DAL Pilot here who had the procedure in 2011. It’s called “maxillomandibular advancement. They cut the upper and lower jaw and pull them forward - in my case, lower jaw advanced 3/8”, upper about 1/4”. Had the procedure initially denied by UHC because the surgeon (Dr. Waite at UA, Birmingham; fantastic surgery team!) also wanted to cut and advance my chin a few millimeters. This is apparently a cosmetic procedure and UHC denied the entire surgery. I’d been suffering from severe obstructive sleep apnea my entire life and didn’t know it. Really started to feel the effects in my mid-40s. Just happened to marry a pediatrician at 46 who got me to the sleep doc. 18 months of CPAP (frequently recurring sinus infections, the hassle of keeping the FAA informed/special medical certification, etc) with the thing maxed out (try sleeping with the O2 mask on emergency) and I gave in to the surgery. This was not just to save the career; this was life saving surgery. And UHC denied it. Took three months and several letters from my sleep dr and the surgeon to get it approved. PM me if anyone wants to know about recovery, short and long term. In short, it worked. No more sleep apnea, no special medical. But, the recovery was challenging.