31.   During the final spacewalk, astronauts also plan to replace the failed cooling system on a second Hubble camera.

32.   Earlier this week, cosmonauts Tsibliev and Lazutkin patched small but worrisome leaks in the Mir cooling system, which has a history of problems.

33.   During the fifth spacewalk, the team will finish installing the cooling system, which requires hooking up several circulator loops and numerous other connections to the infrared instrument.

34.   Engineers then suspected the cooling system had iced up.

35.   Engineers believe an air bubble trapped in the water line of its cooling system is causing a circulation pump to run too fast, tripping an automatic shutdown mechanism.

36.   Guest American astronaut Jerry Linenger and his two cosmonaut hosts will use the tools to try and repair a leaky cooling system and a device that generates breathing oxygen.

37.   Gunthardt owns a sophisticated cooling system for storing dairy products.

38.   He also vowed to order Muni to put a maintenance plan in place that would install engines and cooling systems on the most troubled and heavily used Muni lines.

39.   He said other studies showed almost no loss of sea life in the cooling system.

40.   He noted that the freon cooling system was just one of several options available to maintain temperature balance on the shuttle during re-entry.