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GrummanDude
Joined: 15 Jan 2006
Posts: 926
Location: Auburn, CA
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 Posted: Sat Dec 23, 2006 1:17 pm Post subject: Tiger Annual |
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OK, how many times have you heard, "All Lycoming engines are the same,
any mechanic can work on them." and "Grummans are just airplanes.
A&Ps work on airplanes. Why do I need a Grumman specific mechanic?"
OK, well, this Tiger, the aluminum portion of the breather was
installed upside down. The cylinder baffles are made of .050
galvanized steel, and they are so high that they chafe on the upper
cowling. The screws that hold on the inner side of the oil coolerr
were installed backward with the nut against the cylinder. The baffle
is being held about 3/8 inch away from the cylinder. The upper cowling
was mounted UNDER the nose bowl, the flange on the nose bowl is
cracking away. The inner baffle on #1 that curves up in the front is
about 2 inches too high. (oh, yea, the owner complained of high CHTs.
None of the baffle straps around the bottom of the cylinders were tied
down. The steel brace on the left rear baffle had been bent out of the
way because, apparently, they didn't know where it went. The airbox
had been repaired and the phenolic block not installed. There is a
brace missing in the airbox that holds the airfilter in place. The 4"
air duct to the carb is SCAT tubing, not the correct duct.
and I'm just getting started.
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Gary
AuCountry Aviation
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GrummanDude
Joined: 15 Jan 2006
Posts: 926
Location: Auburn, CA
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| Posted: Sun Dec 24, 2006 12:21 am Post subject: Tiger Annual |
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OH, Yea, I almost forgot. Some dumbass RTV'd the baffle strap on the
#4 cylinder to the cylinder. I dug out RTV that went as much as an
inch up into the fins.
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| | - The Matronics TeamGrumman-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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Gary
AuCountry Aviation
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flyv35b(at)minetfiber.com
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| Posted: Wed Dec 27, 2006 7:27 am Post subject: Tiger Annual |
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| Quote: | OK, well, this Tiger, the aluminum portion of the breather was installed
upside down. The cylinder baffles are made of .050 galvanized steel, and
they are so high that they chafe on the upper cowling. The screws that
hold on the inner side of the oil coolerr were installed backward with the
nut against the cylinder. The baffle is being held about 3/8 inch away
from the cylinder. The upper cowling was mounted UNDER the nose bowl, the
flange on the nose bowl is cracking away. The inner baffle on #1 that
curves up in the front is about 2 inches too high. (oh, yea, the owner
complained of high CHTs. None of the baffle straps around the bottom of
the cylinders were tied down. The steel brace on the left rear baffle had
been bent out of the way because, apparently, they didn't know where it
went. The airbox had been repaired and the phenolic block not installed.
There is a brace missing in the airbox that holds the airfilter in place.
The 4" air duct to the carb is SCAT tubing, not the correct duct.
and I'm just getting started.
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Well Gary, it seems you have the "misfortune" of getting to work on these
"derelict" planes. Sounds like either a plane that some owner had worked on
himself trying to save money or some ignorant mechanic that should have his
license suspended. Many times it's difficult to tell which unless the owner
admits to it. Probably this is the owners "first" annual after buying his
plane and he wasn't even aware of some of these very obvious problems when
he bought the plane. Hopefully the owner will be happy that you are
correcting these issues and making the plane airworthy again. And hopefully
he won't bitch about the high cost of the infamous dreaded first annual!
Education does not come cheap and neither do good airworthy planes.
I'm sure we'll hear more of your continuing saga.
Cliff A&P/IA
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GrummanDude
Joined: 15 Jan 2006
Posts: 926
Location: Auburn, CA
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| Posted: Fri Dec 29, 2006 2:19 am Post subject: Tiger Annual |
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Thanks Cliff. I've already started on this Tiger. I suspect Grummans
are coming out of the woodwork here because there hasn't been anyone
local to work on them. This is the third derelict in 4 months. Annual
cost of 7,000+, 14,000+ and this one. The really sucky thing is they
take so long. Planes start stacking up around my hangar. I love it .
. . .
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Gary
AuCountry Aviation
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flyv35b(at)minetfiber.com
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| Posted: Fri Dec 29, 2006 7:16 am Post subject: Tiger Annual |
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Possibly, but a good conscientious mechanic would not allow the sort of
things you mentioned to pass an annual inspection. I wouldn't if it were on
a Piper, Cessna or whatever else I was working on. The standards should be
the same on whatever you work on and it doesn't take Grumman specific
expertise to recognize galvanized steel baffling that is rubbing on the
cowling! Besides they are supposed to have the factory maintenance manual
and follow it when doing the work. No excuses IMO.
Just think, in a couple more years you will have "gone through" all the
derelict planes and only have repeat customers with planes in much better
condition.
Happy New Year
Cliff
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GrummanDude
Joined: 15 Jan 2006
Posts: 926
Location: Auburn, CA
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| Posted: Fri Dec 29, 2006 2:04 pm Post subject: Tiger Annual |
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I would hope so.
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Gary
AuCountry Aviation
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