STS-109 Extravehicular Activity

  • EVA Timeline

  • Spacewalk Number One, Flight Day Four: Replace -V2 Solar Array and
    Diode Box Assembly, Install Diode Box Controller Cross Strap Harness

  • Spacewalk Number Two, Flight Day Five: Replace +V2 Solar Array and
    Diode Box Assembly and Reaction Wheel Assembly-1

  • Spacewalk Number Three, Flight Day Six: Replace Power Control Unit
    (PCU)

  • Spacewalk Number Four, Flight Day Seven: Replace Faint Object Camera
    with the Advanced Camera for Surveys, Install Electronics Support Module
    and Perform Power Control Unit Cleanup Tasks

  • Spacewalk Number Five, Flight Day Eight: Install the Near-Infrared Camera
    and Multi-Object Spectrometer (NICMOS) Cryogenic Cooler and NICMOS
    Cooling System Radiator

  • Astronauts John Grunsfeld, Rick Linnehan, Jim Newman and Michael Massimino will team
    up during STS-109 to perform five spacewalks, or Extravehicular Activities (EVAs) , on
    consecutive days to maintain and upgrade the Hubble Space Telescope. The astronauts
    will perform the spacewalks in pairs on alternating days, providing each team a day to nsta
    between ventures outside the shuttle. Grunsfeld and Linnehan will perform the first, third
    and fifth spacewalks. Newman and Massimino will perform the second and fourth
    spacewalks. Although not scheduled, resources are planned to be available for a sixth
    spacewalk to be conducted if needed to complete the planned telescope servicing tasks.

    For all of the spacewalks, Astronaut Nancy Currie will serve as prime robotic arm operator
    from controls in Columbia’s aft cockpit. Commander Scott Altman will be her backup. Currie
    will maneuver the arm to position the spacewalkers, one of whom will be working in a foot
    platform at the end of the arm the majority of the time. During the work outside, the
    astronauts can be identified by the markings on their spacesuits.

    Recognizing the spacewalkers:

    • Grunsfeld, Extravehicular Crewmember 1 (EV1) –solid red stripes on suit
    • Linnehan, EV2 –solid white suit (no stripes)
    • Newman, EV3 ?horizontal broken red stripes
    • Massimino, EV4 –diagonally broken red stripes

    Spacewalk Number One, Flight Day Four: Replace -V2 Solar Array and
    Diode Box Assembly, Install Diode Box Controller Cross Strap Harness

    Grunsfeld and Linnehan will begin the spacewalks with the first excursion outside of
    Columbia planned to occur on Flight Day Four of the mission, the day after Columbia
    captures the telescope. Planned to last 6 1/2 hours, the first spacewalk will include the
    replacement of one of the telescope’s two second-generation solar arrays (SA2), the array
    that will be on Columbia’s starboard side as the telescope is oriented in the shuttle bay.
    Both of the solar array wings will have been retracted the day before, about 4 1/2 hours after
    the telescope is latched in the shuttle payload bay. The SA2 array will be replaced with a
    third-generation array (SA3) that is more powerful and more durable. During most of the
    solar array work, the first 4 1/2 hours of the spacewalk, Linnehan will be working from the
    foot platform at the end of Columbia’s robotic arm. After that, Grunsfeld will work from the
    end of the arm and Linnehan will work free-floating.

    To begin, Grunsfeld does various tasks to prepare for that day’s servicing activities. These
    include deploying the Axial Science Instrument Protective Enclosure (ASIPE) mini-
    Translation Aid (TA), deploying the port and starboard TAs as required, removing the
    Manipulator Foot Restraint (MFR) from its stowage location and installing it on the RMS
    grapple fixture, installing the Low Gain Antenna Protective Cover (LGAPC), removing the
    Berthing and Positioning System (BAPS) Support Post (BSP) from its stowage location and
    installing it on the Flight Support System (FSS), and inspecting the P105 and P106
    umbilical covers. Meanwhile, Linnehan brings out of the airlock the Crew Aids and Tools
    (CATs) and installs the MFR handrail to the MFR on the RMS.

    The BSP is required to dampen the vibration that the servicing activities will induce into the
    deployed SAs. Before the BSP installation, the crew will pivot the support structure to bring
    HST to an 85-degree angle. The two center push-in pull-out (PIP) pins are installed each
    day and removed each night in case the shuttle must make a emergency return to Earth.
    Grunsfeld removes the BSP from its stowage position in the FSS cradle, and the installs
    one end to the BAPS ring with a PIP pin and the aft end to the FSS cradle with another PIP
    pin. Finally the BSP is commanded to its 90-degree limit and the two center PIP pins are
    installed.

    After the initial setup, the spacewalkers will replace the -V2 Solar Array and Diode Box
    Assembly on the Telescope. They will also install the Diode Box Controller (DBC) cross-
    strap harness. First, Grunsfeld, who is free floating, retrieves the HST PFR and APE and
    transfers them to Linnehan in the MFR. Linnehan moves to the HST and installs the PFR
    on HST foot restraint receptacle eight for Grunsfeld to use. Grunsfeld translates to the RAC
    to retrieve the DBC cross-strap harness and a Portable Connector Tray, and temporarily
    stows them on the telescope. Then he ingresses the PFR. Together the astronauts retract
    the -V2 SA2 Primary Deployment Mechanism (PDM). Grunsfeld then engages the PDM
    lock and installs the Portable Connector Tray. While still in the PFR, Grunsfeld demates the
    SA2 connectors from the DBA while Linnehan retrieves the WFPC Cover and installs it on
    the -V3 Aft Shroud in support of the PCU change-out on spacewalk number three.

    Next the Astronauts remove the -V2 SA2 from the Telescope. They disengage the Solar
    Array Drive Adapter (SADA) Clamp, remove SA2, translate it to the RAC and install it on
    the starboard shelf via the SADA Clamp and forward constraint PIP pin mechanical
    attachments.

    Grunsfeld translates back to the telescope and removes the -V2 DBA by disengaging the
    remaining X-connector drive mechanism and releasing the four J-hook bolts while Linnehan
    retrieves the DBA2 from the RAC and carries it to Grunsfeld at the telescope worksite. The
    astronauts swap hardware and Grunsfeld installs the DBA2 on the telescope while
    Linnehan translates to the RAC with the DBA and installs it and closes its thermal cover.
    Grunsfeld installs the DBC cross-strap harness onto the telescope and mates it to the -V2
    DBA2.

    With the DBA2 now installed on the telescope, the astronauts begin the installation work for
    the new, third-generation solar array (SA3). Both translate to the RAC. Linnehan
    disengages Latch 5, deploys the mast and engages the two mast bolts. Grunsfeld
    ingresses the aft PFR, releases and pivots Latch 3 to clear the tang, disengages the two
    tang bolts, stows the tang and engages the two tang bolts. Linnehan disengages Latch 2.
    Grunsfeld pivots Latch 3 to the stowed position and installs the PIP pin, deploys the MLI
    flap over the tang interface and releases Latch 4. Grunsfeld stabilizes SA3 while Linnehan
    releases Latch 1. The astronauts the remove SA3 from the RAC.

    Both crewmembers install SA3 onto the telescope by properly orienting SA3 and inserting
    the SADA into the SADA Clamp until the three soft dock tangs engage. Grunsfeld engages
    the SADA Clamp closed and mates the SA3 electrical interfaces. Linnehan translates back
    to the RAC and performs the SA2 closeout work, engaging the aft latch, the forward latch
    and the two forward constraint bolts.

    Then the astronauts deploy the SA3 panel, engage the panel locking bolts and release the
    SA3 brake. Grunsfeld routes the DBC cross-strap harness to the +V2 side, removes the
    HST PFR and temporarily stows it on the ASIPE, and removes and stows a Portable
    Connector Tray on the RAC. Meanwhile, Linnehan maneuvers to the -V3 aft shroud and
    installs the two FHST covers in preparation for the PCU change-out on spacewalk three.

    At this time, the astronauts switch places: Grunsfeld ingresses the arm foot platform and
    Linnehan becomes the free floater. Linnehan translates to the ASIPE, retrieves the PFR
    from temporary stowage and transfers it to Grunsfeld, who installs it in foot restraint
    receptacle 19 in preparation for spacewalk two. Linnehan retrieves the Bay 10 Thermal Cover and installs it over Bay 10 of the Telescope while Grunsfeld disengages and
    removes the telescope’s +V2 trunnion EPS panel, mates the DBC cross strap harness and
    installs a MLI tent over the EPS panel cavity.

    For the daily closeout, Linnehan inspects the FSS main umbilical mechanism, disengages
    the two center PIP pins on the BSP, retracts the mini-TA, retracts the port and starboard
    TAs if required, and takes a tool inventory. Meanwhile, Grunsfeld prepares the CATs
    installed on the MFR handrail for return into the airlock and egresses the MFR. Linnehan
    releases the MFR safety tether from the grapple fixture for contingency Earth return. With
    that complete, the astronauts return to the airlock and Columbia’s cabin.

    Spacewalk Number Two, Flight Day Five: Replace +V2 Solar Array and
    Diode Box Assembly and Reaction Wheel Assembly-1

    For spacewalk two, Newman will be free floating and Massimino will work from the arm foot
    platform. The major objectives are to replace the +V2 Solar Array, the array oriented toward
    Columbia’s port side, and the Diode Box Assembly on the telescope and complete the DBC
    installation by mating it to the +V2 SA3. They also will replace the Reaction Wheel
    Assembly ?1 (RWA-1).

    Fewer daily setup tasks are required for spacewalk two than for spacewalk one. After
    completing the airlock egress procedure, Newman reconnects the safety strap on the MFR,
    installs the two BSP center PIP pins and deploys the mini-TA. Massimino exits the airlock
    with the spacewalk two required CATs installed on the MFR handrail and installs the MFR
    handrail.

    After completing the daily setup tasks, the astronauts begin the tasks for the +V2 Solar
    Array and Diode Box Assembly change-outs, which are similar to the -V2 Solar Array
    and Diode Box Assembly change-outs performed during the first spacewalk. First,
    Newman and Massimino retrieve the HST PFR and APE and install them on HST foot
    restraint receptacle 19. Newman translates to the RAC to retrieve a Portable connector
    Tray and temporarily stows it on the telescope. Then he ingresses the PFR.
    Together the astronauts retract the +V2 SA2 PDM. Newman then engages the PDM lock
    and installs the Portable Connector Tray. Still in the PFR, Newman demates the SA2
    connectors from the DBA while Massimino disengages five of six bolts on each door of
    HST Bays 2, 3 and 4 in support of the PCU change-out during the third spacewalk.

    Next, the astronauts remove the +V2 SA2 from the telescope. They disengage the
    SADA Clamp, remove SA2, translate it to the RAC and install it on the port shelf via the
    SADA Clamp and forward constraint PIP pi mechanical attachments.
    Newman translates back to the telescope and removes the +V2 DBA by disengaging the
    remaining X-connector drive mechanism and releasing the four J-hook bolts while
    Massimino retrieves the DBA2 from the RAC and translates it to Newman at the telescope
    worksite. The astronauts swap hardware and Newman installs the DBA2 on the telescope
    while Massimino translates to the RAC with the DBA and installs it and closes its thermal
    cover.

    With the +V2 DBA2 now installed on the telescope, they begin installation work for the
    replacement Solar Array (SA3). Both astronauts translate to the RAC. Massimino
    disengages Latch 5, deploys the mast, and engages the two mast bolts. Newman
    ingresses the forward PFR, releases and pivots Latch 3 to clear the tang, disengages the
    two tang bolts, stows the tang and engages the two tang bolts. Massimino disengages
    Latch 2. Newman pivots Latch 3 to the stowed position and installs the PIP pin, deploys the
    MLI flap over the tang interface and releases Latch 4. Newman stabilizes SA3 while
    Massimino releases Latch 1. Both remove SA3 from the RAC.

    Working together, the astronauts install SA3 onto the telescope by properly orienting SA3
    and inserting the SADA into the SADA Clamp until the three soft dock tangs engage.
    Newman engages the SADA Clamp closed and mates the SA3 electrical interfaces, then
    mates the DBC cross-strap harness to the +V2 DBA2. Massimino translates back to the
    RAC and performs the SA2 closeout work: engaging the aft latch, the forward latch and the
    two forward constraint bolts.

    Both astronauts work together again to deploy the SA3 panel, engage the panel locking
    bolts and release the SA3 brake. Newman removes the HST PFR and APE and stows
    them on the FSS, and removes and stows the Portable Connector Tray on the RAC.
    Upon completion of the SA changeout task, the spacewalkers will replace the RWA-1.
    Newman translates to the Large Orbital Replacement Unit Protective Enclosure (LOPE) on
    the aft starboard side of the Multi-Use Lightweight Equipment (MULE), opens the lid,
    removes the two RWA1-R wing tab connectors from the LOPE pouch and secures them to
    the RWA1-R handle Velcro, disengages the three keyway bolts, removes the replacement
    RWA-1 (RWA1-R), and translates to the top of the starboard MULE.

    Massimino maneuvers to Bay 6 and opens the Bay 6 door, demates the two RWA-1 wing
    tab heater connectors from the heater bracket, demates the two RWA-1 wing tab
    connectors from RWA-1, disengages the three RWA-1 keyway bolts, and removes RWA-1
    from HST Bay 6. Then he maneuvers to the starboard MULE location and performs a
    RWA swap with Newman. Massimino the maneuvers with RWA1-R to the Bay 6 worksite,
    installs it on HST, engages the three keyway bolts, and mates the four wing tab electrical
    connectors. Then he closes the Bay 6 door.

    Newman, after transferring the RWA1-R to Massimino and receiving RWA-1, translates
    back to the LOPE, installs the RWA-1 in the LOPE, engages the three keyway bolts, stows
    the two wing tab connectors in the LOPE pouch, and closes the LOPE lid.

    Newman retrieves the Bay 5 Thermal Cover and installs it in the retracted position on the
    HST Bay 5 in preparation for the PCU change-out on spacewalk three. Newman also
    retrieves the doorstop extensions and installs them on the +V2 aft shroud doorstops in
    preparation for the NCS Radiator installation on spacewalk five.

    For the daily closeout, Newman inspects the FSS main umbilical mechanism, disengages
    the two center PIP pins on the BSP, retracts the mini-TA, retracts the port and starboard
    TAs if required and takes a tool inventory. Meanwhile, Massimino prepares the CATs
    installed on the MFR handrail for return into the airlock and egresses the MFR. Newman releases the MFR safety tether from the grapple fixture for contingency Earth return. Then
    the astronauts return to the airlock and Columbia’s cabin.


    Spacewalk Number Three, Flight Day Six: Replace Power Control Unit
    (PCU)

    During the third spacewalk, Grunsfeld and Linnehan will replace the PCU in HST Bay 4.
    They begin the spacewalk with Grunsfeld free floating and Linnehan working from the arm
    foot platform but switch places after about three hours. The third spacewalk is planned to
    last about seven hours.

    After they exit the airlock, Grunsfeld reconnects the safety strap on the MFR, installs the
    two BSP center PIP pins and deploys the mini-TA. Linnehan exits the airlock with the
    spacewalk three required CATs installed on the MFR handrail and installs the MFR
    handrail.

    Both astronauts complete the daily setup tasks, and then begin the PCU change-out.
    Grunsfeld translates to the RAC to retrieve the Power Distribution U it (PDU) fuse plug
    caddy and battery stringers and transfers them to Linnehan. Linnehan translates to HST
    Bay 3, opens the bay door, demates the three battery connectors, installs caps to deadface
    the battery power and temporarily closes the door. He then translates to Bay 2 and
    performs the same procedure for the Bay 2 battery.

    Meanwhile, Grunsfeld translates to Bay 5 and deploys the thermal cover, retrieves the DBA
    thermal cover, translates to the +V2 DBA2 and installs its thermal cover. Then he translates
    to Bay 10 and deploys the thermal cover, retrieves the DBA thermal cover, translates to the
    -V2 DBA2 and installs its thermal cover. Grunsfeld deploys the FHST covers on the
    telescope, then translates to the SAC, retrieves the Harness Retention Device and
    transfers it to Linnehan at the Bay 4 worksite.

    Linnehan opens the Bay 4 door and installs the Harness Retention Device and door stay.
    Linnehan then removes the six in -board PDU Fuse Plugs to gain sufficient access to the
    PCU connectors on the left side. Grunsfeld retrieves the PCU handhold from the SAC and
    temporarily stows it by the +V2 trunnion. The he translates to the airlock and recharges
    his suit with oxygen, enabling him to extend his EVA time. Linnehan disengages seven of
    10 PCU keyway bolts and demates all but the last six connectors.

    At this point, Grunsfeld and Linnehan switch places: Grunsfeld begins work from the arm
    foot platform and Linnehan works free-floating for the remainder of the spacewalk.
    Grunsfeld completes demating the remaining PCU connectors, installs the PCU handhold,
    disengages the three remaining bolts, disengages the PCU ground strap and removes the
    PCU from the telescope.

    Linnehan translates to the starboard SAC where the replacement PCU (PCU-R) is located,
    ingresses the PFR, opens the thermal cover, disengages the six keyway bolts and removes
    the PCU-R from the SAC. Linnehan and Grunsfeld swap boxes at the SAC worksite.
    Grunsfeld translates with the PCU-R back to the telescope worksite, installs it, engages
    seven keyway bolts and engages the ground strap. Linnehan stows the PCU on the SAC, engages the six keyway bolts, retightens the two PCU handhold wing bolts, egresses the
    PFR and reinstalls the PCU thermal cover. He then translates to the airlock and recharges
    his suit with oxygen. Grunsfeld mates the 36 connectors on the PCU-R, a difficult and time-
    consuming task.

    Linnehan inspects the HST exterior handrails to be used for the ACS and NCS tasks on the
    fourth and fifth spacewalks, and, if required, installs handrail covers. Grunsfeld reinstalls
    the PDU fuse plugs, removes the Harness Retention Device, removes the door stay, and
    closes the HST Bay 4 door with one J-bolt. He re-opens the Bay 3 door, remates the
    battery connectors and closes the door with one J-bolt. Then he performs the same
    procedure for the Bay 2 battery. After the PDU fuse plugs are reinstalled, Linnehan
    translates to the +V2 DBA2, retrieves the thermal cover, stows it on its Bay 5 thermal cover
    stowage pouch and retracts the Bay 5 thermal cover. He translates to the -V2 DBA2,
    retrieves the thermal cover, stows it on its Bay 10 thermal cover stowage pouch and
    retracts the Bay 10 thermal cover. Next, Linnehan retrieves the Harness Retention Device
    and stows it on the SAC. Then, he retracts the FHST covers, receives the PDU fuse plug
    caddy and battery stringers from Grunsfeld, and stows them on the RAC. If time allows,
    Grunsfeld removes the WFPC thermal cover and stows it on the SAC.

    For the daily closeout, Linnehan inspects the FSS main umbilical mechanism, disengages
    the two center PIP pins on the BSP, retracts the mini-TA, retracts the port and starboard
    TAs if required and takes a tool inventory. Meanwhile, Grunsfeld prepares the CATs
    installed on the MFR handrail for return into the airlock and egresses the MFR. Linnehan
    releases the MFR safety tether from the grapple fixture for contingency Earth return. Then
    the astronauts return to the airlock, completing the third spacewalk.

    Spacewalk Number Four, Flight Day Seven: Replace Faint Object Camera
    with the Advanced Camera for Surveys, Install Electronics Support Module
    and Perform Power Control Unit Cleanup Tasks

    On the fourth spacewalk, Newman begins work in the arm foot platform and Massimino
    works free-floating. The two spacewalkers switch work locations about halfway through the
    planned 6 1/2 -hour spacewalk. The major objectives are to replace the Faint Object Camera
    (FOC) with the new Advanced Camera for Surveys (ACS), an instrument with 10 times the
    discovery power; install an Electronics Support Module (ESM), part of NICMOS cryocooler
    installation the next day, in the telescope’s aft shroud; and do the remaining PCU cleanup
    tasks. After exiting the airlock, Massimino reconnects the safety strap on the MFR, installs
    the two BSP center PIP pins and deploys the mini-TA. Newman exits the airlock with the
    spacewalk four required CATs installed on the MFR handrail and installs the MFR handrail.

    The astronauts complete the daily setup tasks, and then begin the FOC/ACS change-out.
    Massimino deploys the aft fixture, retrieves the COSTAR Y-harness from the RAC port
    ATM and stows it on the telescope aft shroud. Newman opens the -V2 aft shroud doors.
    Massimino and Newman work together to remove the FOC from HST. Massimino demates
    the four FOC connectors, disconnects the FOC purge line and disconnects the ground
    strap. Newman disengages the FOC A-Latch and Massimino disengages the FOC B-Latch.
    Then Newman removes the FOC from the telescope and stows it on the aft fixture.

    Massimino and Newman now work together to install the Cross Aft Shroud Harness
    (CASH). Even though the CASH is part of the NCS installation, it is installed now for
    maximum efficiency. Its early installation eliminates the need to open the -V2 aft shroud
    doors a second time during the fifth spacewalk. Massimino and Newman retrieve the CASH
    from the SAC and install it on handrails inside the aft shroud.
    Massimino and Newman retrieve the ACS from the ASIPE. Massimino configures the aft
    ASIPE PFR, opens the ASIPE lid, disconnects the ACS ground strap and deploys the B-
    Latch alignment aid. Newman disengages the A-Latch and Massimino disengages the B-
    Latch. They both remove the ACS from the ASIPE. Massimino closes the ASIPE lid and
    engages one lid latch to maintain thermal stability inside the ASIPE. The astronauts
    continue to work together to install the ACS in to the telescope aft shroud. They insert the
    ACS along the guide rails, deploy the B-Latch alignment aid arm, engage the B-Latch and
    A-Latch, stow the alignment aid, tether the ESM ground strap to the ACS handrail, reinstall
    the HST ground strap and mate the four ACS connectors.

    Next the astronauts install the FOC into the ASIPE. Newman retrieves the FOC from the aft
    fixture while Massimino re-opens the ASIPE lid. Newman inserts the FOC in to the ASIPE
    guide rails while Massimino stows the aft fixture and engages the FOC B-Latch. Newman
    engages the A-Latch. Massimino disengages the FOC ground strap bolt and installs the
    ground strap on FOC, then closes the ASIPE lid and engages the five lid latches.

    After completing the FOC installation into the ASIPE, the astronauts switch work locations,
    with Massimino climbing into the arm foot platform and Newman becoming the free-floating
    spacewalkers. Then they retrieve the ESM from the MULE and install it in the -V2 aft
    shroud. They install the ACS ESM ground strap on the ESM, retrieve the Y-harness from
    temporary stowage, demate the four COSTAR connectors, mate four Y-harness connectors
    to the COSTAR harnesses, mate four Y-harness connectors to COSTAR and mate four Y-
    harness connectors to the ESM. Massimino mates the four CASH connectors to the ESM.
    Now they are ready to close the -V2 aft shroud doors.

    The PCU cleanup task follows the FOC/ACS change-out and the ESM installation.
    Newman removes the Bay 10 thermal cover and stows it on the ASIPE, then removes the
    Bay 5 thermal cover and stows it on the ASIPE. He also articulates the aft ASIPE PFR to its
    landing configuration. Meanwhile, Massimino engages the remaining 5 J-bolts on each
    door of Bays 2, 3 and 4. The astronauts remove the FHST and WFPC covers from the
    telescope and stow them on the SAC.

    For the daily closeout, Newman inspects the FSS main umbilical mechanism, disengages
    the two center PIP pins on the BSP, retracts the mini-TA, retracts the port and starboard
    TAs if required and takes a tool inventory. Meanwhile, Massimino prepares the CATs
    installed on the MFR handrail for return into the airlock and egresses the MFR. Newman
    releases the MFR safety tether from the grapple fixture for contingency Earth return. Then
    they reenter the airlock and Columbia, completing the spacewalk.


    Spacewalk Number Five, Flight Day Eight: Install the Near-Infrared Camera
    and Multi-Object Spectrometer (NICMOS) Cryogenic Cooler and NICMOS
    Cooling System Radiator


    During the fifth spacewalk, Grunsfeld will begin work from the arm platform and Linnehan
    will work free-floating. They will switch locations halfway through the seven-hour
    spacewalk. The major objectives are to install the NICMOS Cooling System, a NICMOS
    Cryogenic Cooler (NCC) and NICMOS Cooling System (NCS) Radiator. After they exit the
    airlock, Linnehan reconnects the safety strap on the MFR, installs the two BSP center PIP
    pins, and deploys the mini-TA. Grunsfeld exits the airlock with the spacewalk five CATs
    installed on the MFR handrail and installs the MFR handrail.

    Both astronauts complete the daily setup tasks, and then begin the NCS installation.
    Grunsfeld opens the telescope’s +V2 aft shroud doors while Linnehan retrieves the Cryo
    Vent Line (CVL) bag and NCS sock bag from the RAC port ATM and the NCC ground strap
    and cryo vent insert from the RAC starboard ATM. Together the astronauts prepare the
    NICMOS for the NCS installation. They remove the NICMOS CVL and stow it in the CVL
    bag, close the NICMOS vent line valve, disengage the NICMOS ground strap from
    NICMOS, install the NCC ground strap adapter on NICMOS and install the cryo vent insert.

    Linnehan retrieves the P600 harness from the RAC starboard ATM. Grunsfeld retrieves the
    NCC from the SAC and opens the neon bypass valve while Linnehan closes the NCC
    contamination cover.
    Both astronauts install the NCC into the HST aft shroud. Grunsfeld installs the NCC ground
    strap on NCC and mates the four CASH connectors. Linnehan translates to the MULE a d
    releases some of the NCS Radiator latches and shear ties. At this point, they switch
    locations, with Linnehan working from the arm foot platform and Grunsfeld free-floating for
    the remainder of the spacewalk.

    Next comes retrieval of the NCS Radiator. Grunsfeld closes the left aft shroud door and
    together with Linnehan disengages the remaining latches, removes the NCS Radiator from
    the MULE and opens the NCS Radiator handrail latches. They install the NCS Radiator
    onto the exterior of the telescope aft shroud.

    Grunsfeld prepares the NCC by installing the coolant-in and coolant-out cryo valve heaters
    and neon lines while Linnehan installs the NCC power cable to the EPS test panel and
    reinstalls the MLI tent. They install the NCS Radiator conduit through the cryo vent insert
    opening in the aft bulkhead and engage the cryo vent insert latches and locking bolts. The
    the NCS Radiator harnesses are mated to the NCS, the NCC saddle thermal cover opened
    and the CPL evaporator removed from the sock and tethered to the bulkhead standoff by
    Grunsfeld. Linnehan opens the NCS Radiator diode box, checks some LEDs and switches,
    and closes the diode box cover. He installs the CPL evaporator in the saddle, installs the
    saddle cover, engages its two bolts and closes the NCC saddle thermal cover. Together
    the astronauts close the aft shroud doors.

    The final closeout procedure follows the NCS installation. Grunsfeld inspects the FSS main
    umbilical mechanism and the P105/P106 covers, removes the LGA protective cover from
    the telescope and reinstalls it on the FSS, disengages the two center PIP pins on the BSP,
    retracts the mini-TA, retracts the port and starboard TAs, if required, to their landing
    configurations and takes a tool inventory. Meanwhile, Linnehan prepares the CATs
    installed on the MFR handrail for return into the airlock, egresses the MFR and performs
    the MFR stow procedure. That completes the fifth spacewalk.

    Flight Plan for STS-109: Summary Timeline

    Flight
    Day 1
    Flight
    Day 2
    Flight
    Day 3
    Flight
    Day 4
    Flight
    Day 5
    Flight
    Day 6

    Original
    Flight Plan
    (30 Kb PDF)

    Original
    Flight Plan
    (36 Kb PDF)

    Detail
    Schedule Update – 03/01/2002
    (180 Kb PDF)

    Summary
    Schedule Update – 03/01/2002
    (38 Kb PDF)

    Original
    Flight Plan
    (38 Kb PDF)

    Detail
    Schedule Update – 03/02/2002
    (152 Kb PDF)

    Original
    Flight Plan
    (36 Kb PDF)

    Detail
    Schedule Update – 03/03/2002
    (142 Kb PDF)

    Summary
    Schedule Update – 03/03/2002
    (41 Kb PDF)

    Original
    Flight Plan
    (37 Kb PDF)

    Original
    Flight Plan
    (39 Kb PDF)

    Flight
    Day 7
    Flight
    Day 8
    Flight
    Day 9
    Flight
    Day 10
    Flight
    Day 11
    Flight
    Day 12

    Original
    Flight Plan
    (37 Kb PDF)

    Original
    Flight Plan
    (35 Kb PDF)

    Original
    Flight Plan
    (37 Kb PDF)

    Original
    Flight Plan
    (31 Kb PDF)

    Original
    Flight Plan
    (42 Kb PDF)

    Ê

    The summary timeline for thi this mission is based on an original launch date of Jan. 16, 2002.

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