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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. (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 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. (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.] Page 3-8 Par 3-4PDF Image | AFS-640
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