Reconfigure power on channels 1 and 4 of the station's electrical system

Completing the activation of the lab complex's permanent ammonia cooling system. They made several of electrical and fluid line connections to tie the heat exchangers into coolant loop A.

Reconfiguring the second of two cooling loops for the Destiny module, securing the aft radiator of the P6 truss after retraction and preparing the obsolete Early Ammonia Servicer for removal this summer.

Removing shrouds, which provide thermal shading and which are larger than king-size bed sheets; they also made groundwork for attachment of a cargo carrier and preparing work for the relocation of the P6 Truss

The astronauts replaced a faulty power routing unit (partly failed') on the station's truss and run cables for an upcoming Russian laboratory module.

The astronauts completed the installation of a spare power unit on the station's truss.

The astronauts repaired an ammonia leak on one of the station's port-side radiators.

They replaced a rate gyro assembly, a planar reflector on IDA-3 and did fit checks ahead of the AMS-2 upgrades.

They removed a radio frequency group antenna assembly from the station's truss, collected samples of surface material for analysis from the Destiny laboratory and the Quest airlock , and prepared a spare elbow joint for the Canadarm2