E. Location Zones
Zone Area
131 Center Section Wing Box, Body Station 540.00 to Body Station 663.75 - Left
211 Flight Compartment - Left
212 Flight Compartment - Right
F. Access Panels
Number Name/Location
192BL ECS Ram Air Inlet Mixing Duct Panel - Forward
G. Install the Altitude Sensor
SUBTASK 47-42-01-100-001
(1) Remove the used sealant from the ground clamp [3], fasteners, and bonding jumper [7].
SUBTASK 47-42-01-110-001
(2) Prepare these components for an electrical faying surface bond (SWPM 20-20-00):
(a) Mating surface of the altitude sensor [1].
(b) Mating surface of the ground clamp [3].
SUBTASK 47-42-01-420-001
(3) Do these steps to install the altitude sensor [1]:
NOTE: The altitude sensor [1] is oriented with the keyway clocked at the 9 o'clock position.
(a) Install the ground clamp [3] on the altitude sensor [1].
1) Install the screw [4], washers [5], and nut [6] to attach the bonding jumper [7].
2) Tighten the screw [4] to 31 ±3 in-lb (3.5 ±0.3 N·m)
(b) Put the two clamps [8] on each end of the altitude sensor [1].
(c) Align the clamps [8] with the mounting holes on the mounting bracket.
(d) Install the two screws [9] and washers [10] to attach the clamps [8] to the mounting
bracket.
1) Tighten the screws [9] to 25 in-lb (2.8 N·m).
SUBTASK 47-42-01-765-001
(4) Use the intrinsically safe approved bonding meter, COM-1550, to measure the electrical
resistance between the altitude sensor [1] and the mounting bracket (SWPM 20-20-00).
(a) Make sure that the resistance between the altitude sensor [1] and the mounting bracket is
0.008 ohm (8 milliohms) or less (SWPM 20-20-00).
SUBTASK 47-42-01-390-001
(5) Apply a cap seal of P/S 890 Class B sealant, A50051, to the bonding jumper [7] terminal,
fasteners and bare conversion coated areas.
SUBTASK 47-42-01-430-001
(6) Connect the electrical connector [2].
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
47-42-01
Page 406
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ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details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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