Anyone have any similar experiences and can offer how it was resolved? Twice it happened as I hit ALT/VS in climb although a rate of 500 FPM was selcted, and once after being level for about 5 minutes I had a sudden pitch-up for no apparent reason. Now that it was solved by an adjustment, I have now experienced sudden pitch-ups at 1500 FPM. Turned out the climb/descent had drifted out of alignment and was at zero descent rate when 200 feet above the selected altitude, so it didn't capture. It was fine until last year when it wouldn't capture the preselected altitude by about 200 feet. I have a 79 P210 with an S-TEC 55X that is about 12 years old. I wonder how this was resovled, as the post is two years old. Posted 2:49 AM (#633 - in reply to #566) Subject: Re: S-tec 55 Autopilot altitude hold problem Rob Howe owner of N210SH the first and only "super" Eagle produced Bob Nicolas said it might have something to do with where the system is measuring altitude/pressure and that ( If I understood correctly ) it could be connected to a different static port to solve the problem. Paul, I started having the same problem but in the 200 to 600 foot range. New user Posts: 2 Location: KSTS Santa Rosa, CA Posted 8:13 AM (#567 - in reply to #566) Subject: Re: S-tec 55 Autopilot altitude hold problem Refueled, took off and - everything back to normal!Īnyone had similar problems and know the cure? Tried pulling the circuit breaker to reset, even switching off the Avionics master to reset. Posted 2:34 PM (#566) Subject: S-tec 55 Autopilot altitude hold problemīut some flights it refuses to hold an altitude - dives or climbs at random at up to 1500fpm! S-tec 55 Autopilot altitude hold problem Jump to page : 1 Now viewing page 1
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