{"nhtsa_id":10050539,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2013-02-04","date":"2012-10-19","document_id":"SB-T-1277","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"CUMMINS: IN THE EVENT OF ENGINE BRAKE HARNESS FAILURE, DRILLING/TAPPING AND INSTALLATION OF P CLIP TO CYLINDER HEAD, IS BEING ALLOWED, DUE TO DAMAGE, CAUSED BY CONTACT OF ROCKER LEVERS, DURING OPERATION OF ENGINE. MODELS ISX, QSX15ISX15, CM570, SIGNATURE, ISX CM870, CM871, ISM, ISME, QSM11 CM570. NO MODEL YEARS LISTED. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10050539","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CUMMINS","model":"CUMMINS","year_from":null,"year_to":null,"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":[]}