---------------------------------------------------------- Pulsar-List Digest Archive --- Total Messages Posted Sun 07/21/13: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 10:04 AM - Re: Another nose gear failure (DON SURRATT) 2. 11:03 AM - Re: Another nose gear failure (GREGSMI@aol.com) 3. 01:11 PM - Re: Another nose gear failure (George Gennuso) 4. 02:31 PM - Re: Another nose gear failure (GREGSMI@aol.com) ________________________________ Message 1 _____________________________________ Time: 10:04:48 AM PST US From: DON SURRATT Subject: RE: Pulsar-List: Another nose gear failure Greg=2C have these failures been with the solid cross strut or the spring/s hock cross strut? I have the optional spring/shock that aero designs offere d for the nose gear and would think that would mitigate sudden and hard sho ck to the nose gear collar and weld area of the pivot bolt fork area. Have not seen any of the e-mails when failures happen stating if the nose gear h ad the shock system or not?thanks Don Surratt From: GREGSMI@aol.com Subject: Pulsar-List: Another nose gear failure =0A =0A =0A =0A =0A =0A We =0A have another nose gear failure=2C this one caught by the owner=2C during an =0A inspection. In this case=2C the weld on the back side of the collar had cra cked. =0A Fortunately=2C this was caught before the nose gear fell off. =0A This =0A is the forth failure I know about in the last two years in the United State s. I =0A have talked with Alan Gill in the UK and he says they had 4 ' 5 failures and =0A have started modifying the gears to a sleeve and bolt concept. The issue is that =0A the majority of spindle failures have been inside the collar thus an inspec tion =0A may not reveal the failure until it happens. If a total failure occurs it c an =0A cause considerable damage to the aircraft=2C imagine landing your plane wit h the =0A front wheel and fork missing.=0A It is =0A difficult to say what is causing the failures but if you are loading the no se =0A gear=2C an example is 582 flown with full header tank or all 912=92s=2C whe re the nose =0A gear weight is high=2C or using non hard surface runways=2C then the nose g ear is =0A carrying a lot of weight. =0A In any =0A event=2C given the crack found today on a 912 aircraft that has been in ser vice =0A for a while=2C it is safe to say that all nose gears should be carefully in spected =0A for cracks in the weld area and also check the spindle to assure it is stra ight. =0A If bent or a crack has formed=2C the gear needs immediate attention. Since the =0A collar may hide a fatigue crack in the spindle=2C even these inspections ma y not =0A reveal a problem.=0A We =0A have two engineers in our group that are working on a simple fix=2C similar to =0A that used in the UK. They should have it completed this week. When the deta ils =0A are worked out=2C the repair will be offered to the group. Drawings will be =0A provided and if desired=2C they can provide a complete repair. =0A Be =0A safe=2C=0A Greg=0A =0A =0A ============0A ============0A ============0A ============0A =0A ________________________________ Message 2 _____________________________________ Time: 11:03:14 AM PST US From: GREGSMI@aol.com Subject: Re: Pulsar-List: Another nose gear failure The failures have occurred with both the solid strut and the shock. Greg In a message dated 7/21/2013 12:05:14 P.M. Central Daylight Time, surratt_do@msn.com writes: Greg, have these failures been with the solid cross strut or the spring/shock cross strut? I have the optional spring/shock that aero design s offered for the nose gear and would think that would mitigate sudden and hard shock to the nose gear collar and weld area of the pivot bolt fork area. Ha ve not seen any of the e-mails when failures happen stating if the nose gear h ad the shock system or not? thanks Don Surratt ____________________________________ From: GREGSMI@aol.com Subject: Pulsar-List: Another nose gear failure We have another nose gear failure, this one caught by the owner, during an inspection. In this case, the weld on the back side of the collar had cracked. Fortunately, this was caught before the nose gear fell off. This is the forth failure I know about in the last two years in the United States. I have talked with Alan Gill in the UK and he says they had 4 =93 5 failures and have started modifying the gears to a sleeve and bolt concept . The issue is that the majority of spindle failures have been inside the collar thus an inspection may not reveal the failure until it happens. If a total failure occurs it can cause considerable damage to the aircraft, imagine landing your plane with the front wheel and fork missing. It is difficult to say what is causing the failures but if you are loading the nose gear, an example is 582 flown with full header tank or all 912 =99s, where the nose gear weight is high, or using non hard surface runways, then the nose gear is carrying a lot of weight. In any event, given the crack found today on a 912 aircraft that has been in service for a while, it is safe to say that all nose gears should be carefully inspected for cracks in the weld area and also check the spindle to assure it is straight. If bent or a crack has formed, the gear needs immediate attention. Since the collar may hide a fatigue crack in the spind le, even these inspections may not reveal a problem. We have two engineers in our group that are working on a simple fix, similar to that used in the UK. They should have it completed this week. W hen the details are worked out, the repair will be offered to the group. Drawi ngs will be provided and if desired, they can provide a complete repair. Be safe, Greg ========== target="_blank">http://www.matronics.com/Navigator?Pulsar-List =========== http://forums.matronics.com ==== ======= ="_blank">http://www.matronics.com/contribution ======== === ________________________________ Message 3 _____________________________________ Time: 01:11:09 PM PST US From: George Gennuso Subject: Re: Pulsar-List: Another nose gear failure I'm wondering if the failures have occurred with the 582 Pulsar's. So far I have had no issues with my 582 nose wheel.=0A=C2-=0AGeorge G=0A =0A=0A__ ______________________________=0A From: "GREGSMI@aol.com" =0ATo: pulsar-list@matronics.com =0ASent: Sunday, July 21, 2013 11:00 AM=0A Subject: Re: Pulsar-List: Another nose gear failure=0A =0A=0A=0AThe failur es have occurred with both the solid strut and the shock. =0A=0AGreg =0A =0AIn a message dated 7/21/2013 12:05:14 P.M. Central Daylight Time, =0Asur ratt_do@msn.com writes: =0AGreg, have these failures been with the solid cr oss strut or the spring/shock cross strut? I have the optional spring/shoc k that aero designs offered for the nose gear and would think that would m itigate sudden and hard shock to the nose gear collar and weld area of the pivot bolt fork area. Have not seen any of the e-mails when failures happ en stating if the nose gear had the shock system or not? =0A>thanks Don Su rratt=0A>=0A>=0A>=0A>________________________________=0A>=0AFrom: GREGSMI@a ol.com=0A>Date: Wed, 17 Jul 2013 21:15:41 -0400=0A>Subject: =0A Pulsar-Lis t: Another nose gear failure=0A>To: Pulsar-Aviators@yahoogroups.com; =0A p ulsar-list@matronics.com=0A>=0A>We have another nose gear failure, this one caught by the owner, during an inspection. In this case, the weld on the back side of the collar had cracked. Fortunately, this was caught before t he nose gear fell off. =0A>This is the forth failure I know about in the l ast two years in the United States. I have talked with Alan Gill in the UK and he says they had 4 =93 5 failures and have started modifying th e gears to a sleeve and bolt concept. The issue is that the majority of sp indle failures have been inside the collar thus an inspection may not reve al the failure until it happens. If a total failure occurs it can cause co nsiderable damage to the aircraft, imagine landing your plane with the fro nt wheel and fork missing. =0A>It is difficult to say what is causing the f ailures but if you are loading the nose gear, an example is 582 flown with full header tank or all 912=99s, where the nose gear weight is high , or using non hard surface runways, then the nose gear is carrying a lot of weight. =0A>In any event, given the crack found today on a 912 aircraft that has been in service for a while, it is safe to say that all nose gea rs should be carefully inspected for cracks in the weld area and also chec k the spindle to assure it is straight. If bent or a crack has formed, the gear needs immediate attention. Since the collar may hide a fatigue crack in the spindle, even these inspections may not reveal a problem. =0A>We h ave two engineers in our group that are working on a simple fix, similar t o that used in the UK. They should have it completed this week. When the d etails are worked out, the repair will be offered to the group. Drawings w ill be provided and if desired, they can provide a complete repair. =0A>Be safe, =0A>Greg=0A>target="_blank">http://www.matronics.com/Navigator?Pul sar-List=0Ahttp://forums.matronics.com=0A="_blank">http://www.matronics.c om/contribution =0A>ef="http://www.matronics.com/Navigator?Pulsar-List">h ttp://www.matronics.com/Navigator?Pulsar-List s.matronics.com/">http://foru ms.matronics.com=0Ap://www.matronics.com/contribution">http://www.matronics ===================== ________________________________ Message 4 _____________________________________ Time: 02:31:20 PM PST US From: GREGSMI@aol.com Subject: Re: Pulsar-List: Another nose gear failure George, cannot say for sure, but if you fly frequently with a full header tank you are placing a big load on the nose gear, the same as a 912 engine. In a message dated 7/21/2013 3:11:32 P.M. Central Daylight Time, pulsar1@sbcglobal.net writes: I'm wondering if the failures have occurred with the 582 Pulsar's. So far I have had no issues with my 582 nose wheel. George G From: "GREGSMI@aol.com" Sent: Sunday, July 21, 2013 11:00 AM Subject: Re: Pulsar-List: Another nose gear failure The failures have occurred with both the solid strut and the shock. Greg In a message dated 7/21/2013 12:05:14 P.M. Central Daylight Time, surratt_do@msn.com writes: Greg, have these failures been with the solid cross strut or the spring/shock cross strut? I have the optional spring/shock that aero desig ns offered for the nose gear and would think that would mitigate sudden and hard shock to the nose gear collar and weld area of the pivot bolt fork area. H ave not seen any of the e-mails when failures happen stating if the nose gear had the shock system or not? thanks Don Surratt From: GREGSMI@aol.com Subject: Pulsar-List: Another nose gear failure We have another nose gear failure, this one caught by the owner, during an inspection. In this case, the weld on the back side of the collar had cracked. Fortunately, this was caught before the nose gear fell off. This is the forth failure I know about in the last two years in the United States. I have talked with Alan Gill in the UK and he says they had 4 =93 5 failures and have started modifying the gears to a sleeve and bolt concept . The issue is that the majority of spindle failures have been inside the collar thus an inspection may not reveal the failure until it happens. If a total failure occurs it can cause considerable damage to the aircraft, imagine landing your plane with the front wheel and fork missing. It is difficult to say what is causing the failures but if you are loading the nose gear, an example is 582 flown with full header tank or all 912 =99s, where the nose gear weight is high, or using non hard surface runways, then the nose gear is carrying a lot of weight. In any event, given the crack found today on a 912 aircraft that has been in service for a while, it is safe to say that all nose gears should be carefully inspected for cracks in the weld area and also check the spindle to assure it is straight. If bent or a crack has formed, the gear needs immediate attention. Since the collar may hide a fatigue crack in the spin dle, even these inspections may not reveal a problem. We have two engineers in our group that are working on a simple fix, similar to that used in the UK. They should have it completed this week. W hen the details are worked out, the repair will be offered to the group. Drawi ngs will be provided and if desired, they can provide a complete repair. 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