Safetying RH Balance Turnbuckle
Forum rules
You must be a member of the Cessna 120-140 Association in order to post new topics, reply to existing topics, or search for information on this forum. Use the "Join" link in the red menu bar.
You must be a member of the Cessna 120-140 Association in order to post new topics, reply to existing topics, or search for information on this forum. Use the "Join" link in the red menu bar.
- 6643
- Posts: 2754
- Joined: Tue May 01, 2018 7:00 am
- Name: John C
- Location: KLCI, NH
- Aircraft Type: 1946 C140/C90
- Occupation-Interests: A&P, semi-retired
- Contact:
Re: Safetying RH Balance Turnbuckle
Can't tell you why, but, SLN-65 states that the wire goes around the bolt, not the eye, and to check it for wear at inspection time.
John Cooper
www.skyportservices.net
www.skyportservices.net
- 6597
- Posts: 541
- Joined: Tue May 01, 2018 7:00 am
- Name: David Sbur
- Location: Vancouver WA KVUO
- Aircraft Type: '46 140 0-200A
- Occupation-Interests: Agriculture
- Contact:
Re: Safetying RH Balance Turnbuckle
I'd sure like to see a pic of that, is that supposed to be a fork or a pin eye for the carry-thru cable on the right side? I think the parts books shows for an eye instead of a fork. Fork would be much easier and make sense with the SLN-65.
SLN-65 excerpt- 2. Inspect the safety wire on the aileron carry-thru cable turnbuckle in the right wing for wear and breakage at that point where the wire passes around the bolt that secures the turnbuckle eye to the bellcrank. Excessive wear of the safety wire is possible at this point as a result of a combination of clearance and bellcrank action.
-
cdoughty
- Posts: 53
- Joined: Mon Mar 09, 2020 8:51 am
- Name:
- Aircraft Type:
- Occupation-Interests:
- Contact:
Re: Safetying RH Balance Turnbuckle
Fork is too wide to fit between the ears of the bellcrank.
My airplane initially had the safety wire just wrapped around the pineye shank-in other words it wasn’t really safetied.
When the sln says around the bolt they mean the bolt through the eye and in a big loop following the eye outside surface. If this loop gets caught between the eye and the bellcrank ears it could pinch and wear or break.
I replaced it with a clip style turnbuckle.
My airplane initially had the safety wire just wrapped around the pineye shank-in other words it wasn’t really safetied.
When the sln says around the bolt they mean the bolt through the eye and in a big loop following the eye outside surface. If this loop gets caught between the eye and the bellcrank ears it could pinch and wear or break.
I replaced it with a clip style turnbuckle.
- 6597
- Posts: 541
- Joined: Tue May 01, 2018 7:00 am
- Name: David Sbur
- Location: Vancouver WA KVUO
- Aircraft Type: '46 140 0-200A
- Occupation-Interests: Agriculture
- Contact:
Re: Safetying RH Balance Turnbuckle
I'd like to present that to my IA for my next annual if you have a part number for that. I really want to change that out.I replaced it with a clip style turnbuckle.