Windscreens
The Aussie MRH90 has been going through lots of windscreens. NHI (with AW in there somewhere) say it is probably FOD related - the composite airframe transmits much more stress to the windscreen, then any small chip or thermal imbalance can set up a crack mechanism. Might be the same for 139. NHI fix is to mount windscreen with more flexible "glue", have slightly larger locating holes, and fit a clear film on the outside. The film has been trialled and works really well.