The FMA was a very popular class of engine in her time, and was used for mixed traffic operations on the erstwhile Southern Mahratta Railway (later merged with the Madras Railway to become Madras and Southern Mahratta Railway).
Initially built as class FM, the engine was re-built with enhanced coal capacity and then re-classed FMA. The FMs themselves are considered an improvement over a still earlier class, the F class. One more FMA is preserved in the Visweswaraya Industrial Museum in Bangalore.