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#11
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Piper 235 tail skin
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#12
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Piper 235 tail skin
On Mon, 25 Feb 2008 16:41:07 -0600, Ross wrote:
Jay and other owners of this aircraft. Any documentation on cracks forming on the horizontal tail surfaces. The -235 I am helping on annual had three additional cracks in the skin beyound the two that were repaired by the previous owner. Got some old skin and made conforming patches. No Piper service releases on this problem? -- Remove numbers for gmail and for God's sake it ain't "gee" either! |
#13
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Piper 235 tail skin
On Feb 26, 6:02 pm, Dave wrote:
RUH ..ROH... Ross, something is very wrong here... Here is the entry, sec 4-55 of my (PA28-151) manual... IN BOLD ITALICS.... WARNING! The use of patch plates for repairs of all moveable tail surfaces is prohibited The use if any filler material normally used for the repair of minor dents and/or materials used for filling the inside of surfaces is also prohibited on all moveable tail surfaces. I understand "stop drilling " is also prohibited... That is the same exact thing that's in my service manual, which is also the Cherokee Warrior PA-28-151 & -161 edition (part # 761 539), and doesn't seem to cover the -235 models specifically. I did find these interesting threads over on the piperowners.org forum, which seems to suggest that the older straight-wing Cherokee service manual did not have the prohibition against patching control surfaces. http://forums.piperowner.org/read/1/...7096#msg-37096 http://forums.piperowner.org/read/1/...4710#msg-84710 |
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Piper 235 tail skin
JGalban via AviationKB.com wrote:
wrote: I did find these interesting threads over on the piperowners.org forum, which seems to suggest that the older straight-wing Cherokee service manual did not have the prohibition against patching control surfaces. It might be the difference between an old manual and a current one. I have an ancient copy of the PA28 service manual and it doesn't prohibit control surface skin repairs. When a crack jumped the stop-drill hole on my rudder, my IA declined to repair it (had to reskin). We compared service manuals and my old one didn't have the prohibition, but his current one did. Word on a Piper forum was that the prohibition was added to the PA28 manuals by Piper in the 90s (which would explain why my old skin was stop drilled). John Galban=====N4BQ (PA28-180) That is my understanding as well. Additionally, you must use the latest service manual, so repairs done now have to conform to the current service manual, as I understand it. I don't believe you need to go back and change old repairs if they were correct for the service manual revision that was current when the repair was done. |
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Piper 235 tail skin
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#17
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Piper 235 tail skin
: It might be the difference between an old manual and a current one. I have
: an ancient copy of the PA28 service manual and it doesn't prohibit control : surface skin repairs. When a crack jumped the stop-drill hole on my rudder, : my IA declined to repair it (had to reskin). We compared service manuals and : my old one didn't have the prohibition, but his current one did. Word on a : Piper forum was that the prohibition was added to the PA28 manuals by Piper : in the 90s (which would explain why my old skin was stop drilled). : John Galban=====N4BQ (PA28-180) I can find no such prohibition in my service manual (P/N 753-586, Feb 27, 2004). It contains information (skin thickness, checking balance, etc) on how to do it. -Cory -- ************************************************** *********************** * Cory Papenfuss, Ph.D., PPSEL-IA * * Electrical Engineering * * Virginia Polytechnic Institute and State University * ************************************************** *********************** |
#18
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Piper 235 tail skin
wrote This is a point of confusion, IMO. As far as I can tell from my PA28 service manual, control surface repairs are possible, since they have a description of how to do it. That includes how to check the balance and state that they're often balanced at the forward end of the range to "allow for repairs." The only "official" information I've heard that says repairs aren't permitted has been 3rd or 4th generation word of mouth. I've also seen a number of PA28's *with* control surface repairs. New thinking at Piper, as reflected in newer manuals, says to replace and not patch the skins. I would think they have discovered important reasons to make that change. The biggest thing that would eat at me, is why the skin cracked, and what is going on inside there that you can not see without taking the skin off. Something caused it to crack, and I would not fly comfortable, without knowing what that was. If you find peace of mind with patches, more power to you. Keep on keeping on, then. :-) -- Jim in NC |
#19
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Piper 235 tail skin
wrote:
I can find no such prohibition in my service manual (P/N 753-586, Feb 27, 2004). It contains information (skin thickness, checking balance, etc) on how to do it. That's strange. When my IA showed me his current manual (on CD), it had the prohibition. As I recall, it was worded the same as described in Dave's post above. John Galban=====N4BQ (PA28-180) -- Message posted via AviationKB.com http://www.aviationkb.com/Uwe/Forums...ation/200803/1 |
#20
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Piper 235 tail skin
New thinking at Piper, as reflected in newer manuals, says to replace and
not patch the skins. I would think they have discovered important reasons to make that change. Yeah, they discovered that they could charge $1600 for a $12 piece of pressed aluminum. -- Jay Honeck Iowa City, IA Pathfinder N56993 www.AlexisParkInn.com "Your Aviation Destination" |
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