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
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| Subject: | 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
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| Subject: | Re: 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
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Message 3
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| Subject: | Re: 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" <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
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| Subject: | Re: 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" <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.
Be safe,
Greg
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