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.
Letter to dealer
Service Bulletin/Repair Instructions
This was a letter to our dealers we sent out when we first heard of the Kidde fire extinguisher recall, even though it was still unofficial. We knew our coaches on the dealers' lots contained Kidde and could not be sold unreplaced.
SB-41
Service Bulletin/Repair Instructions
TIFFIN MOTORHOMES: TSB CONTAINS NOTIFICATION OF OWNER LETTER. SELECT DOCUMENT SEARCH BUTTON BELOW. THE PROCEDURE TO SEAL UNDER THE F-TRIM ON ALL ALLEGROS. *JS UPDATED 6/29/15. *TA
SB-37
Service Bulletin/Repair Instructions
TIFFIN MOTORHOMES: SEE DOCUMENT SEARCH BUTTON FOR OWNERS LETTER. NEED ALLEGRO CIRCUIT BREAKER UPGRADE TO PREVENT NUISANCE. *LJ
SB-36
Service Bulletin/Repair Instructions
TIFFIN MOTORHOMES INC. : SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. TWENTY UNIT HAS TWO MISSING SCREWS OFF THE AIR CONDITIONER. THE SCREWS WILL BE ENCLOSED TO MAKE REPAIRS. *LJ