The aircraft made 12,858 flights and flew for 18,634 hours since new.
"Earlier this month we flew for two hours in a helicopter to one place and didn't see a single house on the way."
The helicopters fly for only a few hours at a time, often more than once during each day of light.
He flew continuously for 25 hours and 10 minutes, a record that stood until 1939.
After flying for many hours, we finally got off the airplane.
At the time of the accident, the aircraft had flown for 3,898 hours.
Both helicopters fly for 10 hours a day, 7 days a week.
By then it had flown for more than 10 hours.
This test bed was lost during an accident in 2000, after having flown for 215 hours.
At the time of the accident it had flown for 52,613 hours.