TM 9-2320-386-24-1-2 0351 00 FIBERGLASS HOOD REPAIR (BUILT AFTER SERIAL NO. 504923) (Contd) 0351 00-4 2. Repairing cracks or splits. .WARNING. When sanding fiberglass, personal protective equipment (respirator, goggles/shield, gloves, coveralls, etc.) must be used. Failure to do this may result in injury. (a) Using sandpaper, remove dirt and paint 3-4 in. (8-10 cm) around area of crack. (b) Rough-sand surface, underside of surface if possible, to which mat will be added. Surface must be dry. (c) Bevel edges of crack in a broad V. (d) Cut patch from fiberglass mat and apply to underside of hood (1) with resin mixture. Extend patch beyond break about 2 in. (5 cm) and press firmly into place. Saturate patch with additional layer of resin and allow 1-3 hours to cure. (e) At the same time, cover top of hood (1) at break with resin, allowing 1-3 hours to cure. (f) For areas with hardware installation, lightly sand first patch and add another patch layer, repeating substeps d and e. (g) Finish-sand exposed surface. (h) Prime and paint (refer to TB 43-0209). 3. Repairing hood insulation retaining pins. (a) Remove damaged retaining pin (2). Bevel edges of hood (1) approximately 20 degrees at outside edge of retaining pin (2) location. (b) Using sandpaper, remove dirt and paint in area of retaining pin (2) extending away 3-4 in. (8-10 cm). (c) Rough-sand underside of hood (1) to which patch will be added. (d) Cut a piece of fiberglass patch that will extend past edge of retaining pin (2) location about 2 in. (5 cm). (e) Coat retaining pin (2) location and saturate patch with resin mixture. (f) When tacky, apply fiberglass patch to retaining pin (2) and hood (1). Press patch against retaining pin (2) and hood (1). (g) Allow 1-3 hours to cure. Additional coats of resin may be added if necessary for appearance purposes. Sand lightly between coats. (h) Finish-sand exposed surface. (i) Prime and paint (refer to TB 43-0209). 4. Install composite hood (WP 0197 00).