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Technical Paper

The Extra Vehicular Removal of Foreign Object Debris from the International Space Station Node 1 Nadir Common Berthing Mechanism

2004-07-19
2004-01-2261
This Extra Vehicular Activity (EVA) removal of Foreign Object Debris (FOD) was performed on January 15, 2003. The concern began during post-flight inspections of the Passive Common Berthing Mechanism (PCBM) on the Utility Flight (UF) UF-2 (STS-111) Multipurpose Logistics Module (MPLM). ...Material analysis determined the debris contained Starblast™, a sandblasting material used to clean the launch pad. Debris corresponding to the MPLM CBM debris was found on the International Space Station (ISS) Node 1 Nadir CBM sealing surface during a Space Station Remote Manipulator System (SSRMS) camera survey of the Node 1 Nadir CBM. ...Since this MPLM had mated to Node 1 Nadir CBM during the UF-2 berthing, a conclusion was drawn that the debris was deposited on the Active Common Berthing Mechanism (ACBM) sealing surface (Node 1 Nadir CBM) from the UF-2 MPLM and that the ISS Node 1 Nadir CBM FOD contained the sandblasting material Starblast™.
Standard

Rotorcraft Engine Foreign Object Debris and Damage

2023-09-28
CURRENT
AIR4096A
The purpose of this SAE Aerospace Information Report (AIR) is to disseminate qualitative information regarding foreign object debris (FOD) damage to the gas path of rotorcraft gas turbine engines and to discuss methods of FOD prevention.
Technical Paper

Removal of Ergo-Tech® Blind Bolt with Hand Electrical Discharge Removal Tool

2010-09-28
2010-01-1845
Numerous benefits are found in using an electrical discharge handheld machine for removal. Ergo-Tech® fasteners can be removed in seconds instead of minutes. The removal process is silent, FOD free, and requires minimal force to be applied by the technician. ...All liquids and debris created by the removal process are contained within the system, and collected within the internal filtration system for simple operation. ...A new fastener removal system which utilizes the principle of electrical discharge machining is evaluated. The system is portable, and includes a handheld gun which is approximately the size of a typical fastener installation tool.
Technical Paper

Ambient Temperature Removal of Problematic Organic Compounds from ISS Wastewater

2002-07-15
2002-01-2534
The current design utilizes the Volatile Removal Assembly (VRA) which operates at 125°C to catalytically oxidize these contaminants. Since decomposition of these organics under milder conditions would be beneficial, several ambient temperature biocatalytic and catalytic processes were evaluated in our laboratory. ...Importantly, both alcohols and glycols were efficiently oxidized at ambient temperature using a highly active, bimetallic noble metal catalyst. Adsorption onto activated carbon formed from pyrolyzed polymeric beads was shown to be the most practical method for acetone removal. ...Adsorption onto activated carbon formed from pyrolyzed polymeric beads was shown to be the most practical method for acetone removal.
Standard

Aircraft Sealant Removal Techniques

2012-01-17
CURRENT
AIR3270A
This SAE Aerospace Information Report (AIR) provides information on the possible methods of sealant removal. The discussion will focus on the methods of sealant removal and give the strengths and weaknesses of each method.
Technical Paper

Removal of Trace Concentrations of Ethylene from Air by Biofiltration: Preliminary Results

1998-07-13
981614
No ethylene removal by the biofilter receiving air containing 1 ppm ethylene was observed, perhaps, because the loading rate was insufficient to maintain an active culture. ...No ethylene removal by the biofilter receiving air containing 1 ppm ethylene was observed, perhaps, because the loading rate was insufficient to maintain an active culture. Work is underway to further investigate these limits to enable improvement in biofilter performance.
Technical Paper

Advances in Commercial Engine Lube Debris Monitoring

1997-08-05
972603
Shortcomings in these critical maintenance actions, and/or wear modes which result in product failure between scheduled inspection intervals, compromise the effectiveness of this method of wear debris monitoring. The General Electric GE90 engine utilizes the Quantitative Debris Monitor (QDM ®), developed by Vickers, Tedeco Division. ...The QDM system - the first and only advanced, remote-indicating lube debris monitor qualified for commercial flight service - continuously monitors the lube oil for the presence of wear debris. The system is capable of counting individual debris particles and distinguishing their size relative to a preset “target” threshold. ...Wear debris monitoring is the most effective technique available for detecting impending failure of oil-wetted components.
Technical Paper

The Analysis of Space Debris and Micro-Meteoroid Impacts

2001-07-09
2001-01-2437
The increasing concern in the space debris to spacecraft, above all long-term missions as the international space station, has increased the demand of reliable analysis tools, raised from industry and agencies. ...The improvement of environment models and hypervelocity impact predictions has increased the physical available knowledge to software designers. The DEBRIS application of ESABASE is a software simulation tool to assess the number of impacts and the resulting damage from meteoroids and space debris particles to spacecraft in low Earth orbit for user specified mission parameters and shielding designs. ...The DEBRIS application of ESABASE is a software simulation tool to assess the number of impacts and the resulting damage from meteoroids and space debris particles to spacecraft in low Earth orbit for user specified mission parameters and shielding designs.
Technical Paper

Field Experience with Quantitative Debris Monitoring

1987-10-01
871736
The latest innovations in sensor technology now permit on-line oil debris based diagnostics to attain the same status as such more traditionally monitored system parameters as vibration, oil quantity, pressure and temperature. ...This technology will permit the early detection of fluid system component failures and the reduction of “no-fault-found” indications to an extent never before possible using conventional debris monitoring methods. This paper will discuss the details of this technology - in the form of new sensors, supporting integrated circuits and novel oil debris separator/filter combinations - for engine applications. ...This paper will discuss the details of this technology - in the form of new sensors, supporting integrated circuits and novel oil debris separator/filter combinations - for engine applications.
Standard

Flaring (Swaging) and Removal of Shank Nuts

2019-03-18
CURRENT
ARP4848A
To specify the approved method of flaring the shank of self-locking shank nuts, and to provide the preferred method for removal of damaged nut.
Technical Paper

Development of a Regenerable Metal Oxide Sheet Matrix CO2 Removal System

1992-07-01
921298
Hamilton Standard has developed a non-venting Metal Oxide Regenerable EMU CO2 Removal Subsystem (MORES) for the NASA Johnson Space Center. This system has the potential for application to an Advanced EMU or retrofit to the existing Shuttle EMU. ...The MORES system uses a catalyzed, silver based metal oxide to achieve the CO2 removal during Extravehicular Activity (EVA) and uses no supplemental cooling. Regeneration is easily accomplished using cabin air in a simple hot air regeneration process. ...However, total system weight, volume and complexity will increase with incorporation of an active cooling system. This paper details the history and current status of the MORES development activity at Hamilton Standard.
Technical Paper

Micrometeoroid and Orbital Debris Hazard Considerations for Space Station-Related EVA

1993-07-01
932225
Improved understanding of the orbital debris environment in recent years and the prospect of significantly increased extravehicular activity (EVA) for the assembly and maintenance of Space Station Freedom have resulted in increased focus on the potential hazards to the EVA crewmembers from the micrometeoroid and orbital debris environments. ...Improved understanding of the orbital debris environment in recent years and the prospect of significantly increased extravehicular activity (EVA) for the assembly and maintenance of Space Station Freedom have resulted in increased focus on the potential hazards to the EVA crewmembers from the micrometeoroid and orbital debris environments. While the hazards associated with any individual EVA remain extremely small, some estimates of the cumulative risks over the anticipated duration of the Space Station Program have been appreciable. ...These estimates, based on analytical models which treat the micrometeoroid and debris environments as isotropic, suggest the desirability of substantially modifying either the extravehicular mobility unit (EMU) or the planned EVA profiles for space station to reduce these hazards.
Technical Paper

CO2 Removal in Distressed Submarines: The Validation of the CFD Reaction Model Created to Represent a Chemical Based Passive Removal System for Royal Navy Submarines

2009-07-12
2009-01-2577
The British Royal Navy is currently deploying a new CO2 removal system for use in disabled submarines when the air circulation and monitoring system is shutdown. ...The reaction model is designed to depend only on the surrounding CO2 concentration and the quantity of active material remaining in the RPCs, and so can be applied to any simulation involving RPCs. The RPC reaction model has been validated against experimental data from RPC performance trials in a hyperbaric chamber.
Technical Paper

Active Thermal Control Design of COLUMBUS Pressurized Modules

1989-07-01
891518
This paper presents the active thermal control architecture of Columbus Pressurized Modules. APM (Attached Pressurized Module) and PM-MTFF (Pressurized Module, coupled to the Resource Modute to form the MTFF, Man Tended Free-Flyer). ...APM (Attached Pressurized Module) and PM-MTFF (Pressurized Module, coupled to the Resource Modute to form the MTFF, Man Tended Free-Flyer). Active thermal control architecture consists of: module- internal water loops collecting heat from directly interfacing P/L's and S/S's, avionic and cabin air loops external freon loop (PM MTFF only) providing removal and transportation of water loop heat loads to the heat rejection system SS (Space Station) based thermal bus providing removal and rejection of docked element water loops heat loads loop control and monitoring functions provided by modulating pumps and valves, temperature, pressure sensors interfacing with an intelligent control unit. ...Active thermal control architecture consists of: module- internal water loops collecting heat from directly interfacing P/L's and S/S's, avionic and cabin air loops external freon loop (PM MTFF only) providing removal and transportation of water loop heat loads to the heat rejection system SS (Space Station) based thermal bus providing removal and rejection of docked element water loops heat loads loop control and monitoring functions provided by modulating pumps and valves, temperature, pressure sensors interfacing with an intelligent control unit.
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