Helicopter Mil Mi-171Sh Serial 171S00604137459U Register EP-685 used by Ejercito del Peru (Peruvian Army). Aircraft history and location Aircraft History EP-685 Ejercito del Peru c/n 171S 00 604 13 7459U Ejercito d/d Nov15 BAT811 2021-04-17w/o during antidrug patrol crashed into rio Urubamba near Urbano Maria, Megantoni. 5 of 12 fatalities Send Updates Use APP to upload photo @ (optional) When Now? / / Send