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This table summarizes data for 23 of the 24 shuttle flights that preceded the Challenger disaster.

Temperature Range ('F) At Least One O-Ring Failure No O-Ring Failures 51-55 56-60 61-65 66-70 71-75 76-80 81-85Flight number Date Temperature('F) O-Ring Failures D4/12/81 66 2 11/12/81 70 3 03/22/82 69 0 4 06/27/82 80 missing data 5 11/11/82 68 0 6 04/04/83 67 7 06/18/83 72 0 8 08/30/83 73 9 11/28/83 70 10 02/03/84 57 11 04/06/84 63 12 08/30/84 70 13 10/05/84 78 14 11/08/84 67 15 01/24/85 53 16 04/12/85 67 17 04/29/85 75 18 06/17/85 70 19 07/29/85 81 20 08/27/85 76 21 10/03/85 79 22 10/30/85 75 23 11/26/85 76 24 01/12/86 58 are to search