I am Retired. Â I retired from Chevron after 14 years, and then went to work for Union Pacific Railroad as a Switchman, Conductor, Engineer, and Rules Instructor.Â
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May 27, 1970, C-5A 70172 was destroyed during a ground fire after an Air Turbine Motor (ATM) started backwards and quickly overheated, setting the hydraulic system on fire and consuming the aircraft. Â This was at Palmdale, CA.
October 17, 1970, C-5A Ship #1, 668303 was destroyed during a ground fire at the Lockheed Aircraft plant at Dobbins AFB, Marietta, Georgia. The fire started during maintenance in one of the aircraft's 12 fuel cells. One worker was killed and another injured. This was the first C-5 aircraft produced.
September 27, 1974, C-5A 80227 crashed after over-running the runway at Clinton Sherman Municipal Airport during an emergency landing following a serious landing gear fire. The C-5 had taken-off from Altus AFB, Oklahoma.  However, during taxi out for take-off, one of the brakes was dragging and also developed a hydraulic leak causing the fire.  The flight crew was wanting to land at Clinton Sherman AFB, but became confused on approach and landed at the municipal airport instead.
April 4, 1975, C-5A 80218, crashed while attempting an emergency landing at Tan Son Nhut AB, RVN. Â It was carrying Orphans out of Vietnam during Operation BabyLift. Â Speculation as to the cause of the crash varies, however, Lockheed Company took full responsibility.
On 31 July 1983, C-5A 00446 crashed on landing at Shemya, AFB, Alaska. The C-5 approached below the glide slope, hit an embankment short of the runway and bounced back into the air before coming to rest on the runway. Â Time became an important factor. Â As 446 sat on the runway Winter was getting closer & closer. Â A decision was finally made, and 446 now became Phoenix II. Â It was repaired for a one time flight to Lockheed. Â
July 1985, C-5A 80216 landed gear up at Travis AFB, California. Â Crew negligent in using CRM.
August 29, 1990, C-5A 80228, Bravo 12,  crashed shortly after takeoff following an engine malfunction.  The aircraft took off from Ramstein AB, Germany.  One of the engines thrust reversers extended and the C-5 crew was not able to recover the aircraft.  There were only 4 survivors.
April 3, 2006, C-5B 840059 crashed following a cockpit indication that a thrust reverser was not locked. The C-5 landed approximately 2000 feet short of the runway. Â Sadly, this was a complete crew failure. Â They did not use their Cockpit Resourse Management Tools.