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Forum: Rotorheads

7th Dec 2022, 14:36

Replies: 23

Bell 407 in-flight tail boom separation

Views: 5,847

Posted By wrench1

Sure. Without knowing the failure sequence...

Sure. Without knowing the failure sequence anything is possible with the bolts and ring. For example, why didn’t the upper RH bolt stretch as well? But if there was any bolt stretching I would think...

Forum: Rotorheads

6th Dec 2022, 21:44

Replies: 23

Bell 407 in-flight tail boom separation

Views: 5,847

Posted By wrench1

As mentioned, in the Public Docket linked here...

As mentioned, in the Public Docket linked here below. I believe it was in line item 2 report.
https://data.ntsb.gov/Docket?ProjectID=105233

Doubtful. The fuselage side longeron fittings failed...

Forum: Rotorheads

5th Dec 2022, 19:55

Replies: 23

Bell 407 in-flight tail boom separation

Views: 5,847

Posted By wrench1

And just the opposite they put a weight on the...

And just the opposite they put a weight on the 407 tail skid to dampen vibrations. I always found it interesting that one could purposely move around vibrations within the airframe especially those...

Forum: Rotorheads

5th Dec 2022, 15:35

Replies: 23

Bell 407 in-flight tail boom separation

Views: 5,847

Posted By wrench1

Probably this scenario as they did not locate the...

Probably this scenario as they did not locate the bolt, nut, or washers. The docket gives more details and pics. Given the airframe tailboom ring is pulled forward and the upper L/H hardware missing,...

Forum: Rotorheads

4th Dec 2022, 23:48

Replies: 23

Bell 407 in-flight tail boom separation

Views: 5,847

Posted By wrench1

The weak link on most Bell helicopters has been...

The weak link on most Bell helicopters has been the tailboom. The proverbial Achilles tendon. Didn't matter the model they would fix one issue then it would move to a different place and crack it...

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