FAA Advisory Circular 43.13-1B
Acceptable Methods, Techniques, and Practices
Aircraft Inspection and Repair
AC 43.13-1B | 3. Fiberglass and Plastics | 1. Repair of Light Load Laminate Structures | 3-4. Sample Bagging and Curing Process
AC 43.13-1B
9/8/98
used over the heat blanket. This will insulate
and prevent damage to the nylon bagging film.
Ensure that the breather plies are in contact
with the bleeder plies so that an air passage
exists.
(i) Place a bead of sealing tape
against the parent material around the edge of
the breather plies. Seal the thermocouple
wires to prevent vacuum leakage.
NOTE: Two layers of sealing tape
may be required in order to provide a
good seal.
other will be connected to the vacuum source.
The vacuum probe must sit on the breather
plies, but must not touch the patch or adhesive.
NOTE: Place the vacuum gauge on
the opposite side of the vacuum port,
where applicable. Do not place vac-
uum probes near repair area.
(l) Connect the vacuum source and
smooth the bag by hand pressure as the air is
removed. Check for leaks and reseal as neces
sary. A minimum vacuum of 22 inches of
mercury is required.
(j) Cover with a suitable vacuum
bag, smoothed to minimize wrinkles. Press
the bag firmly onto the sealing tape to obtain
an air-tight seal. Place pleats in vacuum bag to
allow the bag material to stretch.
(k) Install two vacuum probes or
sniffers through openings cut in the bag. One
will be used for the vacuum gauge and the
(m) Place insulating material over
the vacuum bag to prevent heat loss.
(n) Apply power to the heat blanket
and control its temperature as specified for the
material being cured.
(o) Observe cure time requirements
established by the product manufacturer.
3-5.3-9. [RESERVED.]
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