1) Apply a bead of sealant, A00247 to the existing sealant or bulkhead base at the
flight deck partition and fair it smooth.
(b) Apply 3M 8663DL tape, G02500 or moisture barrier tape, G51340 (optional) on the
sealant at the flight deck partition to extend a minimum of 1 in. (25 mm) onto the existing
waterseal tape and wrap up the flight deck partition a minimum of 2 in. (51 mm).
1) Push the seam tape until it touch and stick to the faired sealant.
(13) Do these steps to seal the floor panel edges adjacent to flight deck transition:
(a) Trim the 3M 8663 tape, G02423 or moisture barrier tape, G51340 (optional) to the edge
of the floor panels adjacent to the flight deck.
(b) Apply 3M 8663DL tape, G02500 or moisture barrier tape, G51340 (optional) on the edge
of the waterseal tape extending over the lip and onto the vertical surface adjacent to the
flight deck.
SUBTASK 53-21-00-300-001
(14) Do these steps to repair cuts or air bubbles trapped under moisture barrier tape:
NOTE: Any air bubble must be less than 0.5 in. (12.7 mm) square inches in total area. In the
walkway area, bubble must be less than 0.05 in. (1.27 mm) in height and less than
0.1 in. (2.5 mm) in height elsewhere.
NOTE: Air bubbles greater than 0.1 in. (2.5 mm) square inches in area must be limited in
number to 10 or less in any 1 ft (305 mm) diameter area.
(a) To repair the air bubble, use a sharp blade to cut the tape over the bubble and squeeze
the air out. Be careful not to damage the underlying floor panel or structure.
(b) Apply a small bead of sealant, A00247 on the cut.
(c) Apply new tape and push down firmly to smooth out the sealant bead.
(d) Make sure the repair tape overlap the cut by a minimum of 2 in. (51 mm).
END OF TASK
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
53-21-00
Page 807
D633A101-ILF Feb 15/2018
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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