PSA Airlines Canadair Regional Jet Systems (PSA-CRJ) Practice Exam

What happens to the thrust if APR is activated during engine failure on takeoff?

1. Thrust is decreased

2. Thrust remains unchanged

3. Maximum thrust is commanded

4. Thrust is increased to climb

The correct answer is: Maximum thrust is commanded

When APR, or Automatic Performance Reserve, is activated during engine failure on takeoff, the system commands maximum thrust from the operating engine. This feature is designed to enhance the aircraft's performance and ensure that adequate thrust is available for a safe climb away from the runway, especially in critical situations like engine failure shortly after takeoff. APR is particularly crucial for regional jets like the Canadair Regional Jet, as it helps maintain control and performance during the takeoff phase when achieving sufficient airspeed and altitude is essential. By providing maximum thrust, the system assists pilots in managing the adverse effects of engine failure, allowing them to maintain a safe climb gradient and manage their flight path effectively until they can stabilize the aircraft or return safely.