Here's another "We don't need that!" story:
For about 20 years the RAF Puma's deployed to North Norway for really cold winter exercises and every year at least one Puma suffered an oil leak from a MRH Sleeve requiring the following:
Ground the Puma
Remove MRB and Sleeve Assy
Transport Sleeve Assy to Odiham for repair (Truck-Herc-Truck)
Give Odiham grief for not fixing the item before it arrives for repair
Strip Sleeve Assy (two hours)
Fix leaky seal (30mins)
Rebuild Sleeve (6-8 hours due to heat treatment of Bearings and Sleeve Assy's and allowing it all to cool again)
Calibrate Sleeve to Workshop wall (30 mins)
Transport the Sleeve back to Norway (Truck-Herc-Truck)
Refit Sleeve
Refit MRB
Ground Run(s)
Check Flight(s) - and off you go again.
In 1988 we (the workshop) got so frustrated with the lack of a mod to replace the seal that we contacted another operator of pumas in cold weather, Bristow, direct and found that they had cured the seal issue some 15 years earlier! We again made direct contact with Westland's to find they'd informed the Puma EA at that time but received only an acknowledgement in response....thus allowing 15+ years of needless and costly mission cancellations and repair runs.
Two of my buddies then put in a Good Idea and made some money out of their suggestion. In these later years, I can happily confirm that the same sort of RAF mismanagement still occurs...somewhere, if not everywhere.