{"nhtsa_id":11029074,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-02-27","date":"2026-02-27","document_id":"S26DZ","mfr_campaign":"S26DZ","replaces":null,"component":"SERVICE BRAKES","mfr_system":null,"summary":"The mechanical brake switch & bracket design has a potential for cumulative at-limit stack up clearances to exceed the limitations of the mechanical switch. As a result, a preventative maintenance adjustment procedure is necessary and, at times, settings can be difficult to achieve.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029074-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029074-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11029074","components":[{"id":"brakes","name":"Brakes","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"BLUE BIRD","model":"VISION SCHOOL BUS","year_from":2020,"year_to":2026,"match":null,"vehicle_ids":[]},{"make":"BLUE BIRD","model":"VISION TRANSIT BUS","year_from":2020,"year_to":2026,"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":[]}