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I put an stec 55x in my cessna 4 years ago. It took about a year to get right.
The board went back to the factory 3 times I think. I got 1 or 2 new alt transducers for free.
All the pins on the main connector were replaced and rewired.
Neither of those was the problem as far as I can tell.
In my case it was the db25 connector on the back of the tray. The silly thing has a plastic housing held to the back of the tray be two small bolts. The insertion force is so high we wore out the plastic housing. Replace housing, everything works. They claim it violates the STC to put a metal housing on the connector.
Works very nicely now, except for yaw in turbulence.
I bought a tru-trak for the IVP....
If it were me I would insist on a free new alt transducer and pay for the servo's.
Colyn Case
----- Original Message ----- From: <dskeele@bellsouth.net>
To: "Lancair Mailing List" <lml@lancaironline.net>
Sent: Thursday, May 12, 2005 5:52 PM
Subject: [LML] S-Tec A/P Part
Another great adventure with S-Tec.. Looking for an Altitude Transducer Part #0111. After a couple of times sending the controller (S-Tec 50) back to replace a Pico Fuse at $150 per..( Had to be a short in the wiring harness they kept saying, so replaced harness, the system still would not hold an altittude. This whole thing has gone on for several months.. Finally, today I read the resistance values of the Altitude Transducer itself and olah !!! factory then admitted that that was my problem, I should have done it sooner, but not being a avionics wizard..Whine Factory wants over a Grand for a new one, no repairs. Same deal with their servos, as they age the motors tend to get into a "groove" , buy a new one or for about $800 they will install a new motor .. Wa a pretty good system to start with, BUT...
I post all this whining for those of you still considering an A/P purchase.. Anyway, any of you good people with a reasonable source, I would appreciate a call Don Skeele 850-626-4946 N320J
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