Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
SM1601
Service Bulletin/Repair Instructions
Blue Bird Troubleshooting Guides: Blue Bird announcement of the addition of troubleshooting guides for assisting in the service of the Blue Bird products. These troubleshooting guides are available on the Vantage website.
S01EP
Service Bulletin/Repair Instructions
SUBJECT BUSES MAY HAVE HAD CONCERNS REGARDING FUSES BLOWING FREQUENTLY IN THE FRONT HEATER CIRCUIT. *TT
S98BT98
Service Bulletin/Repair Instructions
VEHICLE EXPERIENCING TURBO PIPE BREAKING AT TOP FLANGE. *YC