https://www.hqmc.marines.mil/Agencies/USMC-FOIA/FRR/
The link above is for the USMC report on the dual clutch hard engagement accident in California last year.
Probably not what caused this accident but they do discuss in this report Marine Corps specific safety data related to MV-22 operations. I don’t remember the exact numbers, but the report is worth a read as it does cover some emergency procedures as well as normal procedures for Osprey operations.
FltMech