What are bank angle protections in Normal Law and how do they influence stall avoidance?

• A. Bank angle protection limits bank to approximately 33 degrees; helps maintain safe attitude and stall margins; degrades with system faults.
• B. Bank angle protection limits bank to approximately 40 degrees.
• C. Bank angle protection is not present in Normal Law.
• D. Bank angle protection locks the aircraft at 0 degrees bank.

Answer: (A)

Bank angle protection in Normal Law is there to keep the airplane from rolling into a steep turn that could compromise safe handling and stall margins. It caps the bank angle at about 33 degrees, so the aircraft won’t exceed a bank that would demand excessive lift and could push you toward a stall, especially when you’re near the limits of the flight envelope. The protection works by limiting the roll command from the flight control system, helping you maintain a safe attitude and recover more easily if you’re near stalls in a turn.

This protection isn’t absolute: if the flight control system has faults, the limiter can degrade or disappear, allowing a larger bank or removing the safeguard altogether. That degradation can increase stall risk in unusual attitudes or during maneuvering. While stall avoidance is mainly driven by angle-of-attack protection, keeping the bank to a modest value supports maintaining adequate stall margins during turns.

Other options don’t fit because the limit is not 40 degrees, bank protection does exist in Normal Law, and it doesn’t lock the airplane at zero bank.