Trolley bus circuit breaker fires

What NHTSA is examining

In a July 7, 2020 letter, Los Angeles World Airports (LAWA) informed the National Highway Traffic Safety Administration (NHTSA) of three separate fire incidents resulting in the total loss of eight of its Spirit of America trolley buses. These buses were manufactured by ARBOC Specialty Vehicles, LLC (Arboc) on incomplete chassis from Freightliner Custom Chassis Corporation. Considering the safety concerns and substantial losses, LAWA grounded the remaining buses in its fleet. OnJanuary 15, 2021, NHTSA opened an investigation to determine if a defect in the subject vehicles exists and presents an unreasonable risk to vehicle occupants and nearby people or property. On February 24, 2021, the Office of Defects Investigation (ODI) sent an Information Request (IR) letter to Arboc. On April 8, 2021, ODI received an IR response from Arboc that included information on vehicle production, consumer complaints, field reports, warranty claims, manufacturer actions, vehicle changes and other data related to the alleged defect. On June 29, 2021, Arboc sent NHTSA a copy of an investigation report/update (Investigations into LAWA Thermal Events) done by a third-party investigation firm (hired by the chassis manufacturer) that included an assessment of the alleged defect/fires. ODI also engaged in discussions with the manufacturer about the alleged defect on multiple occasions during this investigation. Upon analysis of available data, ODI has not determined the existence of a safety defect…

Vehicles under investigation