Final answer:
Abnormal alternate law is a flight control mode where certain protections and functions of the normal control law are lost or degraded. This mode provides limited control to the pilot, and the airplane's behavior may differ from the usual response. It can occur when there is a failure or loss of certain critical systems or when the aircraft is operating outside its normal flight envelope.
Step-by-step explanation:
Flight control laws determine how an airplane's flight controls respond to input from the pilot. These laws are designed to ensure safe and stable flight. In normal law, the flight controls provide the expected response based on the pilot's input. However, in certain situations, such as when there is a fault in the aircraft's systems or when the plane is operating outside its normal flight envelope, the airplane may enter abnormal alternate law.
Abnormal alternate law is a flight control mode where certain protections and functions of the normal control law are lost or degraded. This mode provides limited control to the pilot, and the airplane's behavior may differ from the usual response. The specific conditions under which the airplane enters abnormal alternate law can vary depending on the aircraft manufacturer and model, but it generally occurs when there is a failure or loss of certain critical systems or when the aircraft is operating outside its normal flight envelope.
For example, if there is a fault in the aircraft's flight control computers, the airplane may transition from normal law to abnormal alternate law. This could result in reduced stability or control authority, requiring the pilot to apply different techniques to fly the aircraft safely. The transition to abnormal alternate law is usually indicated by warning lights or messages in the cockpit, and the pilot must follow specific procedures outlined in the aircraft's operating manual to manage the situation.