Carbon Fiber Fabric Repair Prepreg, 125°C (250°F) Vacuum Curing Part 1 - General Requirements
AMS3970/1
AMS 3970/1 gives information about the technical requirements and qualification procedure for carbon fiber fabric epoxy prepreg used for repair of carbon fiber reinforced epoxy structures. The prepreg system may include a film adhesive to be applied in a co-curing process with the prepreg for joint and sandwich bonding. The need for a film adhesive shall be established during screening tests.
Rationale: Main Updates are:
-Harmonization of requirements with AMS6885
- Storage life extension procedures
- Clarified shipping and storage conditions
- Additional cure cycles for M20 /40%/G904 to support thick repairs and higher in-service temperatures
- Re-qualifying the non-structural M20 glass prepreg due to changes in the manufacture process by Hexcel and due to introduction of a new resin content
