---------------------------------------------------------- TeamGrumman-List Digest Archive --- Total Messages Posted Sat 09/22/12: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:13 PM - Re: Melted wire (Gary L Vogt) 2. 09:35 PM - Re: Melted wire (Bob Steward) 3. 09:42 PM - Re: Melted wire (Frank Sundram) 4. 09:49 PM - Re: Melted wire (Bob Steward) 5. 09:50 PM - Re: Melted wire (Bob Steward) ________________________________ Message 1 _____________________________________ Time: 09:13:03 PM PST US Subject: Re: TeamGrumman-List: Melted wire From: Gary L Vogt No ones ever heard of this? Gary Sent from my iPad On Sep 20, 2012, at 7:27 PM, Gary Vogt wrote: > One of the Tigers I maintain started having that old wire burning smell. N ot all the time. Off and on. Smoke once. Never repeatable. > > A mechanic outside Oshkosh identified 51PA3 as having a 'rough, bubbly sur face.' This wire was under the panel toward the middle in a bundle of wires . > > Yesterday, I found the same thing without the knowledge of the previous fi nd. 51PA3 is a ground wire. No circuit breaker or fuse. > > I followed the wire to the engine side and noticed several melted looking a reas. > > Figuring the wire needed to be replaced anyway, I cut into it and put an a mmeter in series. The battery relay that is energized by adding ground the t he middle terminal is at the end of the wire. > This wire drew 0.065 to 0.70 amps. The really odd thing was that it got r eally hot while I was holding it. > > I replaced it with No.18 wire. The removed wire had a LOT of places on th e wire where the shielding had either been melted or worn away; I couldn't t ell why the shielding was missing. The wire in those areas was very corrode d. > > Anyone else ever seen anything like that? > > From: Bob Steward > To: teamgrumman-list@matronics.com > Sent: Thursday, September 20, 2012 5:49 PM > Subject: Re: TeamGrumman-List: Brake Reservoir Relocated? > m> > > I worked on a Traveler that had been modified like that. > Worked fine, but could have been better engineered. > --Bob St= - The TeamGrumman-List Email Forum -<= Same great c ontent also &nbs============== ==== > > > > > > > ========================== ========= ========================== ========= ========================== ========= ========================== ========= > ________________________________ Message 2 _____________________________________ Time: 09:35:49 PM PST US Subject: Re: TeamGrumman-List: Melted wire From: Bob Steward You're saying that this is a shielded GROUND wire? Haven't had a chance to look at the manual schematics to see what circuit 51PA3 is part of. Can't imagine the need for a shielded ground (except the P-leads). --Bob Steward ________________________________ Message 3 _____________________________________ Time: 09:42:16 PM PST US Subject: Re: TeamGrumman-List: Melted wire From: Frank Sundram Go to sleep, bob, day of rest and all. Restful Woofs from the boys Frank 850-819-1666 On Sep 22, 2012, at 11:35 PM, Bob Steward wrote: > > You're saying that this is a shielded GROUND wire? > Haven't had a chance to look at the manual schematics to see what circuit 51PA3 is part of. > Can't imagine the need for a shielded ground (except the P-leads). > --Bob Steward > > > > > ________________________________ Message 4 _____________________________________ Time: 09:49:21 PM PST US Subject: Re: TeamGrumman-List: Melted wire From: Bob Steward I found 51PA4 wire code for the ground from the battery side of the Master Switch to the airframe ground on the 70's Tigers and Cheetahs. This is a ~6" long segment of plain, unshielded wire with a 1/4" female spade terminal at the Master and a #6 ring terminal on the other end that grounds to the honeycomb with a #4 sheet metal screw. The normal convention is that each segment in a circuit has the next # as the last digit. So there SHOULD be 3 previous segments in this circuit. There are not. What does your 51PA3 connect to? --Bob Steward ________________________________ Message 5 _____________________________________ Time: 09:50:47 PM PST US Subject: Re: TeamGrumman-List: Melted wire From: Bob Steward Gary has me stirred up over this. N200FW canopy plastic looks very nice, if I do say so myself! --Bob Frank Sundram wrote: > >Go to sleep, bob, day of rest and all. > >Restful Woofs from the boys > >Frank >850-819-1666 > >On Sep 22, 2012, at 11:35 PM, Bob Steward wrote: > >> >> You're saying that this is a shielded GROUND wire? >> Haven't had a chance to look at the manual schematics to see what circuit 51PA3 is part of. >> Can't imagine the need for a shielded ground (except the P-leads). >> --Bob Steward >> >> >> >> >> > > ------------------------------------------------------------------------------------- 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.