The Sikorsky S-61L first flew on 2 November 1961, and was 4ft 3in (1.27m) longer than the HSS-2 in order to carry a substantial payload of freight or passengers. Initial production S-61Ls were powered by two 1350shp (1005kW) GE CT58-140 turboshafts, the civil version of the military T58. The S-61L features modified landing gear struts without float stabilisers. Mitsubishi Heavy Insudtries received a license to produce the S-61L for the Asian market in 1961. 
List of Operators of Mitsubishi S-61L | |
| From | Organisation with model S-61L | |||||
| Construction Numbers on database of S-61L | ||||||
| ||||||
Construction Numbers | Help Us | |
| C/N | Year | History | ||
| M61-001 | 1962 |  JA9506 | ||
M61-003  | 1963 |   JA9507,N317Y,G-BEID | ||