
Collision in Washington: Discrepancies in flight altitudes
Last Wednesday evening, a dramatic aircraft collision occurred in the US capital Washington DC, resulting in the worst aviation accident in the United States in more than 20 years. During a botched landing approach to Ronald Reagan Airport (DCA), an American Airlines passenger plane and a UH-60 military helicopter collided. Both planes crashed, killing a total of 67 people - 60 passengers and 4 crew members of the American Airlines plane, and 3 crew members of the helicopter. Investigations into the cause of the collision are currently in full swing. A particularly critical point in the investigation is a discrepancy in the altitude information provided by the two aircraft involved. According to the data from the flight recorder, the American Airlines passenger plane was at an altitude of 325 feet (about 99 meters) at the time of the collision, with a tolerance of plus or minus 25 feet (about 7,6 meters). In contrast, the control tower stated that the military helicopter was flying at an altitude of only 200 feet (approx. 61 meters). The exact reason for these different altitude readings is currently unclear, and investigators are working hard to investigate this discrepancy. The US accident investigation authority NTSB (National Transportation Safety Board) stated that the data is still preliminary and that this is an early stage of the investigation. The recovery of data from the military helicopter's flight recorder, which was damaged by water ingress, also presents additional challenges for investigators. Todd Inman, a spokesman for the NTSB, emphasized that there were differing opinions within the team as to whether the discrepancy in the published altitudes