These rules set conditions, such as weather, under which the aircraft may operate.

The aircraft was operating a test flight, all four crew were killed.

The aircraft was operating a cargo flight, both crew were killed.

As a result, only rotary aircraft operated from the base.

The aircraft was operating a cargo flight, all three people on board survived.

The aircraft had operated 16,934 hours and 32,347 cycles prior to its last flight.

The same aircraft had operated the inaugural 747 commercial flight on January 22, 1970.

His two-engine aircraft was now operating on one of its engines at 80 percent power.

The aircraft was operating a test flight as Flight 517.

This aircraft operated as a seaplane until 1958 and was obtained in 1971.