India has been rocked by the crash of a Boeing 787 with 242 passengers on board today. The plane crashed shortly after takeoff on a flight to London.
One of the main points to clarify regarding the accident is the position from which the Boeing 787 initiated the takeoff maneuver.
Some pilots are wondering why the plane only used about 1,900 meters of runway to gain speed, and not more.
Numerous videos, including one that has been widely circulated online, show the difficulties the plane had in gaining a safe altitude over surrounding houses.
In fact, the pilots apparently failed to keep the plane in the air at a safe altitude and as a result the plane crashed.
The runway from which the Boeing 787 took off is runway 23 at Ahmedabad airport, with a total length of 3,505 meters.
According to flight tracking data, Air India Flight 171 took off from about halfway across the runway, using just 1,900 meters to reach the right speed for takeoff. But was that enough distance to reach the optimal altitude?
Several pilots contacted by Italian media express doubts about this short distance.
"Taking off with so little runway is only possible if proper calculations have been made for the weight and power of the engines at that point of departure. But an aircraft that has to fly from India to London with over 220 tons of weight, it seems that it needs more runway," said a flight commander.
Another points out that tensions between India and Pakistan force flights to avoid Pakistani airspace, thus increasing the distance and the need for more fuel.
Several other Air India 171 flights on the same route use a maneuver called "backtrack," where the plane departs from a more initial position on the runway to gain more distance.
Indian authorities are analyzing every aspect of the accident. However, the short runway usage does not appear to be a priority in the official investigation.
A major help in uncovering the causes is expected to come from analyzing the plane's black boxes. One records conversations in the cockpit and the other stores tens of thousands of technical flight parameters, which have not yet been found.