The Avro RJX passed a major milestone on 18 March when it began engine runs. The tests began with the number four Honeywell AS977 fitted to the first RJX-85, G-ORJX. The engine was started up twice, and run through a pre-planned series of tests. In the following two days, the tests were repeated on each of the other three engines in turn. The fire extinguisher systems were also tested. All tests were completed successfully. Taxi trials are now expected to begin in early April, and then be followed by the long-awaited first flight.