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NASA-LLIS-0007
Lessons Learned - Debonding of a Mounting Device (Shuttle Orbiter TV Monitor Bracket) due to Growth of a Pressurized Vessel such as the Crew Cabin Wall Following Launch
Year: 1991
Abstract: Description of Driving Event:
During two successive missions of the shuttle orbiter OV-99, a television monitor secured by a bracket that was bonded to the wall of the crew module, became detached from the wall (debonded). Following the first incident, it was assumed that an improper bonding technique was the cause of the failure. Remounting was accomplished under close surveillance by quality inspectors. Following the second incident, it was concluded that growth of the structural skin of the wall due to pressurization during flight caused the failure. It was explained that this did not occur on orbiter OV-102 because its wall is thicker and subject to less growth from pressurization. An object as large as a TV monitor detaching from its mount during any phase of a mission could become a hazard to personnel or equipment. The wall section of OV-99 used for mounting the monitor was stiffened with wall doublers to reduce growth from pressurization during launch.
During two successive missions of the shuttle orbiter OV-99, a television monitor secured by a bracket that was bonded to the wall of the crew module, became detached from the wall (debonded). Following the first incident, it was assumed that an improper bonding technique was the cause of the failure. Remounting was accomplished under close surveillance by quality inspectors. Following the second incident, it was concluded that growth of the structural skin of the wall due to pressurization during flight caused the failure. It was explained that this did not occur on orbiter OV-102 because its wall is thicker and subject to less growth from pressurization. An object as large as a TV monitor detaching from its mount during any phase of a mission could become a hazard to personnel or equipment. The wall section of OV-99 used for mounting the monitor was stiffened with wall doublers to reduce growth from pressurization during launch.
Subject: Flight Equipment
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T16:16:48Z | |
| date available | 2017-09-04T16:16:48Z | |
| date copyright | 04/29/1991 | |
| date issued | 1991 | |
| identifier other | TAYCQCAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/80161 | |
| description abstract | Description of Driving Event: During two successive missions of the shuttle orbiter OV-99, a television monitor secured by a bracket that was bonded to the wall of the crew module, became detached from the wall (debonded). Following the first incident, it was assumed that an improper bonding technique was the cause of the failure. Remounting was accomplished under close surveillance by quality inspectors. Following the second incident, it was concluded that growth of the structural skin of the wall due to pressurization during flight caused the failure. It was explained that this did not occur on orbiter OV-102 because its wall is thicker and subject to less growth from pressurization. An object as large as a TV monitor detaching from its mount during any phase of a mission could become a hazard to personnel or equipment. The wall section of OV-99 used for mounting the monitor was stiffened with wall doublers to reduce growth from pressurization during launch. | |
| language | English | |
| title | NASA-LLIS-0007 | num |
| title | Lessons Learned - Debonding of a Mounting Device (Shuttle Orbiter TV Monitor Bracket) due to Growth of a Pressurized Vessel such as the Crew Cabin Wall Following Launch | en |
| type | standard | |
| page | 2 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1991 | |
| contenttype | fulltext | |
| subject keywords | Flight Equipment | |
| subject keywords | Flight Operations | |
| subject keywords | Hardware | |
| subject keywords | Launch Vehicle | |
| subject keywords | Parts Materials & Processes | |
| subject keywords | Pressure Vessels |