---------------------------------------------------------- TeamGrumman-List Digest Archive --- Total Messages Posted Thu 04/16/09: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:34 PM - Squeaking nose gear (SteveR) 2. 10:04 PM - Re: Squeaking nose gear (teamgrumman@AOL.COM) 3. 10:16 PM - strange compression test. (teamgrumman@aol.com) ________________________________ Message 1 _____________________________________ Time: 09:34:45 PM PST US Subject: TeamGrumman-List: Squeaking nose gear From: "SteveR" The nose gear in an AA5 Traveler I've been flying lately started squeaking after a rain shower (the plane is kept outside currently). The squeak is coming from the nose gear torque tube area (very near the firewall). I think maybe it just needs to be lubricated as I read about this elsewhere. Would anyone agree with that? I'm new to Grummans so I'm not sure if the squeaky nose gear is common or not. Bouncing the nose up and down slightly makes it squeak fairly loud. What is the proper procedure and lubricant to use on the torque tube/nose gear strut junction, assuming that is where the squeak is coming from? Does the nose gear strut have to be removed from the torque tube in order to lubricate it? Or if I'm going in completely the wrong direction, I'd be glad to hear about that too. Thanks for any help. Steve Read this topic online here: http://forums.matronics.com/viewtopic.php?p=239660#239660 ________________________________ Message 2 _____________________________________ Time: 10:04:30 PM PST US Subject: Re: TeamGrumman-List: Squeaking nose gear From: teamgrumman@AOL.COM Hi Steve, If you had the shocks on the nose gear, I'd say look there first. You'll need to remove the cowling and locate where the squeak is coming from. If it's in the nose gear torque tube attach, remove the boot around the strut and check the attachment bolts. I've seen a number of planes with AN bolts installed when they should be NAS. Also, if the bolts have been crowded out, they'll need to be reamed a half size over and special bolts installed. Also, I'd suggest you remove the seats and crawl in under the panel and have someone move the nose up and down and check for squeaking in the torque tube itself. -----Original Message----- From: SteveR Sent: Thu, 16 Apr 2009 9:34 pm Subject: TeamGrumman-List: Squeaking nose gear The nose gear in an AA5 Traveler I've been flying lately started squeaking after a rain shower (the plane is kept outside currently). The squeak is coming from the nose gear torque tube area (very near the firewall). I think maybe it just needs to be lubricated as I read about this elsewhere. Would anyone agree with that? I'm new to Grummans so I'm not sure if the squeaky nose gear is common or not. Bouncing the nose up and down slightly makes it squeak fairly loud. What is the proper procedure and lubricant to use on the torque tube/nose gear strut junction, assuming that is where the squeak is coming from? Does the nose gear strut have to be removed from the torque tube in order to lubricate it? Or if I'm going in completely the wrong direction, I'd be glad to hear about that too. Thanks for any help. Steve Read this topic online here: http://forums.matronics.com/viewtopic.php?p=239660#239660 ________________________________ Message 3 _____________________________________ Time: 10:16:27 PM PST US Subject: TeamGrumman-List: strange compression test. From: teamgrumman@aol.com I installed a new Lycoming O360 (roller cam) into a Tiger a few months ago. The break-in was normal with one exception. The #2 cylinder compression was strange. Compression was checked at 10 hrs and 25 hours since new. Both times, the compression on #2 fell off dramatically at 20 to 15 BTDC. Compression came back up slightly to 60/80 at TDC. On the other side, ATDC, compression fell off slightly and then went back up before going back down. At 25 hours, the cylinder was pulled, sent to Lycon for inspection. Valves/seats were recut, rings were honed, cylinder was rehoned. The plane was flown again for 10 hrs and the compression tested. The compression fall-off wasn't as bad, but, it was still there. Plane was flown for another 15 hours. At 50 hours, I removed the cylinder and replaced it with another new cylinder. The owner has about 5 hours on it and I'll be checking it again. Note: when the cylinder was pulled, the piston was removed to the point where I could remove the wrist pin. The top of the piston was scuffed in a "V" shape from about 1 inch below the rings to the ring grooves. At the grooves, the scuffing was about 1 inch wide. I did not remove the piston and look inside. I sent the cylinder to Lycon today. Has anyone ever heard of this before? ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message teamgrumman-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/TeamGrumman-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/teamgrumman-list Browse Digests http://www.matronics.com/digest/teamgrumman-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.