bruno_Tuga Posted May 16, 2016 Share Posted May 16, 2016 Hello, i have this problem, during flight when A/C turns the c-12 #1, the digits in de digital controller, stop moving. Whem aircraft get´s in the normal position the c-12 start working and the heading is corrected, comparing with #2. I think it´s de directional gyro, what do you think? Thanks Quote Link to comment Share on other sites More sharing options...
n1dp Posted May 17, 2016 Share Posted May 17, 2016 It is the C-12 gyro. Do you have a manual to do an operational test of the system on the ground? Quote Link to comment Share on other sites More sharing options...
bruno_Tuga Posted May 17, 2016 Author Share Posted May 17, 2016 I have one manual, but if you can share other to compare, it´s ok. Today i tray to simulate the problem in the ground. During a turn i release the gyro and putted in 45º, but didn´t find any problem. Could it be because the turn was slow? I turned the gyro 45º or more left and right, but the c-12 was always working fine. Quote Link to comment Share on other sites More sharing options...
n1dp Posted May 18, 2016 Share Posted May 18, 2016 The "rate switching" for the C-12 system is in the gyro. There is a bank angle that the C-12 system senses and switches the reference from the flux valve (magnetic azimuth detector) to the gyro. That appears to be what is not working. There is a drift test in the manual performed by placing the switch in DG and recording compass card drift over a set time. That does not check the rate switching. In your last post it sounds like it is switching properly between MAG and DG modes.in a turn again. If it is at all intermittent, replace the gyro. MAG = Magnetic DG = Directional Gyro A simple check would be to swap the gyros between the systems and see if the problem follows with the suspect gyro. Quote Link to comment Share on other sites More sharing options...
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