TASK 47-00-00-790-802
3. Nitrogen-Enriched Air Distribution System (NEADS) Lines - Leak Check
(Figure 603)
NOTE: This procedure is a scheduled maintenance task.
A. General
(1) This task has one or more steps which are a means to satisfy Airworthiness Limitation
Instruction (ALI) requirements. An ALI note will follow the step to which it applies. Any step or
sub-step that precedes or follows an ALI identified step is not subject to the ALI requirement.
NOTE: This is applicable to Airworthiness Limitation 47-AWL-07.
(2) This tasks inspects the NEADS lines between the ASM and the flame arrestor at the rear spar
for damage and does a check for leaks in the NEADS lines between the ASM and the flame
arrestor at the rear spar.
B. References
Reference Title
21-00-00-800-803 Supply Conditioned Air with a Cooling Pack (P/B 201)
21-00-00-800-804 Remove Conditioned Air Supplied by a Cooling Pack (P/B 201)
28-22-15-700-801 Engine and APU Fuel Feed, Shroud, Fuel Vent Line and
Couplings, and NEADS Lines (if installed) Dent Criteria -
Inspection/Check (P/B 601)
36-00-00-860-801 Supply Pressure to the Pneumatic System (Selection) (P/B 201)
36-00-00-860-806 Remove Pressure from the Pneumatic System (P/B 201)
47-00-00-010-801 Nitrogen Generation System (NGS) Precautions (P/B 201)
47-00-00-800-801 Ground Operation of the Nitrogen Generation System (P/B 201)
47-00-00-910-802 Airworthiness Limitation Precautions (P/B 201)
47-21-00-700-802 Drain Cap - Fuel Leak Check (P/B 601)
47-32-01 P/B 401 NGS SHUTOFF VALVE - REMOVAL/INSTALLATION
49-11-00-860-802 APU Usual Shutdown (P/B 201)
71-00-00-700-819-F00 Stop the Engine Procedure (Usual Engine Stop) (P/B 201)
C. Consumable Materials
Reference Description Specification
G00034 Cotton Wiper - Process Cleaning Absorbent
Wiper (Cheesecloth, Gauze)
BMS15-5 Class A
G50135 Leak Detector - Liquid, Non-Corrosive Soap
Compound
MIL-PRF-25567
D. Location Zones
Zone Area
131 Center Section Wing Box, Body Station 540.00 to Body Station 663.75 - Left
133 Main Landing Gear Wheel Well, Body Station 663.75 to Body Station 727.00 - Left
212 Flight Compartment - Right
E. Access Panels
Number Name/Location
192BL ECS Ram Air Inlet Mixing Duct Panel - Forward
192CL ECS Access Door
192DR ECS High Pressure Access Door
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
47-00-00
Page 612
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ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details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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