KI-256 horizon repair
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Update:
Installed the overhauled unit from Castleberry Instruments. This was a Mod 11 unit, with the buffered pitch/roll outputs.
It replaced another Mod 11 unit (the ex Mid Continent overhauled one which lasted only ~ 200hrs and which, I am now advised by another overhauler, has duff bearings).
It went in today. NO KFC-225 autopilot adjustments were needed (these are a major hassle, needing the $1400 bus extender, etc, and only one UK avionics shop can do these).
(except the trivial in-flight roll null, done from the front panel, to balance the left/right turn bank angles).
The flight test also went perfectly. I have never had a KI-256 which runs so straight.
The instrument was spot on, out of the box.
So anybody replacing a KI-256, go for Mod 11, and I can certainly recommend this company. Mod 11 cannot be retrofitted; you have to find a unit (post-1999) which has this factory fitted.
Installed the overhauled unit from Castleberry Instruments. This was a Mod 11 unit, with the buffered pitch/roll outputs.
It replaced another Mod 11 unit (the ex Mid Continent overhauled one which lasted only ~ 200hrs and which, I am now advised by another overhauler, has duff bearings).
It went in today. NO KFC-225 autopilot adjustments were needed (these are a major hassle, needing the $1400 bus extender, etc, and only one UK avionics shop can do these).
(except the trivial in-flight roll null, done from the front panel, to balance the left/right turn bank angles).
The flight test also went perfectly. I have never had a KI-256 which runs so straight.
The instrument was spot on, out of the box.
So anybody replacing a KI-256, go for Mod 11, and I can certainly recommend this company. Mod 11 cannot be retrofitted; you have to find a unit (post-1999) which has this factory fitted.
