What was found
CLE - FLT 3176 - CREW REPORTED THAT DURING THE BEFORE ENGINE START CHECK LIST THE CAIBN PRESSURE BUMPED UP AND DOWN ASSOCIATED WITH A LOUD SQUEAL FROM THE RIGHT PACK, AND THEN THE CABIN FILLED WITH SMOKE. MAINTENANCE REMOVED AND REPLACED A HOSE ON THE RIGHT PACK IAW SB 120-210048, OPERATIONAL CHECKS WERE SATISFACTORY IAW EMB-120 MM 21-50-00 AND 21-60-00. AIRCRAFT RELEASED FOR SERVICE. (M)