What is the condition for opening doors on the aircraft if provisioning is not taking place?

In the context of cabin safety and operations, the correct understanding of opening doors when provisioning is not taking place is that both doors at the back and the "C" doors must be cracked after disarming. This procedure is crucial for ensuring the safety of both the passengers and the flight attendants.

When the aircraft is not being provisioned, the doors can be cracked to provide ventilation and allow crew members to assess the loading process and engage with passengers while still maintaining safety protocols. Cracking both the rear doors and the "C" doors ensures that there is controlled access to the cabin, while still adhering to safety guidelines regarding the aircraft's readiness for boarding or deplaning.

This protocol helps to establish a safe environment for operations on the ground, allowing crew members to manage any situations that may arise, while ensuring that all safety measures are fully observed during the door operation process.