BP, If I recall I'm pretty certain the QNH at the time was 1011

Hi, I thought FL11 was actually FL110 (11000ft +-) or else it would have been given as 1100ft and not as FL011.

Have you tried hitting the encoder with a hammer? !

Not yet, but I'll take one along with me :ok:

Well, I finally got around, hopefully, to resolving this problem today, and it would appear the cause was not what I was expecting!

When I removed the encoder I heard something rattling inside, removed the cover and one of the small nuts which holds the pcb to the case had come adrift, when I looked closely at it I could see black deposits on the nut, the type I'd associate with arcing!

So I conclude the random altitude transmissions where a result of said nut shorting out on the pcb. Just hoping the shorting hasn't damaged the electronics :eek:

If the PCB is damaged the encoder is scrap, if it is an Ameri-King there is a good chance I have a used one that I could sell you.

Okay thanks, haven't tested it yet, but it is an Ameri-King, I might be in touch!

A and C

Never miss a trick, do you! ;)

Tim

And I'm sure A&C has an 8130-3 or an EASA Form 1 for the part.

8130 !
 

Hi wigglyamp, you are quite right I do have the 8130 for the unit, I checked my stock and it is not a used one but a new item that has become surplus to my requirements.

And I know the item is a genuine one because you supplied it to me.

Well done A&C - we wouldn't want bogus parts being installed :ok:.
I'm glad you could find the cert - since we relocated, heaven knows where we've stored the archives!