What is the consequence of having an unserviceable battery installed and connected?

Having an unserviceable battery installed and connected can lead to a total deactivation of fire fighting capabilities at the nose wheel well Fire Suppression System (FSS) control panel. The critical role of the battery in the functioning of the APU and related systems means that if the battery cannot supply adequate power, essential safety features, such as fire suppression systems, could fail to operate effectively.

The fire fighting capabilities rely on the electrical systems being operational, and a faulty battery can disrupt that power supply. This highlights the importance of ensuring that the battery is in good condition to maintain the functionality of critical safety systems in the aircraft. Maintaining an operational battery is thus vital for emergency responses and overall safety during ground operations.