Singapore Airlines' 777-200ERs were the first to enter service, with the first delivered on 5 May 1997. While Singapore Airlines lists some of its 777-200ER jets as 777-200 aircraft, all of the supposed -200 series aircraft were all built with enhancements usually exclusive to the -200ER, with the single modification being the Trent 892 engines derated to the -884 spec used on the standard -200 aircraft, reducing the MTOW and thus aircraft fees at the airport when categorized by maximum takeoff weight (MTOW).