Rejected Exhaust Rocker Arms

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4945
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Joined: Tue May 01, 2018 7:00 am
Name: Gary
Location: Stockton, CA
Aircraft Type: C-120
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Re: Rejected Exhaust Rocker Arms

Post by 4945 »

6597 wrote: Wed Feb 12, 2025 10:12 pm
steel rivet to fill the hole
Probably a round-head Type U drive screw/screw nail. I can't imagine that being legal or safe unless you can actually find that Service Letter...
No way I'd do it without the service letter or some other valid documentation ("Approved Data"). Nor would the A&P I'm working with allow me to do it.

Gary
4945
Posts: 56
Joined: Tue May 01, 2018 7:00 am
Name: Gary
Location: Stockton, CA
Aircraft Type: C-120
Occupation-Interests: Retired Congressional Staff, Navy Reserve Retiree, Former P-3 Flight Engineer, Former aerospace technician
Contact:

Re: Rejected Exhaust Rocker Arms

Post by 4945 »

I just got the rejects back from Aircraft Specialties. I didn't see this when I sent them. The hole is the reason they were rejected.
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6597
Posts: 402
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Name: David Sbur
Location: Vancouver WA KVUO
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Re: Rejected Exhaust Rocker Arms

Post by 6597 »

Could someone think that might possibly squirt oil to the valve stem? Pretty big hole....
4945
Posts: 56
Joined: Tue May 01, 2018 7:00 am
Name: Gary
Location: Stockton, CA
Aircraft Type: C-120
Occupation-Interests: Retired Congressional Staff, Navy Reserve Retiree, Former P-3 Flight Engineer, Former aerospace technician
Contact:

Re: Rejected Exhaust Rocker Arms

Post by 4945 »

I should have noticed that when I received them.
V529
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Name: Victor G
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Re: Rejected Exhaust Rocker Arms

Post by V529 »

4945 wrote: Thu Feb 13, 2025 11:15 am
6597 wrote: Wed Feb 12, 2025 10:12 pm
steel rivet to fill the hole
Probably a round-head Type U drive screw/screw nail. I can't imagine that being legal or safe unless you can actually find that Service Letter...
No way I'd do it without the service letter or some other valid documentation ("Approved Data"). Nor would the A&P I'm working with allow me to do it.

Gary
It's been years, but I know I've seen this done.......(steel rivet in the oil hole) and they had been in the engine for years before I got to them. I've also seen the hole in the rocker shaft bearing area, but it was much smaller. I'm going to an IA seminar in a couple days, if G&N engines is presenting(they usually are) I'll ask them. Dennis has been at this (engine overhaul gig) forever..........literally.........and would probably know off the top of his head.

Super bummer about Smokin' Rivet. Todd is a good friend, I"m going to reach out to him.
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