Helicopter Sikorsky CH-53C Serial 65-335 Register 70-1625 used by US Air Force USAF. Aircraft history and location By Al Henderson Aircraft History 70-1625 US Air Force 1975-11 A ETOUUSAF, first CH-53C second batch CH-53C type 601st TASS new delivered 601st TASS 1995-05-27 Sikorsky MH-53J conv to MH-53J 27may95 as MH-53J type 21st SOS at RAF Mildenhall 21st SOS 1999-07 B EGUN homebase 21st SOS 21st SOS Sikorsky MH-53M Pave Low IV conv to MH-53M 2003-11-23 C OAIX20th SOS w/o at Bagram, Afghanistan 20th SOS Send Updates Use APP to upload photo @ (optional) When Now? / / Send