Procedure Manual AT 101 FAA Original Issue Date: September 19, 1989 APPROVED Revision: 8 Date: June 1, 1997 PROCEDURE; APPLICATION OF FABRIC WITH AIR TECH FABRIC ADHESIVE UA 55 PROCEDURE AT 101 – FA The Air-Tech fabric adhesive is a concentrated thermoplastic adhesive. The following procedures must be followed: 1. Except for surface tape application (see Step 6 below & page 5 herein) thin the UA 55 Rev. 1 adhesive concentrate with Air-Tech adhesive reducer (RA 4000 Rev. 3) in the ratio of 2 parts reducer to one part of UA 55 Rev. 1 by volume. The viscosity of thin “pancake” syrup is about right. 2. Metal surfaces, bare or coated, are suitable substrates for gluing fabric.
Metal surfaces requiring primer must have a two part epoxy primer – Air-Tech PE 1700 or PE 1730 applied. Prior to primer application surfaces must be cleaned and treated according to FAA AC 43.13 – 1A Chapter 6. 3. Wood surfaces to which fabric is to be attached must be sanded and cleaned (FAA 43.13 – 1A Para. 129) and coated with Air-Tech polyurethane spar varnish (M 9200). 4. Any surface to which fabric will be attached must be brush coated with two thinned coats of adhesive. Minimum overlap for fabric lapped joints is 4 inches on the leading edge and 2 inches elsewhere. 5. When applying surface tapes with the adhesive a thinner mixture is required (3 parts reducer RA 4000 Rev.
3 to 1 part UA 55 Rev. 1) See Procedure AT 101 – ST, page 5 herein. 6. After attaching fabric pieces, tapes or reinforcements always brush two thinned coats of adhesive (3 parts reducer RA 4000 Rev. 3 to 1 part UA 55 Rev. 1) on the glued attachment area. 7. On larger surfaces such as leading edges, “turtle decks”, etc. brush two thinned coats (3/1) of adhesive on the area after fabric gluing and shrinking is complete. 1. Do not apply adhesives below 40°F. 2. Allow 24 hours for cure to full strength. Limitations: Material Safety Data Sheets are available upon request.