Is there a reset tag on it?
Soldiers, on the whole, don't go that far into an engine. Maintenance procedures tell them to change the engine, when it has a problem. Commanders don't like down time. So when a problem is above their level of maintenance, they send the set to Direct Support Maintenance. DS maint normally doesn't want to go into an engine, because it's quicker to simply change it. About the only time I ever saw anyone go into an engine, was at RESET.
I talked to a CECOM guy who told me the springs were a problem early on, but were "corrected", what ever that means.
Ah yes. The famous left handed threads. I watched two Brits, (in a RESET facility) break one off. They worked real hard at it! That engine got swapped out too!