ILF 101, 151, 156-199, 301, 304, 308, 310, 314, 315, 317-319, 323, 331-399, 401, 402, 405, 406, 409, 410, 412,
416, 424, 425, 427-429, 451, 452, 491-499, 501-504, 507-510, 512-516, 518-520, 523-528, 530-533, 535-537, 541,
542, 552-557, 559-564, 567-569, 571-577, 581, 583, 585, 588-590, 592-599, 601-603, 606, 607, 610-615, 620,
625-627, 671, 672, 691-699, 703, 707-710, 803-813, 821, 822, 831-836, 838, 841, 842, 851, 852, 854-858, 861-863,
871-874, 947, 948, 972, 973, 980-999; ILF 500, 686, 837, 968-971 POST SB 737-53-1285 (Continued)
1) Make sure that there are no protective backing on the panel side of the tape before
installation.
NOTE: Use tape widths that will give 1/16 in. (1.6 mm) - 1/8 in. (3.2 mm) of excess
on each side of the mop sills and crease beams. Excesses more than 1/8
in. (3.2 mm) are permitted.
(e) Apply the GUA1057-1, GUA1059-1, GUA1057-144 tape, G02424, to the floor panels.
ILF ALL
SUBTASK 53-21-00-400-002
(6) Before you install floor panels in the dry area, examine the tape, G50019, or 3M 4508 tape,
G51561.
NOTE: More layers of tape, G50019, can be used below the low panels, if necessary, to meet
flushness and clearance tolerances. Total thickness of compressed tape, G50019, and
shims can not be more than 0.07 in. (1.78 mm).
NOTE: The dry area is between section 41 and section 47, and more than 20 in. (51 cm) from
a galley, lavatory or entry/service door.
NOTE: For the three section 44 aisle panels (STA 537 to STA 727B) 3M 4508 tape, G51561,
may be used instead of tape, G50019.
SUBTASK 53-21-00-350-001
(7) If a replacement floor panel is to be installed:
(a) Make sure that the new floor panel has the same contour and dimensions as the
removed floor panel.
SUBTASK 53-21-00-420-004
(8) Align the floor panel with the holes in the floor support structure.
SUBTASK 53-21-00-420-002
(9) Install the screws with wet compound, C00528, until they are smooth with the floor panel.
NOTE: Do not tighten the screws.
SUBTASK 53-21-00-820-001
(10) Do these steps to torque the floor panel screws:
(a) Tighten the screws on the panels with the two-piece insert to 24 in-lb (2.7 N·m) - 26 in-lb
(3 N·m).
NOTE: Do a check of the torque before the installation of the floor covering.
(b) Tighten the screws on the panels with the one-piece insert to 35 in-lb (4.0 N·m).
NOTE: Let the panel dish at the fastener -0.005 in. (-0.127 mm) to 0.030 in. (0.762 mm).
SUBTASK 53-21-00-220-001
(11) Examine the floor panel clearances.
SUBTASK 53-21-00-390-005
(12) Apply one layer of Scotch Flatback Masking Tape 250, G00270, to the edge of the joints that
are adjacent to and along the full length of the clearance at the edges of the panels.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
53-21-00
Page 413
D633A101-ILF Oct 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF ALL
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