The ill-fated New York City tour helicopter that ... had identified a risk of tail rotor drive (TRDS) failure caused by a faulty bonded joint in the segmented drive shaft. The FAA recommended ...

50 caliber machine guns Load: 37 troops or 24 litter patients plus four attendants or 8,000 pounds The CH-53D Sea Stallion is a medium lift helicopter ... main rotor and four-bladed tail rotor ...

Divers have salvaged key new evidence following the horrific helicopter ... rotor blades. In the event of an emergency, whereby the engine shuts down, “most helicopters drive the tail rotor ...