Procedure:	Collision between NTT and Building
	Keywords:	Recovery - NTT Azimuth - bulding - collision
	Prepared/Revised:	1998-07-28 pgitton	Reviewed:	?	Released:	?

Summary

Physical collision between the NTT fork and the building can happen.

This can be easily confirmed by entering the telescope base room next to the old control room: the telescope is touching the building (some safety pads have been installed to prevent any damage when this happens).

This procedure explains how to recover from such collision

Procedure

• Ignore the bu and az modules on the NTT status panel
• Press "STOP TCS" button on TCS main panel
• Then you can go in the telescope room and open the "Azimuth Power Rack". There turn the button labelled "Override" to free the building You can move the building so that it does not touch anymore the telescope
• Then remove the ignore flags for both bu and az modules and press "START TCS" on the TCS main panel.