Groaner
Don't forget, Boeing sell parts and make money from them. So their recommendations in this area should be taken with a pinch of salt. Economics dictates taking a bit of downtime or copping loan charges rather than having lots of little-used, expensive spares sitting around not doing much.
?? Boeing actually sell aircraft and wont continue to sell a shedload of them if they don't work when they are supposed to or they get trashed by the operator.
An operator in his right mind will have or have access to something like they, Boeing, suggest at the peril of their continued existence.
Sure the aircraft will survive on its reputation for a very good while, but sooner than later you are going to have to replace something somewhere and usually out the back of Bourke.
If I was the regulator I would be scruting mightily with an very intense scrute. (apologies to Messrs Milligan and Bentine)
The scary bit is, that when you
are bumping along the bottom of an "economic" spares inventory, the risk that 'someone' out there will sign off on or turn a blind eye to "'till it gets back to base so they can rat the part up from somewhere" on a dodgy part out of loyalty 'for the company" goes assymptotic and you will get set up for a expense that makes Boeing's $5,000,000 look like lunch money.
Chances are, if you cant afford a sensible spares package and need to run the aircraft on its reputation to make money, then you probably didn't have a business in the first place.
Consuming capital or parts amounts to the same thing at the end of the day.