS Access Door
E. Nitrogen Generation System Deactivation
SUBTASK 47-00-00-040-004
(1) Open these circuit breakers and install safety locks:
CAPT Electrical System Panel, P18-3
Row Col Number Name
ILF 402, 452, 509, 510, 523, 525-528, 576, 577, 971; 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
D 17 C01657 NITROGEN GEN CONT
ILF 568, 569, 581, 583, 585, 588-590, 592-599, 601-603, 606, 607, 610-615, 620, 625-627, 691-699,
833-835, 838, 980-999; ILF 567, 973 POST SB 737-47-1003
D 17 C01657 NITROGEN GENERATION CONTROL
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
47-00-00
Page 901
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ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details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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