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Advisory Circular AC135-14B, Paragraph 1-6, subparagraph dd: (2015) 

Medical Crewmembers. Also referred to as medical flight personnel, as opposed to flightcrew members. A medical crewmember (medical personnel) is an individual with medical training, carried aboard a HAA during flights or flight segments. Crewmembers typically include: flight nurses, paramedics, respiratory specialists, neonatal specialist and other medically-trained specialists. (Refer to § 135.601(b)(2).)

FAA OPSPEC A002, FAA Notice N8900.216, Appendix A, Terms and Definitions:

Medical Crewmember:  A person with medical training who is assigned to provide medical care and other crewmember duties related to the aviation operation during flight.

8900.1,Vol.4,Ch7,Sec4_SAS, Night Vision Imaging Systems, Safety Assurance System (7/8/19)

4-1128 CERTIFICATION PROCESS.

B. 4), d), 1.

Modules within the airman-specific segment include, appropriate to the
crewmember position (e.g., pilot or medical crewmember):
•Introduction to NVGs,
•Limitations/emergency procedures,
•NVG aeromedical consideration/aviation physiology (including visual
illusions),

FAA Order IR 3900.74, Aircraft Certification Service (AIR) Bloodborne Pathogens (BBP) Program Occupational Safety and Health (OSH) (2018)

Chapter 3, Chapter 3. Bloodborne Pathogens Program Requirements:

5.B.(7) ... Additionally, items such as night vision goggles (NVG), oxygen bottles, or stretchers which may be subject to inspection by AIR employees, could be touched by a gloved medical crewmember during the transport of a patient with an infectious disease and inadvertently never get decontaminated. ... Check with the pilot in command (PIC) or medical crewmember for a safety briefing before entering the air ambulance site. ...