It was decided to use the second production aircraft, RC503, to conduct the non-instrumented or minimally-instrumented tests, such as HIRF and Water Spray Certifications.
Decidiuse usar o segundo exemplar de produción, o RC503, para levar a cabo os voos sen instrumentos ou cos mínimos instrumentos precisos, así como as probas HIRF (campos de radiación de alta intensidade) e as certificacións de auga rociada.