US Army bombers attacked the Japanese seaplane base at Deboyne Islands according to the U.S. Joint Intelligence Committee Daily summary dated 13 May 1942

An item reported that US Army bombers on 10 May again attacked the Japanese seaplane base at Deboyne Islands (Louisade Archipelago=Papua New Guinea). There were 2 hits on a storehouse, 2 hits or near misses on a 8.000 tons tanker and furthermore near misses on planes.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 154 dated 13 May 1942.