Well done to those who provided such a very good investigation report that highlights so many different issues (across such a very wide range of both Civil and Military aviation organisations) that contributed to this serious accident taking place.
It is extremely fortunate that no such Main Rotor Gearbox related failures have so far led to the loss of life on UK Griffins (or other worldwide similar Bell helicopters that have also previously suffered similar failures).
It was particularly worrying to read about the loss of some very important MRGB related component workshop defect findings, any associated defect rectification records and that there is not even any traceability regarding where that same critical part is now? Throughout my career I have been amazed at just how bad many ‘worldwide’ overhaul/repair organisations defect rectification records are and why some Airworthiness Authorities (and their approved organisations Airworthiness/Quality staff) still seem to allow that culture to continue? That needs to change for obvious reasons!