Selv de minste gjenstander kan føre til havari

Franskmennenes såkalte fenestron hvor halerotoren er spesielt godt beskyttet, er en god løsning. Den beste løsningen har naturligvis MD-serien som kalles NOTAR, eller No Tail Rotor. Sjekk denne:

A 2010 helicopter crash in a small Idaho town that killed two state wildlife biologists and the pilot was caused when an aluminum clipboard belonging to one of the biologists somehow fell out of the aircraft and hit the tail rotor, the National Transportation Safety Board said.

A report released Thursday said it's unclear if the clipboard came from an external luggage rack or from inside the cabin.

The Hiller UH-12E helicopter had a three-abreast bench seat that had the pilot in the center. Its cabin was fully enclosed, but officials said occupants sometimes open the doors during flight.