Although none of the US military's twin-jet C-9 Nightingale shorter-range medical evacuation transports has been found to have the horizontal stabilizer jackscrew damage suggested to have caused the crash of a related type of commercial jetliner (and subsequently found on 23 civilian-registered aircraft), there are other aeromedical challenges. Larger, four-jet C-141 transports, the primary means of flying US military patients to the United States from abroad, are to be phased out in the next 6 years. Of the original fleet of 285, just 151 remain.
Gunby P. How Will Future Patients Fly?. JAMA. 2000;283(13):1680. doi:10.1001/jama.283.13.1680-JMU00000-5-1