Re-engining of the US Air Force's oldest Lockheed C-5 Galaxy strategic airlifters has been cancelled by the US Department of Defense after a steep increase in the project cost of the programme. The USAF's 62 C-5As will no longer be modernised under the reliability enhancement and re-engining programme (RERP), which replaces the TF39 engines with General Electric CF6-80C2s and upgrades other systems. Lockheed will still re-engine 47 newer C-5Bs and two C-5Cs operated for NASA. Including three that have already undergone avionics upgrades and re-engining to become C-5M test aircraft, this will give the USAF a total of 52 modernised...