http://www.defenseindustrydaily.com/swiss-kerfuffle-over-chads-use-of-pilatus-aircraft-04655/I have long heard of the Swiss law prohibiting the usage of swiss-built aircraft, in this case the PC-7/PC-9 series of trainers in combat roles for export customers. Chad appears to be the latest "unknowing customer" which faces a lawsuit from the Swiss after the use of PC-7/PC-9 aircraft for light attack missions against Sudan.
With the RSAF ordering 19 PC-21 aircraft as its basic trainer, the potential usage for combat would be hard to materialize. The RSAF undoubtedly has more capable combat aircraft in the form of the F-15SG and F-16C/D but quantity is also a quality in itself, where the PC-21s could be used for light attack/COIN duties and sparing the former for more important missions.
Do you think we would still go ahead and tweak the aircraft for munitions carriage, despite the existance of such restrictions?
After all the S211 and the retired SF260s are also capable of light attack duties.