Lockheed Martin said its C-5 Reliability Enhancement and Re-engining Program (RERP) flight test team completed developmental testing of all three C-5 RERP test aircraft. The testing included verification of performance and reliability enhancements to the propulsion system, utilities and subsystems, flight controls, airframe and avionics systems, Lockheed Martin said. With the flight tests complete, the team will now prepare to deliver the three test aircraft to the U.S. Air Force, in support of Operational Test and Evaluation, scheduled to begin in the third quarter of 2009. The C-5M Super Galaxy is the result of a two-phase modernization effort. The ongoing phase, the Avionics Modernization Program, provides a glass cockpit and a digital backbone to support the RERP modifications. Forty-three C-5 aircraft have completed the AMP modifications. RERP is the second phase, which adds new GE CF6-80C2 commercial engines and 70 other enhancements or replacements of major components and subsystems.