Check Six – 2003: More about the -220E Engine Conversion

Posted on May 11, 2022 in Check Six

Right in the middle of our -220E engine conversion in 2003, a Time Compliance Technical Order (TCTO) came out in involving the Digital Electronic Engine Control (DEEC).

Yes, it controls the engine. 

Personal photographs – used with permission – click to enlarge

Normally this would be a Depot Level modification, but time they allowed the units to do it to save time. Lester Leung from Avionics was selected to perform the modifications.

The process – DEEC needed to be taken apart and three logic boards removed. The Erasable Programmable Read Only Memory (EPROM) was erased, and a new program burned into memory. The component boards were then reassembled, and leak checked.