Pitufo
New Member
I have been using my D100 for more than 500 hrs without problems of any kind.
I decided to go for the AOA pitot.
I installed and calibrated it by the manual and everything was OK.
Suddenly, after some 5 or 6 flight hours, the altimeter started to indicate a descent, when I was flying leveled, and kept indicating a descent until it reached -1,200 ft where it stayed.
Since that day, the problem comes and goes.
Sometimes after a while flying (with the altimeter indicating a -1,200 ft altitude), the altimeter starts indicating a 2,000+ fpm climb until it reaches my actual altitude and starts indicating a correct altitude.
The correct reading lasts sometimes a few minutes, sometimes it lasts for the rest of the flight.
I tried reloading the latest firmware into my system (I have a D100, an AP74 and two servos), but the problem is still there.
I enclose a picture, where the EFIS altimeter indicates -1,200 ft and also a log of a flight I made last August, where you can see that, at the beginning of it, the altimeter was working right and then, without a warning, it started indicating a descent until it reached -1,200 ft and remaining there for the rest of the flight.
Since the problem appeared a while after I installed the AOA pitot, I disconnected the line coming from the AOA intake and left connected only the pitot and the static, but the problem is the same.
Please help me, is it a software bug?
Will I have to send the unit for repair?
I will appreciate whatever advice you might give me.
Thanks in advance.
I decided to go for the AOA pitot.
I installed and calibrated it by the manual and everything was OK.
Suddenly, after some 5 or 6 flight hours, the altimeter started to indicate a descent, when I was flying leveled, and kept indicating a descent until it reached -1,200 ft where it stayed.
Since that day, the problem comes and goes.
Sometimes after a while flying (with the altimeter indicating a -1,200 ft altitude), the altimeter starts indicating a 2,000+ fpm climb until it reaches my actual altitude and starts indicating a correct altitude.
The correct reading lasts sometimes a few minutes, sometimes it lasts for the rest of the flight.
I tried reloading the latest firmware into my system (I have a D100, an AP74 and two servos), but the problem is still there.
I enclose a picture, where the EFIS altimeter indicates -1,200 ft and also a log of a flight I made last August, where you can see that, at the beginning of it, the altimeter was working right and then, without a warning, it started indicating a descent until it reached -1,200 ft and remaining there for the rest of the flight.
Since the problem appeared a while after I installed the AOA pitot, I disconnected the line coming from the AOA intake and left connected only the pitot and the static, but the problem is the same.
Please help me, is it a software bug?
Will I have to send the unit for repair?
I will appreciate whatever advice you might give me.
Thanks in advance.
