flying through moderate ashes may require extra maintenance to the engine.
It's not just the maintenace it's also getting the parts. Things like turbine blades:
- Cannot be knocked up the local foundry/machine shop, they require specialized casting equipment for directional solidification/single crystal.
- The supply is tailored to 10k+ hours life
- The stock held is taiored to 10k+hours life
If the life is reduced to ~ 100hrs from a single exposure (as the Finnish results suggest) then one exposure + 1 week normal (no dust) short haul then AOG for years waiting for bits