1. FAA/NASA Workshop on Key Characteristics for Composite Material Control - Chicago, IL M17 M&P NWG DRR August 6 - 8, 20021/12 Carbon Tape Material Specification 2.4 (11) - Who surveys and approves PCD, and who is authorized to change it? 2.4 (12) - “If equivalency is not demonstrated, the prepreg production process change will not be allowed.” Engineering Judgment? Application? 2.4 - How does potential user find work in progress?

2. FAA/NASA Workshop on Key Characteristics for Composite Material Control - Chicago, IL M17 M&P NWG DRR August 6 - 8, 20022/12 Carbon Tape Material Specification 4.0 (17) - SACMA specification mechanism for revision? 5.0 (17) - Same quality criteria for all users/application? 6.0 (18) - PCD must be developed, available, and referenced by revision 6.1 (18) - Out-time by shelf life could be tied to N batch reviews.

3. FAA/NASA Workshop on Key Characteristics for Composite Material Control - Chicago, IL M17 M&P NWG DRR August 6 - 8, 20023/12 Carbon Tape Material Specification Table 1 (20) - Standard exposure conditions for moisture conditioning? Thermal induced microcracking - spiking? 6.2.1 (21) - Experiment assumes level of control which makes tighter limits possible 6.2.2 (22) - Purchasing document other than mat’l spec for roll characteristics? 6.3.1 (34) - Baseline cure - oven or AC? NDT?

4. FAA/NASA Workshop on Key Characteristics for Composite Material Control - Chicago, IL M17 M&P NWG DRR August 6 - 8, 20024/12 Carbon Tape Material Specification Table 5 (26) - Rec’d thickness for crossplied laminates rounded to 0.100” (balanced/sym.) 6.3.3 (27) - Exposure temps for fluids? Table 6b (29) - Cocure vs. sec. bonded skins Table 7 (30) - Runout # cycles? 9.1 (36) - Supplier demonstrates testing, records, calibration, SPC to whom? 9.4.1 (37) - Purchaser notified of retesting

5. FAA/NASA Workshop on Key Characteristics for Composite Material Control - Chicago, IL M17 M&P NWG DRR August 6 - 8, 20025/12 Carbon Tape Material Specification Appendix A - Future Needs - Improved methods for ID of sources of variability in composite materials (nested experimental designs)

6. FAA/NASA Workshop on Key Characteristics for Composite Material Control - Chicago, IL M17 M&P NWG DRR August 6 - 8, 20026/12 Larger Scope of Composite Materials 250 & 350°F Cure Epoxy Prepregs –C - tape(s), PW, 5H, 8H –G - tape(s), 120, 7781 –A - 285 Other composites –Phenolic –Polyester –Wet Layups - Dry Fabrics Adhesives –250 & 350°F Film Adhesives –Paste Adhesives –Foaming Adhesive –Potting Material Core –H/C - cell size(s), density(s) –Foam - Density(s), Temps Surfacing film

7. FAA/NASA Workshop on Key Characteristics for Composite Material Control - Chicago, IL M17 M&P NWG DRR August 6 - 8, 20027/12 Carbon Tape Process Specification 1.2 (10) - “safe’ in both docs, context depends on application Material document says min. 3 batches (10), process document says 3 to 5 (12) 1.3 (12) - Fabricator qual tests consist of? Tying in qualification with other cure cycles and fabrication methods?

8. FAA/NASA Workshop on Key Characteristics for Composite Material Control - Chicago, IL M17 M&P NWG DRR August 6 - 8, 20028/12 Material vs. Process Specifications Most material specifications reference testing or other industry documents Most process spec referenced documents are internal 2nd and 3rd tier process specs Scope of all fabrication processes seems ambitious Suggest example spec should be for panel processing

9. FAA/NASA Workshop on Key Characteristics for Composite Material Control - Chicago, IL M17 M&P NWG DRR August 6 - 8, 20029/12 Composite Rotor Blade EPB (25) Material Specs G Tapes/Fabrics C Tapes/Fabric Film Adhesive Honeycomb Foaming Adh. Paste Adhesive Sealants Surfacing Film Consumables Process Specs Cont’d Film Bond (29) Clean Room (11) Trim/Drill/Mach (44) EPB Finish Contour Process Specs Comp Fab - Prim (70+) H/C Bond Prep (24+) Composite Inspect (16) Inspect Criteria (26+) Ultrasonic (23+) Radiographic (23) Bondline (12) Paste Bond (21) Serialization Degreasing

10. FAA/NASA Workshop on Key Characteristics for Composite Material Control - Chicago, IL M17 M&P NWG DRR August 6 - 8, 200210/12 Composite Fabrication Specification Closed Cell Core Detail Fab (20) H/C Core Detail Fab (26) Shelf Life, Out-time (22) Secondary Structure (52) Autoclave/Oven/Press Thermal Survey (13) Part ID

11. FAA/NASA Workshop on Key Characteristics for Composite Material Control - Chicago, IL M17 M&P NWG DRR August 6 - 8, 200211/12 Composite Fabrication Specification Cure Cycle Variations Material - 250 and 350°F cure Tooling - Composite, matched metal, internally pressurized Process - Hand layup, resin injection Structure - Solid laminate, sandwich (Foam/HC, precured/cobonded skins) Cure Vessel - Autoclave, oven, press, trapped rubber

12. FAA/NASA Workshop on Key Characteristics for Composite Material Control - Chicago, IL M17 M&P NWG DRR August 6 - 8, 200212/12 Film Adhesive Bonding Composite surface preparation Bond primer application (20) Metal Surface Preparations –Al Anodize (23) –Titanium (21+) –AM355 Steel (37) –Ni/CRES (22) –Ferrous (18)