Pawnee air-oil bear strut pressure

On Wednesday, March 10, 2021 at 8:58:59 PM UTC-5, wrote:
On Tuesday, March 9, 2021 at 8:24:22 AM UTC-5, wrote:
On Monday, March 5, 2018 at 9:37:44 PM UTC-5, Charles Longley wrote:
OK I give up. What part are you talking about?

Charlie
Pilot/ A&P
Larry, all you need to do is call Dan at Aerial Banners in Ft. Lauderdale, Florida. Dan is the most knowledgeable person around concerning Pawnee's, he operates about 60 of them and his rebuild shop is impressive. Tell him that I sent you, he will be the best contact available for Pawnee information. Bob
Yes, but be sure ro speak with Dan - owner Bobby is a sociopath!
And you are a bigger PSYCHO than Bobby

On Sunday, March 7, 2021 at 3:44:34 PM UTC-5, barrflyr wrote:
On Tuesday, March 6, 2018 at 12:46:11 PM UTC-6, Dan Daly wrote:
On Tuesday, March 6, 2018 at 10:55:02 AM UTC-5, Roy B. wrote:
On the subject of Pawnee landing gear - be very careful of the Hutch conversion 2 piece slab type gear that is fixed with 3 vertical bolts. If the centermost bolt fails (as it can from vibration over the years) the gear collapses, the prop strikes the ground, and you have a totaled plane from a situation that really can't be detected/inspected before the failure. We lost a towplane that way in a very light landing on grass when the bolt snapped.
The bungee system has some redundancy and the Cessna one piece gear slab is good - but the 2 piece Hutch gear is a problem.
ROY
The PA-25 SB 25/32/04 dated 01/03/2008 describes a Main Landing Gear Shock Absorption System modification adding a cable to restrict lateral movement of the landing gear leg should a piece of the Hydrasorb shock absorber crack and fail (which they do). We had a Pawnee mod'd (bungee gear system) and had the failure of one support on landing. The down wingtip didn't touch, and neither did the prop. Laviasa had a kit (KIT LA-K-005) with support fittings, a security cable, and longer bolts. Money well spent. I have a soft copy of the SB (2 pages text, 3 pages drawings) if anyone wants one. Also pics of the cable having done its job, a closeup of the installation, and a pic of an unluckier Pawnee without the mod kit.

For light reading, I attach a link to a Canadian Civil Aviation Safety Alert showing the fatigue cracking of the part. https://www.tc.gc.ca/eng/civilaviati...11-02-1344.htm

Dan
Dan
Please send the Laviasa PA-25 SB 25/32/04.
John
Did you get it? I think I could upload it to Dropbox if you still need it. Pity there wasn't a place for things like this on the SSA website.

On Tuesday, March 9, 2021 at 8:24:22 AM UTC-5, wrote:
On Monday, March 5, 2018 at 9:37:44 PM UTC-5, Charles Longley wrote:
OK I give up. What part are you talking about?

Charlie
Pilot/ A&P
Larry, all you need to do is call Dan at Aerial Banners in Ft. Lauderdale, Florida. Dan is the most knowledgeable person around concerning Pawnee's, he operates about 60 of them and his rebuild shop is impressive. Tell him that I sent you, he will be the best contact available for Pawnee information. Bob

On Monday, April 5, 2021 at 2:11:19 PM UTC-4, Larry Ruggiero wrote:
On Tuesday, March 9, 2021 at 8:24:22 AM UTC-5, wrote:
On Monday, March 5, 2018 at 9:37:44 PM UTC-5, Charles Longley wrote:
OK I give up. What part are you talking about?

Charlie
Pilot/ A&P
Larry, all you need to do is call Dan at Aerial Banners in Ft. Lauderdale, Florida. Dan is the most knowledgeable person around concerning Pawnee's, he operates about 60 of them and his rebuild shop is impressive. Tell him that I sent you, he will be the best contact available for Pawnee information. Bob

Thanks all. To close this out, I just finished overhauling its left strut with new O-rings and backup rings, and it’s fairly straightforward, although the fact that it’s now weeping 5606 out the bottom weep hole tells me that its days are numbered and we’ll probably convert to the hydrosorb/bungee struts after this season. Also the carb airbox wasn’t as worn as I thought and just needed new rubber bushings, which took awhile to get. Btw, the person referenced at Aerial Banners never returned my call.

Larry Ruggiero, A&P/IA
Carolina Soaring Association

On Monday, April 5, 2021 at 2:23:07 PM UTC-4, Larry Ruggiero wrote:
On Monday, April 5, 2021 at 2:11:19 PM UTC-4, Larry Ruggiero wrote:
On Tuesday, March 9, 2021 at 8:24:22 AM UTC-5, wrote:
On Monday, March 5, 2018 at 9:37:44 PM UTC-5, Charles Longley wrote:
OK I give up. What part are you talking about?

Charlie
Pilot/ A&P
Larry, all you need to do is call Dan at Aerial Banners in Ft. Lauderdale, Florida. Dan is the most knowledgeable person around concerning Pawnee's, he operates about 60 of them and his rebuild shop is impressive. Tell him that I sent you, he will be the best contact available for Pawnee information. Bob
Thanks all. To close this out, I just finished overhauling its left strut with new O-rings and backup rings, and it’s fairly straightforward, although the fact that it’s now weeping 5606 out the bottom weep hole tells me that its days are numbered and we’ll probably convert to the hydrosorb/bungee struts after this season. Also the carb airbox wasn’t as worn as I thought and just needed new rubber bushings, which took awhile to get. Btw, the person referenced at Aerial Banners never returned my call.

Larry Ruggiero, A&P/IA
Carolina Soaring Association

You should have called back! FWIW Dan at Aerial Banners is a great guy and has many parts for Pawnee's and is always willing to assist.

On Monday, April 5, 2021 at 2:23:07 PM UTC-4, Larry Ruggiero wrote:
On Monday, April 5, 2021 at 2:11:19 PM UTC-4, Larry Ruggiero wrote:
On Tuesday, March 9, 2021 at 8:24:22 AM UTC-5, wrote:
On Monday, March 5, 2018 at 9:37:44 PM UTC-5, Charles Longley wrote:
OK I give up. What part are you talking about?

Charlie
Pilot/ A&P
Larry, all you need to do is call Dan at Aerial Banners in Ft. Lauderdale, Florida. Dan is the most knowledgeable person around concerning Pawnee's, he operates about 60 of them and his rebuild shop is impressive. Tell him that I sent you, he will be the best contact available for Pawnee information. Bob
Thanks all. To close this out, I just finished overhauling its left strut with new O-rings and backup rings, and it’s fairly straightforward, although the fact that it’s now weeping 5606 out the bottom weep hole tells me that its days are numbered and we’ll probably convert to the hydrosorb/bungee struts after this season. Also the carb airbox wasn’t as worn as I thought and just needed new rubber bushings, which took awhile to get. Btw, the person referenced at Aerial Banners never returned my call.

Larry Ruggiero, A&P/IA
Carolina Soaring Association
I would convert that back to the hydrosorb/bungee configuration whenever you can. If you convert back you can alter the bungee cords used and go to two cords vs three for a much more docile landing bounce. I did this on all of my Pawnee's and it works well. not having 135 gallons of chemical makes a big difference. I might just have a \n old set of hydrosorbs in my stockpile. Bob

On Monday, April 5, 2021 at 3:54:26 PM UTC-4, wrote:
On Monday, April 5, 2021 at 2:23:07 PM UTC-4, Larry Ruggiero wrote:
On Monday, April 5, 2021 at 2:11:19 PM UTC-4, Larry Ruggiero wrote:
On Tuesday, March 9, 2021 at 8:24:22 AM UTC-5, wrote:
On Monday, March 5, 2018 at 9:37:44 PM UTC-5, Charles Longley wrote:
OK I give up. What part are you talking about?

Charlie
Pilot/ A&P
Larry, all you need to do is call Dan at Aerial Banners in Ft. Lauderdale, Florida. Dan is the most knowledgeable person around concerning Pawnee's, he operates about 60 of them and his rebuild shop is impressive. Tell him that I sent you, he will be the best contact available for Pawnee information. Bob
Thanks all. To close this out, I just finished overhauling its left strut with new O-rings and backup rings, and it’s fairly straightforward, although the fact that it’s now weeping 5606 out the bottom weep hole tells me that its days are numbered and we’ll probably convert to the hydrosorb/bungee struts after this season. Also the carb airbox wasn’t as worn as I thought and just needed new rubber bushings, which took awhile to get. Btw, the person referenced at Aerial Banners never returned my call.

Larry Ruggiero, A&P/IA
Carolina Soaring Association
I would convert that back to the hydrosorb/bungee configuration whenever you can. If you convert back you can alter the bungee cords used and go to two cords vs three for a much more docile landing bounce. I did this on all of my Pawnee's and it works well. not having 135 gallons of chemical makes a big difference. I might just have a \n old set of hydrosorbs in my stockpile. Bob

Bob thanks, would be great to buy them used— they’re pricey new, assuming they’re available at Univair as advertised. Larry

On Monday, April 5, 2021 at 9:19:48 PM UTC-4, Larry Ruggiero wrote:
On Monday, April 5, 2021 at 3:54:26 PM UTC-4, wrote:
On Monday, April 5, 2021 at 2:23:07 PM UTC-4, Larry Ruggiero wrote:
On Monday, April 5, 2021 at 2:11:19 PM UTC-4, Larry Ruggiero wrote:
On Tuesday, March 9, 2021 at 8:24:22 AM UTC-5, wrote:
On Monday, March 5, 2018 at 9:37:44 PM UTC-5, Charles Longley wrote:
OK I give up. What part are you talking about?

Charlie
Pilot/ A&P
Larry, all you need to do is call Dan at Aerial Banners in Ft. Lauderdale, Florida. Dan is the most knowledgeable person around concerning Pawnee's, he operates about 60 of them and his rebuild shop is impressive. Tell him that I sent you, he will be the best contact available for Pawnee information. Bob
Thanks all. To close this out, I just finished overhauling its left strut with new O-rings and backup rings, and it’s fairly straightforward, although the fact that it’s now weeping 5606 out the bottom weep hole tells me that its days are numbered and we’ll probably convert to the hydrosorb/bungee struts after this season. Also the carb airbox wasn’t as worn as I thought and just needed new rubber bushings, which took awhile to get. Btw, the person referenced at Aerial Banners never returned my call.

Larry Ruggiero, A&P/IA
Carolina Soaring Association
I would convert that back to the hydrosorb/bungee configuration whenever you can. If you convert back you can alter the bungee cords used and go to two cords vs three for a much more docile landing bounce. I did this on all of my Pawnee's and it works well. not having 135 gallons of chemical makes a big difference. I might just have a \n old set of hydrosorbs in my stockpile. Bob
Bob thanks, would be great to buy them used— they’re pricey new, assuming they’re available at Univair as advertised. Larry

Larry, when you get ready let me know and I more than likely can help you out. Yes, they are pricey, way too pricey for what we need. Bob