The Delta model has also become prohibitively expensive to fly and operate, he added. Even the most recent upgrades to the AH-64E — the most advanced Apache helicopter — "are also on the cusp ...

The most recent and advanced Apache variant to come online is the AH-64E. Boeing’s “E” model of the Apache went under contract with the U.S. Army at the end of 2021.

This contract is separate from Indian Air Force's 2015 multi-billion dollar contract signed with Boeing for 22 Apache E-Model helicopters, which were fulfilled in 2020. The Defence Ministry ...