An air turnback refers to a situation where an aircraft returns to its departure airport without prior planning. The primary reason for this occurrence is usually an emergency or an abnormal situation shortly after take-off, with engine failure being the most common issue. If a problem arises during acceleration, the crew may try to abort the takeoff, depending on the speed and nature of the emergency. In some cases, it might be safer to become airborne and then land back at the airport. However, this could lead to complications if the aircraft’s weight exceeds its certified maximum landing weight (MLW).
When faced with a turnback situation, the crew has three main options. The first is to make an overweight landing. In emergencies, the pilot in command can deviate from standard procedures for safety reasons. This means they might choose to land even if the aircraft is heavier than the MLW, considering it the safest choice. However, this type of landing can be challenging, requiring a longer runway and increasing the risk of a runway excursion. A post-landing inspection will also be necessary.
The second option is to burn off excess fuel, often by entering a holding pattern. This is a safe method, but if the aircraft becomes unairworthy before reaching the safe weight, or if there’s another urgent issue, the crew will need to decide on a different course of action. The third option is to dump fuel, but this isn’t available for all aircraft types, and some may lack the necessary systems. There are also restrictions, such as needing to reach a designated area for dumping fuel.
Air turnbacks can occur at any flight phase—during climb, cruise, or even near the destination when landing is not possible due to weather. Issues arising during the climb phase typically lead to a turnback since the departure airport is nearby. During cruise, if an engine fails or another emergency arises, the flight crew evaluates the situation and decides on the best course of action. Depending on factors like severity, available fuel, company policy, and weather conditions, they may choose to continue to the destination, divert to an alternate airport, land at the nearest suitable airport, or return to the departure point.
Several notable incidents illustrate air turnbacks. On May 11, 1996, a DC9-30 faced control issues due to a fire from improperly loaded oxygen generators, leading to a turnback. In another case on June 21, 2017, an Airbus A320 experienced engine vibration after a bird strike during takeoff in Delhi, which resulted in an eventual turnback. A UPS Boeing 747-400 encountered a main deck cargo fire shortly after takeoff from Dubai on September 3, 2010, prompting a turnback but ultimately leading to a loss of control due to fire damage.
Each of these incidents emphasizes the importance of proper procedures and safety measures in aviation. Whether due to mechanical failure or other emergencies, understanding air turnbacks helps improve overall safety in the skies.
