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NASA-LLIS-0004
Lessons Learned - Flight Hardware Damage (Tires) due to Ground Test System Operational Conditions Outside of Design Limits
Year: 1991
Abstract: Description of Driving Event:
On November 21, 1989 two shuttle orbiter tires skidded sufficiently to cause blowouts following the application of brakes during a ground test at Wright Patterson Air Force Base. The skidding was caused by the brakes locking due to the failure of the anti-skid system. This failure was due to the use of non-flight switching valves as part of the test stand. Additional damage occurred to a hydraulic hose and quick disconnect fitting. An investigation also discovered an error in the abort software and the addition of excessively restrictive non-flight orifices in the brake hydralic lines. All of these findings contributed to the failure.
On November 21, 1989 two shuttle orbiter tires skidded sufficiently to cause blowouts following the application of brakes during a ground test at Wright Patterson Air Force Base. The skidding was caused by the brakes locking due to the failure of the anti-skid system. This failure was due to the use of non-flight switching valves as part of the test stand. Additional damage occurred to a hydraulic hose and quick disconnect fitting. An investigation also discovered an error in the abort software and the addition of excessively restrictive non-flight orifices in the brake hydralic lines. All of these findings contributed to the failure.
Subject: Configuration Management
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T15:22:03Z | |
| date available | 2017-09-04T15:22:03Z | |
| date copyright | 04/19/1991 | |
| date issued | 1991 | |
| identifier other | NAYCQCAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/22073 | |
| description abstract | Description of Driving Event: On November 21, 1989 two shuttle orbiter tires skidded sufficiently to cause blowouts following the application of brakes during a ground test at Wright Patterson Air Force Base. The skidding was caused by the brakes locking due to the failure of the anti-skid system. This failure was due to the use of non-flight switching valves as part of the test stand. Additional damage occurred to a hydraulic hose and quick disconnect fitting. An investigation also discovered an error in the abort software and the addition of excessively restrictive non-flight orifices in the brake hydralic lines. All of these findings contributed to the failure. | |
| language | English | |
| title | NASA-LLIS-0004 | num |
| title | Lessons Learned - Flight Hardware Damage (Tires) due to Ground Test System Operational Conditions Outside of Design Limits | en |
| type | standard | |
| page | 2 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1991 | |
| contenttype | fulltext | |
| subject keywords | Configuration Management | |
| subject keywords | Ground Equipment | |
| subject keywords | Ground Operations | |
| subject keywords | Test & Verification | |
| subject keywords | Test Article | |
| subject keywords | Test Facility |