Rare flown section of the Space Shuttle Discovery main propulsion engine aft ring blanket from mission STS-91. The reinforced thermal blanket approximately measures 166″ long and 12″ wide, and is stamped with part numbers: "V078-852626-019, MFG Date 3-94, S/N 25167-022, MFR 25167 Hi-Temp Insulation, Inc." Includes the original disposal bag and orange service tag: "Scrap ENG#1 R/H, V070.852626.019, OCN 25167-022, V30-15381+AFT-3-21-6727." In very good condition, with expected wear from use. Accompanied by three images of an aft ring blanket at the base of a propulsion engine. This particular blanket—one of three for each aft ring—flew as part of the STS-91 mission from June 2-12, 1997, a span of nearly 10 days that saw the spacecraft cover over 3,800,000 miles and orbit the Earth an astounding 155 times. A decidedly uncommon blanket that has never been previously offered in auction. Flown status presumed by aerospace memorabilia specialist Ken Havekotte. From the collection of aerospace memorabilia specialist Ken Havekotte.