The squadron was established in March, 1950 at Mauripur with Sqn. Ldr. A. K. S. Ahmed as Officer Commanding. This was the first heavy bomber squadron of the Royal Pakistan Air Force with eight Halifax aircraft. It put up six aircraft for Pakistan Day Fly-Past on 14th August, 1950 - a great achievement in view of the fact that the squadron was very much under established and remained in tight situation for spare parts and ancillary test equipment. The squadron was reduced to number-plate basis on 18th August, 1950, and the six available aircraft were allotted away to RPAF Station Mauripur reserve for long-term storage. Halifax storage was converted to a flying unit at the end of July, 1951 when the Indian troops concentrated on our borders. The squadron was again formed, and started functioning on 15th August, 1951. In September, 1953 the scope of the unit was enlarged; it was converted to No. 12 Composite Squadron with Sqn. Ldr. M. A. Dogar as the Officer Commanding, comprising the Governor General's Communication Flight, Air Headquarters Communication Flight, Target Towing Flight and Heavy Bomber Flight. A large variety of aircraft have been used with their induction and phasing out as follows:

Halifax (1948-1954)
Tempest (1947-1956)
Dakota (1948-1960)
Viking (1948-1960)
Dove (1949-1961)
Fury (1949-1963)
Bristol Freighter (1948-1966)
Viscount (1956-1967)
SA-16 (1958-1968)
Auster (1947-1961)
Harvard (1947-1976)

Some of these aircraft were released by the squadron before their actual phasing out from the PAF in accordance with its changing role. On 9th July, 1960, the squadron moved from Mauripur to Chaklala. The role of the squadron has been to provide aircraft for communication of V.I.Ps., and to conduct training and categorization of squadron aircrew. The aircraft currently in use is F-27 (Fokker), which was inducted in 1965, and Falcon (Jet Communication aeroplane) inducted in 1973.