Space Shuttle Abort History
Source:
| Date | Orbiter | Mission | Type of Abort | Time of Abort | Description |
|---|---|---|---|---|---|
| 1984-06-26 | Discovery | STS-41-D | RSLS | T-4 seconds | Sluggish valve detected in Space shuttle main engine (SSME) #3. Discovery rolled back to VAB for engine replacement. |
| 1985-07-12 | Challenger | STS-51-F | RSLS | T-3 seconds | Coolant valve problem with SSME #2. Valve was replaced on launch pad. |
| 1985-07-29 | Challenger | STS-51-F | ATO | T+5 minutes, 45 seconds | Sensor problem shutdown SSME #1. Mission continued in lower than planned orbit. |
| 1993-03-22 | Columbia | STS-55 | RSLS | T-3 seconds | Problem with purge pressure readings in the oxidizer preburner on SSME #2. All engines replaced on pad. |
| 1993-08-12 | Discovery | STS-51 | RSLS | T-3 seconds | Sensor that monitors flow of hydrogen fuel in SSME #2 failed. All engines replaced on launch pad. |
| 1994-08-18 | Endeavour | STS-68 | RSLS | T-1 second | Sensor detected higher than acceptable readings of the discharge temperature of the high pressure oxidizer turbopump in SSME #3. Endeavour rolled back to VAB to replace all 3 engines. A test firing at Stennis Space Center confirmed a drift in the fuel flow meter which resulted in a slower start in the engine which caused the higher temperatures. |
Read more about this topic: Space Shuttle Abort Modes
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