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NEWS | Aug. 5, 2022

Apache: Got Problems with EDECU?

BLUF: Use enhanced procedures found in H-64-20-AMAM-03 with addendum to troubleshoot retrofitted EDECUs.

Soldiers conduct 500 hours phase maintenance on an AH-64 Apache helicopter.
Photo by Charles Rosemond

 
Mechanics, if your unit has had the latest version of the enhanced digital electronic control unit (EDECU), NSN 2995-01-680-3143, PN 4155T12P09, installed on any of your aircraft, there’s a more in-depth troubleshooting procedure you need to follow. Start by double-checking each aircraft’s data plate to see if the P09 version EDECU has been installed.
 
Check data plate for part number
Check data plate for part number

If it has and there’s a fault or failure, Aviation Maintenance Action Message (AMAM) H-64-20-AMAM-03 instructs you to swap the EDECU with an adjacent engine to see if the problem follows. If it does, then replace the EDECU and submit a product quality deficiency report (PQDR).  When ordering a replacement EDECU use NSN 2995-01-680-3143 with a 2B advice code. This will ensure you get the P09 version.
 
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