How many PBEs are on the CRJ 200 aircraft?

The correct answer indicates that there is one Portable Breathing Equipment (PBE) unit on the CRJ 200 aircraft. PBEs are critical safety equipment, specifically designed to provide cabin crew members with a supply of oxygen in case of smoke or fire emergencies, ensuring they can manage such situations effectively and maintain a higher level of safety for all onboard.

In aircraft design, safety regulations often dictate that a specific number of such devices be present based on the size and capacity of the aircraft. The CRJ 200, being a regional jet, is engineered to optimize space and weight while still meeting all necessary safety standards. Therefore, having just one PBE on this aircraft model is sufficient for the operational requirements and emergency protocols, as the crew can utilize it in emergencies while still being able to share it if necessary.

The presence of two, three, or none would exceed or fail to meet aircraft safety regulations, which are carefully crafted to balance crew resources with safety needs in a practical manner.