List of Operators of Boeing-Vertol YHC-1B / YCH-47A From Organisation with model YHC-1B / YCH-47A 1960 US Army Aviation CH-47 Chinook 744 1960/92 Construction Numbers on database of YHC-1B / YCH-47A 6yhc-1b Construction Numbers Help Us C/NYearHistory b-001 1961 59-04982 b-002 1961 59-04983,N97645 b-003 1961 59-04984 b-004 1961 59-04985 b-005 1962 59-04986 b-006 1962 6 C/N.