What are the army accidents classes?
Class A accident. An Army accident in which the resulting total
cost of property damage is $1,000,000 or more;
an Army aircraft or missile is destroyed, missing, or abandoned;
or an injury and/or occupational illness results in a
fatality or permanent total disability. Note that unmanned
aircraft systems (UAS) accidents are classified based on the cost
to repair or replace the UAS. A destroyed, missing, or abandoned
UAS will not constitute a Class A accident unless replacement or
repair cost exceeds $1,000,000 or more.
Source: safety.army.mil