A new airworthiness directive for the MD Helicopters MD500N, MD600N and MD900 requires determining the cure date for each Notar fan blade tension-torsion strap (T-T strap). The light at the end of ...

The aerial saw is attached to an MD 500 helicopter to trim back trees for power lines, pipelines, railroads, and governmental agencies. "Aerial side trimming provides maximum lateral clearances ...