"Two samples of avtur were sent Lemigas by P.N.Merpati Nusantara Airlines, Jakarta head office, with the referece letter of August 5, 1974, No. MNA/001/16/9/Adm- 2945. Sample number one was received on August 5, and sample number two on September 10. Both sample consist of besides avtur and Ca, 25 Ml water layers there below, also browness-black sludge-like material swimming at the inter face. The sludge-like material was suspected to be fungsi sp.,and Lemigas is requested to make the confirmation/identification. The case is registered in the Department of Refining and Chemistry under the number of 3.c.540 "