What is the policy regarding dispatching a revenue flight when the aircraft's pressurization system is inoperative?

What is the policy regarding dispatching a revenue flight when the aircraft's pressurization system is inoperative?

• A. Never
• B. Always with MEL
• C. Only if oxygen is provided
• D. Only domestic

Answer: (A)

Pressurization is essential to keep the cabin at a safe altitude during flight. If the pressurization system is inoperative, the aircraft cannot safely operate at normal cruise altitudes, exposing passengers and crew to hypoxia and other risks. Because of that safety requirement, a revenue flight is not dispatched with a known pressurization failure. The issue must be addressed and fixed before any revenue operation, usually by returning to maintenance or operating only as a non-revenue ferry if permitted by maintenance control. Relying on oxygen alone does not resolve the safety problem, and the restriction applies regardless of route (domestic or international).

Pressurization is essential to keep the cabin at a safe altitude during flight. If the pressurization system is inoperative, the aircraft cannot safely operate at normal cruise altitudes, exposing passengers and crew to hypoxia and other risks. Because of that safety requirement, a revenue flight is not dispatched with a known pressurization failure. The issue must be addressed and fixed before any revenue operation, usually by returning to maintenance or operating only as a non-revenue ferry if permitted by maintenance control. Relying on oxygen alone does not resolve the safety problem, and the restriction applies regardless of route (domestic or international).