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NASA-LLIS-4417
Lessons Learned Shuttle Orbiter Airlock Hatch Failure Caused By Loose Screw On STS-80 Prevented Two Planned Mission EVAs
Year: 2011
Abstract: During the Space Shuttle STS-80 mission, the two planned Extravehicular Activities (EVA) were scrubbed when the astronauts discovered that the outer airlock hatch would not open. This impacted the plan to evaluate the EVA tools that would be used for the construction and maintenance of the International Space Station.
Upon return from the mission, troubleshooting revealed that the airlock actuator that is used for latching and unlatching the hatch was defective. This actuator was removed and replaced. Troubleshooting on the removed actuator revealed that a small screw had come loose from an internal assembly and lodged in the planetary gears of the actuator. Space Shuttle Program Corrective Action Record Number AE0959-010 documented this problem. The Failure/Problem Report Number NSLAD-RE-97-044 documented the actuator findings. Both of these reports are attached to this Lesson Learned input.
Upon return from the mission, troubleshooting revealed that the airlock actuator that is used for latching and unlatching the hatch was defective. This actuator was removed and replaced. Troubleshooting on the removed actuator revealed that a small screw had come loose from an internal assembly and lodged in the planetary gears of the actuator. Space Shuttle Program Corrective Action Record Number AE0959-010 documented this problem. The Failure/Problem Report Number NSLAD-RE-97-044 documented the actuator findings. Both of these reports are attached to this Lesson Learned input.
Subject: Engineering design and project processes and standards
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T16:05:06Z | |
| date available | 2017-09-04T16:05:06Z | |
| date copyright | 08/01/2011 | |
| date issued | 2011 | |
| identifier other | RVEONEAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/68382 | |
| description abstract | During the Space Shuttle STS-80 mission, the two planned Extravehicular Activities (EVA) were scrubbed when the astronauts discovered that the outer airlock hatch would not open. This impacted the plan to evaluate the EVA tools that would be used for the construction and maintenance of the International Space Station. Upon return from the mission, troubleshooting revealed that the airlock actuator that is used for latching and unlatching the hatch was defective. This actuator was removed and replaced. Troubleshooting on the removed actuator revealed that a small screw had come loose from an internal assembly and lodged in the planetary gears of the actuator. Space Shuttle Program Corrective Action Record Number AE0959-010 documented this problem. The Failure/Problem Report Number NSLAD-RE-97-044 documented the actuator findings. Both of these reports are attached to this Lesson Learned input. | |
| language | English | |
| title | NASA-LLIS-4417 | num |
| title | Lessons Learned Shuttle Orbiter Airlock Hatch Failure Caused By Loose Screw On STS-80 Prevented Two Planned Mission EVAs | en |
| type | standard | |
| page | 4 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;2011 | |
| contenttype | fulltext | |
| subject keywords | Engineering design and project processes and standards | |
| subject keywords | Lander Systems | |
| subject keywords | Launch Systems | |
| subject keywords | Level II/III requirements definition | |
| subject keywords | Logistics and maintenance |