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Stressmerchant
Joined: 28 Oct 2014
Posts: 22
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 Posted: Wed Nov 25, 2020 1:36 am Post subject: Australian Yak-52 warning notice - elevator bellcrank |
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As you may recall, there was a fatal accident involving a Yak-52 in Australia in 2019. The accident report is in review, but the Australian Transport Safety Bureau (ATSB) have released a safety bulletin regarding one of their findings.
The highlighted issue relates to the elevator bellcrank, an issue I'm sure the members of this forum have heard before.
For reference, the ATSB notice is at:
https://www.atsb.gov.au/publications/safety-advisory-notice/ao-2019-027-san-024/
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wdjester(at)cox.net
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| Posted: Wed Nov 25, 2020 9:27 am Post subject: Australian Yak-52 warning notice - elevator bellcrank |
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So where can the steel bellcranks be purchased?
Sent from my iPhone
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dsavarese0812(at)bellsout
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| Posted: Wed Nov 25, 2020 11:01 am Post subject: Australian Yak-52 warning notice - elevator bellcrank |
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One unanswered question. What was the condition of the 4 bolts and nuts securing the elevator counterweight to the bell rank? I guarantee if those bolts were not properly secured, that counterweight moves and put significant side loads on the bell tank. That side loading may be the cause of original bell rank cracking. Those bolts and nuts should be checked at each inspection and marked with torque seal. How many of them have been other than visually inspected?
Dennis
Sent from my iPhone
| Quote: | On Nov 25, 2020, at 12:29 PM, Dave Jester <wdjester(at)cox.net> wrote:
So where can the steel bellcranks be purchased?
Sent from my iPhone
> On Nov 25, 2020, at 3:40 AM, Stressmerchant <mike_beresford(at)yahoo.co.uk> wrote:
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> As you may recall, there was a fatal accident involving a Yak-52 in Australia in 2019. The accident report is in review, but the Australian Transport Safety Bureau (ATSB) have released a safety bulletin regarding one of their findings.
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> The highlighted issue relates to the elevator bellcrank, an issue I'm sure the members of this forum have heard before.
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> For reference, the ATSB notice is at:
> https://www.atsb.gov.au/publications/safety-advisory-notice/ao-2019-027-san-024/
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> Read this topic online here:
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> http://forums.matronics.com/viewtopic.php?p=499511#499511
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