America's Space Shuttle: EVA Contingency Operations NASA Astronaut Training Manual (CONT OPS 2102)
National Aeronautics and Space Administration (NASA), World Spaceflight News
Smashwords Edition
Copyright 2012 Progressive Management
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Space Shuttle EVA Contingency Operations Training Workbook
CONT OPS 2102
Section 1: Extravehicular Activity Introduction
1.1 Objectives
The extravehicular activity (EVA) contingency operations (CONT OPS) lesson will enable the student to describe the operation of the payload bay doors (PLBDs) and radiators (RADs) under nominal conditions, and to describe the EVA procedures and tools required to operate them during off-nominal conditions as required to deorbit. This lesson will also describe the use of EVA to configure the payload bay (PLB) for deorbit. This includes retracting, securing, or jettisoning payloads for PLBD operations and deorbit. The remote manipulator system (RMS) is also included in these contingency operations.
1.2 EVA Classification
1.2.1 Basic Classes
There are three basic categories of EVA, defined as follows:
• Scheduled EVA - This is defined as any EVA incorporated into the normal crew activity plan (CAP) for the mission.
• Unscheduled EVA-This is an EVA that is not part of the CAP, and is conducted to achieve or enhance the mission objectives of the Orbiter or payloads.
• Contingency EVA - This is an EVA that will require the crewmembers to perform the appropriate tasks to ensure the safe return of the Orbiter and flightcrew.
1.2.2 Characteristics
Complexity - An EVA task is classified as simple, intermediate, or complex
• Simple - A simple payload EVA requires minimal unique tools, mockups, or mobility aids. Existing procedures and techniques may be adapted to particular EVA requirements. Minimal crew training will be required.
• Intermediate - An intermediate payload EVA requires development of new tools and equipment. The cost for development of new payload-unique tools and equipment will be charged as a separate optional service. Some procedure and technique development will be required and more extensive training will be necessary to accomplish the task.
• Complex - A complex payload EVA requires the design and development of complex or elaborate tools and equipment. The tasks require extension of basic capabilities and may pose difficulties in access or restraint. Procedure and technique development will be extensive, as will the crew training requirements.
Section 2: Baseline STS EVA Provisions
2.1 Objectives
Upon completion of this section, you will be able to describe the function and use of the EVA support equipment available to the EVA crewmember.
You will know the location of all equipment and be able to match the proper tool to the task to be performed. See table 2-1.
Table 2-1.-EVA support equipment
Component / Function
1. Crewmember safety tether (35 ft)
Crewmember restraint while providing access to a large area such as the PLB
2. Slidewire
Crewmember restraint providing PLB access
3. Tethers
Waist tether
Wrist tether
Provide restraint of crewmember to the Orbiter and are used to transport/secure tools to the suited crewmember
4. Handrails
RMS handrail
Aid in crewmember translation or restraint to accomplish a specific task
5. Miniwork station
Provides stowage for small hand tools and assists in restraining crewmember at the job site