Does the range of the Short 360 aircraft need to be modified.
It has a range listed here of 350 NM.
However, a quick internet search indicates more range, - Wikipedia 1,595 km (991 mi, 861 nm)
https://en.wikipedia.org/wiki/Short_360#cite_ref-Frawley_2003_7-3
flugzeuginfo says Range 1.056 km (656mi, 570 nm)
http://www.flugzeuginfo.net/acdata_php/acdata_360_en.php
A single value for the range doesn't tell us enough really. We'd need the chart for information about payload and range. Or values for range with maximum payload, range with maximum fuel / zero payload ("ferry range"), and optimally also a third point in between. For some aircraft types these are a bit tricky to find from the internet.
The general performance model for Short 360 is old v.1 so there is a good change some of the weight/range data has inaccuracies too.