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In a big relief to Hindustan Aeronautics Limited, pilot error was found to have caused the crash of the India-made Advance Light Helicopter 'Dhruv' in Ecuador in October, a probe conducted in the United States and India into the mishap has revealed.
The crash, during a military parade on October 28 in the South American country, injuring two pilots, was considered a major setback to India's efforts to market its indigenous helicopters overseas.
The Ecuadorian Air Force, which bought five Dhruvs from the Bangalore-headquartered HAL, had grounded the entire fleet till the probe was completed.
However, the probe findings have come as a big relief for HAL, which has identified South America as one of the key export markets for Dhruv. The probe revealed that 'over-manoeuvre of the pilot' led to the crash.
"The pilot had taken a very deep left turn. Because he took the left turn, he went down in height and didn't have sufficient time to recover and hit the ground," a senior HAL official said.
An Ecuadorian investigation team was at HAL last week, armed with an independent probe -- conducted with the help of the flight data recorder and cockpit voice recorder -- that it had carried out in Washington.
"They had gone to the US and conducted a neutral investigation there. They didn't tell us the results. They came here and we did the probe. Then they (Ecuadorean team) told us whatever they did in Washington exactly matches the results that they got here," the official said.
HAL can't make the probe results public because it has a non-disclosure agreement with the Ecuadorian Air Force, he said.