Both the forward and aft Cargo Compartments are divided into three fire detection zones. Two smoke detector fans in each compartment draw air through the smoke detectors. If smoke is detected in any zone, a fire warning occurs. If detection within a zone falls, the remaining zones can provide a fire warning. Any failure which results in loss of detection within a compartment causes an EICAS advisory message to display.

The engines can be started using the autostart system or manually. Bleed air powers the starter motor which is connected to the N₂ rotor. The starter air bleed source is normally the APU, but air from ground carts or another running engine can be used. Each Engine has two ignitors. The Electronic Engine Control (EEC) alternates ignitors for successive engine ground starts. Both ignitors are always used for in-flight starts.