{"nhtsa_id":10033170,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2010-07-21","date":"2010-01-01","document_id":"SB-42-3","mfr_campaign":null,"replaces":null,"component":"SERVICE BRAKES, AIR","mfr_system":null,"summary":"FREIGHTLINER: AIR MANAGEMENT UNIT (AMU) REPLACEMENT. BEGINNING 4/10, SCHOOL BUSES EQUIPPED WITH AIR BRAKES OR HYDRAULIC BRAKES WITH AIR OPTIONS, WILL BE EQUIPPED WITH AN ACCESSORY AIR VALVE ASSEMBLY (AAVA). AAVA WILL TAKE THE PLACE OF THE CURRENT AIR MANAGEMENT UNIT (AMU) USED ON THE SCHOOL BUS CHASSIS. NO MODEL YEARS LISTED. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10033170","components":[{"id":"brakes","name":"Brakes","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"THOMAS BUILT BUSES","model":"SAF-T-LINER C2","year_from":2005,"year_to":2011,"match":null,"vehicle_ids":[]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}