How was a thin strip of nylon or polyester webbing stretched between two points to blame in the January crash that killed ...

The people who strung the line - which is used in a sport akin to tightrope walking - had filed an aviation safety notice, raising questions about the air alert system.

Shortly after the crash, another helicopter flew near the slackline, the National Transportation Safety Board investigation ...

A preliminary report reveals the helicopter hit a slackline, a type of webbing, that was stretched across Telegraph Canyon.

The NTSB released on Wednesday its preliminary report into the helicopter’s collision with a slackline, including new ...

This article originally published at Helicopter crashes into kilometer-long slackline in Arizona, killing four.

Slackline warning was issued before helicopter crash that killed groom and nieces on wedding day - The pilot was taking his nieces on a helicopter ride before his wedding ceremony, family said ...

Investigators say a helicopter hit a highline stretched across Telegraph Canyon near Superior, killing four. Here’s what to know.

Federal investigators are examining if a slackline was properly authorized following the deadly helicopter crash near Superior that claimed the lives of four people on Friday, ...

A fatal Arizona helicopter crash involving a high-altitude slackline has renewed scrutiny of the FAA’s NOTAM system ahead of its planned upgrade.

Federal aviation records show a notice was issued to pilots that a tightrope would be stretched across a mountainous area of Arizona, providing a warning to watch out for the temporary obstacle.