ESP-2 was the payload aboard Space Shuttle Discovery STS-114 mission launched on Jul 26, 2005. It is much larger than ESP-1 with eight FRAM sites for eight spare parts (ORUs). ESP-2 is attached to the Quest Airlock.
STS-114
Original configuration (top view)
FRAM 1 empty
FRAM 2 Video Stanchion Support Assembly (VSSA)
FRAM 3 empty
FRAM 4 Main Bus Switching Unit (MBSU)
Original configuration (bottom view)
FRAM 5 empty
FRAM 6 empty
FRAM 7 Flex Hose Rotary Coupler (FHRC-3)
FRAM 8 Utility Transfer Assembly (UTA)
Download file here
STS-121
Top view:
FRAM 1 Pump Module
FRAM 2 Video Stanchion Support Assembly (VSSA)
FRAM 3 empty
FRAM 4 Main Bus Switching Unit (MBSU)
Bottom view no changes
STS-121 was launched on July 4, 2006. The PM was installed on ESP-2 during STS-121.
Download file here
On July 23, 2007, the VSSA from FRAM-2 was jettisoned overboard.
Top view:
FRAM 1 Pump Module
FRAM 2 empty
FRAM 3 empty
FRAM 4 Main Bus Switching Unit (MBSU)
During mission STS-118 On Aug 13, 2007, a failed Control Moment Gyroscope from Z1 truss was installed on FRAM-5.
Bottom view:
FRAM 5 failed Control Movement Gyroscope (CMG) from Z1
FRAM 6 empty
FRAM 7 Flex Hose Rotary Coupler (FHRC-3)
FRAM 8 Utility Transfer Assembly (UTA)
Download file here
STS-120
Bottom view:
FRAM 5 failed Control Movement Gyroscope (CMG) from Z1
FRAM 6 Main Bus Switching Unit (MBSU)
FRAM 7 Flex Hose Rotary Coupler (FHRC-3)
FRAM 8 Utility Transfer Assembly (UTA)
Download file here
The failed CMG from FRAM 5 was returned to Earth by STS-122 and was mounted on an ICC-Lite payload rack in the cargo bay.
Bottom view:
FRAM 5 empty
FRAM 6 Main Bus Switching Unit (MBSU)
FRAM 7 Flex Hose Rotary Coupler (FHRC-3)
FRAM 8 Utility Transfer Assembly (UTA)
STS-123
Top view:
FRAM 1 Pump Module
FRAM 2 DCSU
FRAM 3 DCSU
FRAM 4 MBSU
Bottom view:
FRAM 5 Pitch/Roll Joint
FRAM 6 MBSU
FRAM 7 FHRC-3
FRAM 8 UTA
Download file here
During an EVA on STS-129 mission (Nov 2009), the Airlock module shields were packed behind the Pump Module.
The Airlock meteoroid shields were removed during an EVA and returned to Earth aboard STS-131.
Pump Module (PM) (SN0004), initially installed on FRAM-1 during STS-121, was removed on August 17, 2010 by the Exp.24 crew and installed on S1 Truss, replacing the original (failed) PM SN0002. The failed unit had been temporarily stored on an ORU site on the MBS, then moved to ESP-2 by the STS-133 crew.
The failed Pump Module was returned to Earth by STS-135 on July 13, 2011.
Top view:
FRAM 1 Empty
FRAM 2 DCSU
FRAM 3 DCSU
FRAM 4 MBSU
On Aug 2012, Exp.32 swapped the MBSU from FRAM-4 with a failed MBSU-1 from the SO truss.
Top view:
FRAM 1 Empty
FRAM 2 DCSU
FRAM 3 DCSU
FRAM 4 failed MBSU
On Jan 2013, the DEXTRE robot (SPDM) relocated ORUs between ESP-2 and ELC-2.
Top view:
FRAM 1 Empty
FRAM 2 DCSU
FRAM 3 CTC-1
FRAM 4 empty
HTV-4
On Aug 2013, the HTV-4 carried the new MBSU-3 to be installed on ESP-2.
Top view:
FRAM 1 empty
FRAM 2 DCSU
FRAM 3 CTC-1
FRAM 4 MBSU-3
Download file here
Exp.41 (EVA-27)
On Oct 2014, another failed Pump Module that was temporarily stored on the MBS POA for 9 months, was transferred to ESP-2 during this EVA.
Top view:
FRAM 1 failed PM
FRAM 2 DCSU
FRAM 3 CTC-1
FRAM 4 MBSU-3
Bottom view:
FRAM 5 Pitch/Roll Joint
FRAM 6 MBSU
FRAM 7 FHRC-3
FRAM 8 UTA
Click here for related post and download file
On April 25, 2017, the MBSU-2 on S0 truss failed.
DEXTRE swapped the failed MBSU-2 unit with the new MBSU-3 from ESP-2.
Top view:
FRAM 1 failed PM
FRAM 2 DCSU
FRAM 3 CTC-1
FRAM 4 failed MBSU-2
Bottom view:
FRAM 5 Pitch/Roll Joint
FRAM 6 MBSU
FRAM 7 FHRC-3
FRAM 8 UTA
On Aug 8, 9 and 10th, 2017 the failed MBSU from FRAM 4 was installed via robotics on the Japanese Airlock for internal repairs.
Top view:
FRAM 1 failed PM
FRAM 2 DCSU
FRAM 3 CTC-1
FRAM 4 empty MBSU FRAM
On Nov 6, 2017, the recently repaired spare MBSU was transferred from the Japanese Experiment Module Airlock and installed on ESP-2 empty MBSU FRAM.
Top view:
FRAM 1 failed PM
FRAM 2 DCSU
FRAM 3 CTC-1
FRAM 4 MBSU (repaired)
LEE/UTA swap
On Nov 15, 2017, the SSRMS and Dextre moved the UTA from ESP-2 to ELC-1, and moved the LEE from ELC-1 to ESP-2, in preparation for US EVA-47.
Bottom view:
FRAM 5 Pitch/Roll Joint
FRAM 6 MBSU
FRAM 7 FHRC-3
FRAM 8 LEE
On Jan 10, 2018 the Dextre robot moved the spare Yaw Joint unit (Pitch/Roll) from ESP-2 FRAM 5 to the EOTP as part of preparation for more work on the Canadarm 2.
Bottom view:
FRAM 5 empty
FRAM 6 MBSU
FRAM 7 FHRC-3
FRAM 8 LEE
Special thanks to Olaf, NASASpaceflight forum member, for making corrections with the MBSU’s.
US EVA-47 and US EVA-48
US EVA-47 on Jan 23, 2018
US EVA-48 on Feb 16, 2018
Bottom view:
FRAM 5 empty
FRAM 6 MBSU
FRAM 7 FHRC-3
FRAM 8 Empty FRAM
On Feb 20, 2018, the SSRMS and Dextre transferred the spare Yaw Joint unit (Pitch/Roll) from the EOTP back to ESP-2 Site 5.
Bottom view:
FRAM 5 Pitch/Roll Joint
FRAM 6 MBSU
FRAM 7 FHRC-3
FRAM 8 Empty FRAM
CRS-15
Dragon cargo CRS-15 arrived at the ISS bringing payloads ECOSTRESS and LEE.
Top view:
FRAM 1 failed PM
FRAM 2 DCSU
FRAM 3 CTC-1
FRAM 4 MBSU (repaired)
Bottom view:
FRAM 5 Pitch/Roll Joint
FRAM 6 MBSU
FRAM 7 FHRC-3
FRAM 8 LEE
This is the current configuration for ESP-2 as of April 12, 2021
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