3) Cut a patch of 3M 8663 tape, G02423 or 3M 8663DL tape, G02500 or moisture
barrier tape, G51340 (optional) to either cover flush mounts or to extend into the
radius of protruding mounts.
a) Extend the tape to overlap the previous installed tape by a minimum of 1 in.
(25 mm).
b) Remove the backing from the non-adhesive side of the tape.
c) Apply fillet sealant, A00247 to the edges of any protruding mounts.
(9) Do these steps to seal the door gutters:
(a) Cut a patch of 3M 8663 tape, G02423 or 3M 8663DL tape, G02500 or moisture barrier
tape, G51340 (optional) to fit over the gutter and girt bar fitting for forward entry door.
(b) Extend the tape a minimum of 1 in. (25 mm) onto the existing waterseal tape.
(c) Trim the tape at the edge of the gutter.
(d) The forward and aft ends of the patch must extend a minimum of 2 in. (51 mm) past the
door edge frames.
(e) Apply sealant, A00247 to all waterseal tape edges where it cut back from the edge of the
gutter.
(f) Apply a bead of sealant, A00247 to the existing sealant at the edge of the gutter and
along the side of body crease beam chord.
(g) Remove the backing from the adhesive side of the tape and push the tape down firmly to
smooth out the sealant bead.
(h) Remove the backing from the non-adhesive side of the tape.
(10) Do these steps to seal the floor panel edges at side of body crease beam:
(a) Trim the 3M 8663 tape, G02423 or moisture barrier tape, G51340 (optional) to the edge
of the floor panels at the side of body.
1) Apply a bead of sealant, A00247 to the existing sealant at the side of body crease
beam and fair it smooth.
2) Apply sealant, A00247 to the edge of door gutter patch.
(b) Apply the 3M 8663DL tape, G02500 or moisture barrier tape, G51340 (optional) on the
sealant at the side of body to extend a minimum of 1 in. (25 mm) onto the existing
waterseal tape and above the top edge of the side of body crease beam chord.
1) Extend the tape to overlap onto the door gutter patch a minimum of 1 in. (25 mm).
2) Push the seam tape until it touch and stick to the faired sealant.
3) Trim the seam tape to the top edge of the side of body crease beam chord.
(11) Do these steps to seal the floor panel edges at side of body crease beam: (Alternative method)
(a) Apply a bead of sealant, A00247 to the existing sealant at the side of body crease beam
and fair it smooth.
(b) Apply 3M 8663 tape, G02423 or moisture barrier tape, G51340 (optional) on the sealant
at the side of body to extend above the top edge of the side of body crease beam chord.
(c) Push the waterseal tape until it touch and stick to the faired sealant.
(d) Trim the waterseal tape to the top edge of the side of body crease beam chord.
(12) Do these steps to seal the floor panel edges adjacent to bulkheads:
(a) Trim the 3M 8663 tape, G02423 or moisture barrier tape, G51340 (optional) to the edge
of the floor panels or the bulkhead base at the flight deck partition.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
53-21-00
Page 806
D633A101-ILF Feb 15/2018
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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