RAF Design Guide: RAF-DG-00-001
Revision/Date: Rev.0/October 20, 2000
Subject: Non-metallic materials usage aboard NSF/NCAR aircraft
This memo is intended to give guidance and direction to experimenters designing research systems for flight aboard NSF/NCAR aircraft. Commercial electronic components need not comply with this memo. Additionally, small parts (such as knobs, handles, rollers, fasteners, clips, grommets, rub strips, pulleys, and small electrical parts) that would not contribute significantly to the propagation of a fire are exempted per Title 14, Code of Federal Regulations, Part 25, Appendix F, Part 1(a)(1)(v). Unique electronic components, wiring and cabling external to individual electronic boxes, and plumbing between different pieces of research equipment are expected to comply with this memo.
Materials that are flammable, produce smoke, or emit toxic fumes when exposed to a combustible or high-temperature environment should not be used in research equipment assemblies. The following non-metallic materials are acceptable for cable and wiring insulation and for supply and exhaust line plumbing:
The following materials are not acceptable for use in research systems to be carried aboard NSF/NCAR aircraft:
Experimenters are responsible for reviewing their drawings and parts lists to ensure non-acceptable materials are not specified for use in their system design. Non-metallic materials not listed in this memo must have data substantiating the acceptable use of the material aboard aircraft. If no such data exist, the experimenter will be required to demonstrate compliance with Title 14, Code of Federal Regulations, Part 25.853(a). One method of showing compliance for materials in compartments occupied by crew and for electrical system components is detailed in Title 14, Code of Federal Regulations, Part 25, Appendix F, Part 1(a)(1)(v) and Title 14, Code of Federal Regulations, Part 25, Appendix F, Part 1(a)(3) respectively. NCAR RAF will supply copies of these applicable sections upon request. Alternate methods of showing compliance must be negotiated with NCAR RAF Engineering, Operations, and Safety. The experimenter should allow ample time for this process prior to anticipated participation in research programs.
NCAR RAF personnel will inspect experimenter packages prior to installation on the aircraft. Experimenters should be able to provide certification for materials used in their equipment assembly. Material certifications should be requested from the supplier when material is ordered. Failure to provide acceptable information or data could result in equipment rework prior to obtaining approval for installation aboard the aircraft.
Experimenters are also encouraged to familiarize themselves wit RAF Bulletin No. 13: Design, Fabrication, and Approval of User-Supplied Equipment for NSF/NCAR Aircraft.
Further questions or clarifications regarding this memo can be addressed to the NCAR RAF Aviation Safety Officer.