Vref Posted April 15, 2012 Report Posted April 15, 2012 Last week I was flying at 11K Ft and my KI256 showed a slight pitch down.though I was level, KFC150 engaged in ATT hold was trying to compensate with a climb...Below 8K Ft all was fine......Roll channel no problem I am afraid my KI256 is in for a bearing replacement...? It has about 600 Hrs since it last went in according logbooks... Any thoughts on these symptoms? thanks Luc
Awful_Charlie Posted April 19, 2012 Report Posted April 19, 2012 I would suspect the vacuum pump before the gyro, but it is odd the roll is not affected. If you fancy coming down to Habsheim I've got a spare KI256 you could do a test with. Good luck finding the cause Ben
Vref Posted April 19, 2012 Author Report Posted April 19, 2012 Hi Ben thanks for the offer. . My bird is in Hungary for some maintenance actions I am curious what the findings will be though if they can't identify the pump I may take on your offer, nice area for flying also... I read once an article that KI256 bearing degradation starts with a pitch down and after a while it will suddenly rather abrupt start indicating a unwanted roll...with all secondary effects if the A/Pis engaged at that time...... thanks rgds Luc
Recommended Posts