Trigana Air Service (IL, Jakarta Halim) has added its first B737-400 to its fleet of six ATR42s, three ATR72s, three B737-200Advs, and four B737-300(F)s. According to Aerotransport, the machine is PK-YSF (msn 23869) which was formerly with Batavia Air (Jakarta Soekarno-Hatta). Founded in 1991, Trigana offers scheduled passenger and cargo services on an extensive domestic Indonesian route network.