A national safety board has issued a rare, urgent warning over the risk of Boeing 737 Max engines malfunctioning and letting smoke into an airplane cabin or cockpit.

The National Transportation Safety Board warned that certain CFM engines installed in some Boeing 737 Max jets may feed smoke into the cockpit or cabin after a bird strike.

No extra engines had been placed in the Palisades, where the fire broke out about 10:30 a.m. on Jan. 7, officials said. The department pre-positioned nine engines to the San Fernando Valley and ...