HOW TO CHANGE T.O DATA OR DEPARTURE RUNWAY AFTER REJECTED TAKEOFF (DSC-22_2085 P ½)

Title: Managing Departure Changes After a Rejected Takeoff: A Step-by-Step Guide for Airbus Pilots

 

Introduction

As professional pilots operating Airbus aircraft, we are well aware of the meticulous planning and precise execution required during each phase of flight. One critical aspect is the departure phase, where accurate takeoff data and runway information are essential. However, unforeseen circumstances, such as a rejected takeoff, may necessitate a change in the Flight Management System (FMS) departure data or departure runway. In this article, we will explore the detailed procedure for making such changes, as outlined in the Airbus documentation (DSC-22_20-85 P ½).

 

Rejected Takeoff and FMS Limitations

In the event of a rejected takeoff, particularly with an aircraft speed exceeding 90 knots or with ample thrust available, the FMS remains locked in the TAKEOFF phase. This restriction poses a challenge for the flight crew as they are unable to modify the FMS departure Takeoff (T.O) data or departure runway in the active flight plan.

 

Operational Recommendation

To address this limitation and facilitate a smooth transition in the event of a rejected takeoff requiring changes to the FMS T.O data or departure runway, the following operational recommendation should be followed:

1. Delete the SEC F-PLN:
   After a rejected takeoff, the first step is to delete the Secondary Flight Plan (SEC F-PLN) from the FMS. This can be accomplished through the FMS interface, adhering to standard operating procedures.
2. Initialize the SEC F-PLN with the new T.O DATA and/or new departure runway:
   Once the SEC F-PLN is deleted, the flight crew should initiate the process of initializing a new SEC F-PLN with the updated takeoff data and/or the revised departure runway. This involves entering the relevant information into the FMS, ensuring accuracy and compliance with the revised departure plan.
3. Activate the SEC F-PLN:
   Upon successful initialization of the new SEC F-PLN, the final step is to activate it. Activating the Secondary Flight Plan ensures that the updated takeoff data and departure runway are incorporated into the active flight plan, allowing for a seamless transition to the modified departure procedure.

Conclusion

In the dynamic environment of aviation, being prepared for unexpected events is crucial for the safety and efficiency of flight operations. The outlined procedure for changing FMS T.O data or departure runway after a rejected takeoff provides Airbus pilots with a structured and systematic approach to handle such scenarios. By following these steps, flight crews can effectively adapt to changing circumstances and ensure a safe continuation of the flight.