. allow a medical examiner and the professional pilot to make their assessments. For example, in a failure of a limb case, it is perfectly possible to fly a modern fixed wing two crew operation with three hands.
You're happy to have a comercial plane's control surfaces managed by a mechanical device with critical fastener technology and materials science issues that has been deemed airworthy by a medical doctor and a pilot?
...with three hands ? Fly it yes, landing ? In this case, and in most future cases involving landings, only one hand was available for the landing. This could have been real ugly. It just seems like a risk management issue. The risk is fairly low (1 in 4 pilots) but the consequences are enormous, for such an easy solution of using approved hardware, and not Velcro and clothespins, or whatever the doctor feels like using. The doctor/intern building up the prosthetic probably has no idea that the lives of the passengers and crew aboard a plane may rest on the integtity of that screw, or bolt or pin. They likely assume the worse case to be the person falls or drops a cup of coffee.