---------------------------------------------------------- TeamGrumman-List Digest Archive --- Total Messages Posted Fri 04/30/04: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:10 AM - AT 150 AD (Tiger67B) 2. 03:56 PM - Re: AT 150 AD (A. F. Cacella) ________________________________ Message 1 _____________________________________ Time: 08:10:51 AM PST US From: Tiger67B Subject: TeamGrumman-List: AT 150 AD --> TeamGrumman-List message posted by: Tiger67B 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 -- Visit our PERSONAL WEBSITE at: http://www.geocities.com/tiger67bravo/ ________________________________ Message 2 _____________________________________ Time: 03:56:21 PM PST US Subject: Re: TeamGrumman-List: AT 150 AD From: "A. F. Cacella" --> TeamGrumman-List message posted by: "A. F. Cacella" > Tiger67B 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