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Bell 505 TC EAD

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Bell 505 TC EAD

Old 22nd Feb 2021, 11:12
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Bell 505 TC EAD

See attachment for Emergency AD re Collective on Bell 505
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Old 22nd Feb 2021, 11:31
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So the whole collective came off? Good that it happened before start (full & free check) but.... WOW!
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Old 22nd Feb 2021, 19:33
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Originally Posted by John R81 View Post
So the whole collective came off? Good that it happened before start (full & free check) but.... WOW!
Interesting case would it happen during flight...
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Old 22nd Feb 2021, 19:34
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Originally Posted by John R81 View Post
So the whole collective came off? Good that it happened before start (full & free check) but.... WOW!
Interesting case would it happen during flight...
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Old 23rd Feb 2021, 17:19
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Originally Posted by 172510 View Post
Interesting case would it happen during flight...
Yeah indeed. Now please tell us what the correct emergency procedure is (for stuck collective).
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Old 23rd Feb 2021, 17:29
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https://www.ainonline.com/aviation-n...5-emergency-ad

Cracked Collective Prompts Bell 505 Emergency AD

by Mark Huber
- February 22, 2021, 11:15 AM
Yesterday, Transport Canada (TC) issued an emergency airworthiness directive (AD) mandating immediate inspection of collective sticks in Bell 505 turbine light single helicopters. TC took the action after Bell reported an instance of a stick and grip assembly fracturing above the cabin floor at the junction with the collective jackshaft. The fracture was discovered before engine start during the preflight check of flight controls; its exact cause is under investigation.


Over the weekend, Bell published an Alert Service Bulletin (ASB) for a one-time inspection of the controls. TC’s emergency AD makes the inspection mandatory and is considered an interim action. Per Bell’s ASB, the inspection is expected to take two man-hours and requires removal, cleaning, and inspection of the collective stick and grip assembly with a 10X magnifying glass and strong light. If a crack is suspected or detected, a further fluorescent penetrant inspection in the area of the crack is required. Unserviceable sticks must be replaced before further flight.

Bell has delivered 300 of the five-seat Model 505s since 2017.
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Old 24th Feb 2021, 09:18
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In flight, with dual controls and two pilots, would have this incident impaired the whole collective pitch control ?
ATN

Last edited by ATN; 24th Feb 2021 at 09:21. Reason: add a clarification
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Old 24th Feb 2021, 12:07
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Looks like the guy who made the 206 cyclic sticks back in the 80s is now running the 505 collective stick production. Except back then the cyclic stick broke off clean during a pre-start control check. They've been inspecting 206 cyclics ever since for that same issue. One day they'll get it right.
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Old 24th Feb 2021, 20:28
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Originally Posted by wrench1 View Post
Looks like the guy who made the 206 cyclic sticks back in the 80s is now running the 505 collective stick production. Except back then the cyclic stick broke off clean during a pre-start control check. They've been inspecting 206 cyclics ever since for that same issue. One day they'll get it right.
The collective stick tube on the 505 is actually designed and built by Mecaer Aviation Group in Italy for Bell
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Old 27th Feb 2021, 13:42
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Rev A of ASB 505-21-20 out today; LPI required every 25 Hrs

Fly safe, always
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Old 27th Feb 2021, 15:00
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https://www.bellcustomer.com/Bulleti...&CategoryID=-1

I think you meant FPI: fluorescent penetrant inspection. What a PITA for 505 owners. And every 25 hours, too.
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Old 4th Mar 2021, 13:38
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Thanks for the correction!

Rev. B is out today, doing away with the repetitive 25 Hr FPI, providing helicopter is flown single pilot, from the left seat. New parts being designed and should be available soon.

Fly Safe, Always
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