With Trigana Air since August 2014. See picture ID 841657 for the history of this airframe. Trigana Air dominates the hauling of airfreight from Sentani-Jayapura to the city of Wamena located in the Baliem Valley at an altitude of approx 5'500 ft / 1600 meters. In August of 2025, Trigana operated three B737 freighters to supply Wamena, the biggest city in the world only accessible by air and therefore completely depending on an air bridge. Each aircraft does 3 to 4 daily runs, each time carrying a load of some 15 metric tons.

PK-YSG joined the fleet of Trigana Air in August 2014, only some 3 month before this picture was taken. The 1988 built passenger airframe was operated by airlines like Piedmont (N357P & N585US), USAir and US Airways (both as N585US), before it got converted into a freighter for TNT Airways in August 2006 (registered OO-TNH). It briefly flew for Swiftair as EC-LTO from April 2012 before being sold to Trigana two years later. Still current at the time of upload, wearing the now more colorful latest Trigana livery, see next picture.