After investigation of the onboard electrical fire on ZA002, earlier this month, Boeing now is in need to make changes to its 787 design. Boeing is developing design changes to power distribution panels on the 787 and updates to the systems software that manages and protects power distribution on the airplane.
Engineers have determined that the fault began as either a short circuit or an electrical arc in the P100 power distribution panel, most likely caused by the presence of foreign debris. The design changes will improve the protection within the panel. Software changes also will be implemented to further improve fault protection.
The P100 panel is one of five major power distribution panels on the 787. It receives power from the left engine and distributes it to an array of systems.
A revised 787 program schedule is expected in a few weeks.