First of the ASENA turned back home. KC-135R are upgraded to Block 45 (Pacer CRAG 45.1) in order to keep them in service for next 15 years.
-The Block 45 modification upgrades or replaces 63 items including analogue instruments that are considered high-maintenance
-the aircraft has received new liquid crystal displays, radio altimeter, autopilot, digital flight director and other computer module updates, at least These are for USAF but safe to assume that ours should be the same since it is the same upgrade.
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