External Stowage Platform 2

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

image

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)

image

Download file here

STS-121

image

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

image

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.

image

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

image

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.

image

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

image

On Aug 2012, Exp.32 swapped the MBSU from FRAM-6 with a failed MBSU-1 from the SO truss.

image

On Jan 2013, the DEXTRE robot (SPDM) relocated ORUs between ESP-2 and ELC-2.

image

HTV-4

image

On Aug 2013, the HTV-4 carried the new MBSU-3 to be installed on ESP-2.

Top view:
FRAM 1 empty
FRAM 2 MBSU-2
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 MBSU-2
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 MBSU-2
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

This is the current configuration for ESP-2 as of this post. (April 2017)

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s