TASK 47-21-00-700-804
3. NEADS - Air Pressure Leak Check
(Figure 602)
A. General
(1) This procedure is a scheduled maintenance task.
B. References
Reference Title
28-11-00-910-802 Fuel Tank - Purging and Tank Entry (P/B 201)
28-11-31-000-801 Center Tank Access Door Removal (P/B 401)
28-11-31-400-801 Center Tank Access Door - Installation (P/B 401)
28-26-00 P/B 201 DEFUELING - MAINTENANCE PRACTICES
36-00-00-860-806 Remove Pressure from the Pneumatic System (P/B 201)
47-21-04-000-801 Primary Backflow Prevention Check Valve Removal (P/B 401)
47-21-04-400-801 Primary Backflow Prevention Check Valve Installation (P/B 401)
47-21-11-400-801 Drain Cap Installation (P/B 401)
C. Tools/Equipment
NOTE: When more than one tool part number is listed under the same "Reference" number, the
tools shown are alternates to each other within the same airplane series. Tool part numbers
that are replaced or non-procurable are preceded by "Opt:", which stands for Optional.
Reference Description
SPL-7455 Test Equipment - Leak and Pressure
737-600, -700, -800
Part #: G47001-19 Supplier: 81205
STD-1280
Source - Air, Regulated, Dry Filtered, 0-30 PSIG
D. Consumable Materials
Reference Description Specification
G00034 Cotton Wiper - Process Cleaning Absorbent
Wiper (Cheesecloth, Gauze)
BMS15-5 Class A
G00150 Tape - Nitto P-421 NAT (Formerly Permacel)
PTFE Film Tape
G50135 Leak Detector - Liquid, Non-Corrosive Soap
Compound
MIL-PRF-25567
G50310 Tape - Nitto P-412 (Formerly Permacel)
Ribbon Dope Thread Sealant Tape
A-A-58092
E. Location Zones
Zone Area
131 Center Section Wing Box, Body Station 540.00 to Body Station 663.75 - Left
531 Left Wing - Center Fuel Tank, Rib 1 to Rib 5
F. Access Panels
Number Name/Location
192BL ECS Ram Air Inlet Mixing Duct Panel - Forward
192CL ECS Access Door
531AB Center Tank Access Door - Wing Station 168
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
47-21-00
Page 604
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ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details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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