Today's Message Index:
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1. 08:10 AM - AT 150 AD (Tiger67B)
2. 03:56 PM - Re: AT 150 AD (A. F. Cacella)
Message 1
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--> TeamGrumman-List message posted by: Tiger67B <jnpsavage@cox.net>
Gary,
I've got an AT-150, with "good" serial numbers....but..... it seems to
drop it's altitude reporting every once in a while...
I get complaints from So Cal, LA Center, etc every once in a
while....like twice/three times a flight....
No correlation ? .....maybe just dirty terminals ??
Jan
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Message 2
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--> TeamGrumman-List message posted by: "A. F. Cacella" <n4zd@juno.com>
> Tiger67B <jnpsavage@cox.net> writes:
> I've got an AT-150, with "good" serial numbers....but.....
> it seems to drop it's altitude reporting every once in a while...
> I get complaints from So Cal, LA Center, etc every once
> in a while....like twice/three times a flight....
Two or three times per flight is hardly "...once in a while...".
The different facilities may be using a common radar system
(thus the consistent troubles) and it may be related more to
that one radar transmitter/receiver system than your AT-150.
Or it may not be. FWIW --
In the Factories of my experience (Western Electric, Bell
System) there is a distinct operation, in a room/area of its own,
called "repair". If a new-production unit fails functional test,
the tester marks the test failure and suggests a repair procedure,
then sends it to the repair room/area/person(s) for the work.
It comes back to be tested again after repair.
Any defective units coming back in from the Field are also
inserted into that Test-Repair-Test loop. It could be that
the "good serial number" unit came back to the Factory as a
Field Repair (Warranty Return ?) and was then =repaired "...to the latest standards..."
involving the "bad" design. The
integrity of s/n tracking is thus blurred, probably protected
against, maybe not, mistakes happen anyway.
Only a detailed internal inspection by your Avionics Shop
or person can determine if the "bad design" is built into your
specific AT-150, good-s/n or no. The good news is that
your Avionics Shop or person ought to have the needed
information and/or parts to effect the necessary corrective
action -- maybe. With Narco's infamous "no field repairs"
policy, it may be necessary to return the unit to Narco....
where product life-cycle may kill it, the infamous Narco
policy of "...We do not support that unit any more..."
=GOOD= luck !!
Art Cacella 1970 American AA-1 N6155L "Dinkie"
Winston-Salem, NC
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