BLUF: Use enhanced procedures found in H-64-20-AMAM-03 with addendum to troubleshoot retrofitted EDECUs.
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
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.
To view and download the AMAM, with CAC in hand, visit:
Click on Consolidated Listings, select Aviation as the Record Type, H-64 as System Type and AMAM as Message Type. Then click Search. Results are listed in chronological order.