This is a sources sought notice for market research to identify potential contractors capable of repairing a failed motor-generator set for a NIST wind tunnel in Building 230. The work involves rigging the generator out for transport, performing comprehensive repairs including replacing obsolete brush boxes and bearings, and then reinstalling and aligning it on-site. The estimated value of the equipment is $500,000. The purpose is to restore the wind tunnel's power system to full operational specifications.