Working smoke detectors would have been useful given the battery fires that the 787 experienced: * https://en.wikipedia.org/wiki/2013_Boeing_787_Dreamliner_gro

Working smoke detectors would have been useful given the battery fires that the 787 experienced: * https://en.wikipedia.org/wiki/2013_Boeing_787_Dreamliner_grounding https://en.wikipedia.org/wiki/2013_Boeing_787_Dreamliner_gro...