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Thank you, Terry

HI, Thanks for the further response. I have done a very careful check of the wiring today and am pretty sure that it is OK. I have also remembered that 2 or 3 months ago the compass suddenly gave odd readings. I did a re-calibration and all was well until this problem arose. I am beginning to...

Hi, Thanks for the quick response. I flew the aircraft today and on power switch-on the compass came up fine but died on me after about a minute. This was without the engine running so the amount of vibration etc was minimal. After that it wouldn't work apart from the odd effect described above...

My system is the usual D100, D120 Autopilot etc. After many hours of use with no problems I now get the 'remote compass not detected' message and no compass reading. For a while this was intermittent that is to say either the message would appear and then revert to normal or sometimes the...

Hi, Thanks everyone - AP seems to be working now. Cheers, Terry.

Hi 1.  D100 HSI page checked and found that there was no GPS connected (which was not a surprise) 2.  Continuity check of GPS to earth - good 3. Continuity check GPS COM1 out to D120 pin 19 - no connection. 4. I was about to pull out the wiring looms when I wondered if the COM2 had been used...

Hi, Thanks for those useful replies. I will do some electrical/continuity checks as soon as I can - a few days time. I had not knowingly set the altitude function so that was helpful. Thanks, Terry

Hi Thanks for the email. I did change the D120 input to NMEA as suggested but I'm sorry to say that it did not solve the problem. Still no lights (or operation) when the TRK or NAV button pressed on the AP74. At one point the D100 announcement said 'descend descend' for no valid reason...

Apologies for returning to a topic that has had previous appearances – but I’ve looked at as many threads as I can find but still not cracked the problem. Problem – Autopilot works OK on Alt and Heading but will not ‘see’ the output from the Garmin 296 GPS. Pressing the Trk or Nav buttons on...

Many thanks for the comments - investigating!

I have ony been able to conduct one flight to check out my newly installed AP (D100 + AP) - it seems to work OK in spite of a virtually permanent 'trim up' display in yellow. I've not had chance to investigate fully but I'm convinced that every time I engaged the AP the aircraft had been...

Hi, Many thanks for the comments and advice! G-FELX

Hi, I have D100/120 with HS34. I'm hoping to fit the Autopilot and the AP74 unit seems to be very useful. However there could be difficulty in finding enough panel space as well as the HS34 - so the obvious idea is to replace the HS43 with the AP74. Do I lose any functionality in this? As far...

The D120 manual says that the egt probes should be fitted to the exhausts of the two rear cylinders. The rear cylinder exhaust pipes on my Rotax 912 are relatively short and curved for almost all of their length - not a good fitting position. On the other hand the front cylinders have long...