TM 55-1520-240-23-1 EFFECTIVITY CODE    ECP/MWO NO. TITLE PRODUCTION (Serial Number) RETROFIT 55 ECP D185R1 Separate Fuel Control Relay Box Ground Connections 90-0202 and on MWO 1-1520-240-50-58 56 ECP D183 Helicopter Internal Cargo Handling System (HICHS) Ramp Centerline Attachment 81-23381 thru 91-0277 MWO 1-1520-240-50-59 57 ECP D175 Engine Aft Mount Adjustable Link 81-23381 thru 92-0302 MWO 1-1520-240-50-60 58 ECP D145R2 Improved Bolt/Bushing Connection N/A MWO 1-1520-240-50-69 59 ECP D198A1 Polyurethane  Paint for  CH-47D Aircraft — Attrition 60 ECP A098 Heads Up Display System (HUD) AN/AVS-7 81-23381 thru 91-0271 MWO 1-1520-240-50-56 61 ECP A0027 Global Positioning System (GPS) AN/ASN-149(V)1 81-23381 thru 92-0302 MWO 1-1520-240-50-68 62 ECP AEEMH-03009 Altitude Voice Warning System Radar Altimeter, AN/APN-209(V) 81-23381 thru 93-0934 MWO 1-1520-240-50-61 63 ECP D200 (Phase 2) Replace Lower Pitch Link Elastomeric Bearing 90-0180 and on MWO 1-1520-240-50-64 and MWO 1-1520-240-50-63 64 ECP D194R1 Stainless  Steel  Bellcranks  in Combining Transmission Area 81-23381 and on MWO 1-1520-240-50-65 65 ECP D168R1 Cockpit Remote Emergency Ramp Extension System 81-23381 thru 92-0309 MWO 1-1520-240-50-48 66 ECP D199 Nonmetallic Spline  Adapters  for Combining Transmission Cooling Fan Drive Shaft 76-18479 and 81-23381 thru 93-00934 MWO 1-1520-240-50-67 67 ECP D214R1 Aft Position Lights Switch 76-18479 and 81-23381 thru 93-00934 MWO 1-1520-240-50-75 68 ECP D216 Pressure Refueling Vacuum Relief Valve 76-18479 and 81-23381 thru 93-00934 MWO 1-1520-240-50-81 69 ECP D215 NVG Bezel 76-18479 and 81-23381 thru 93-00934 MWO 1-1520-240-50-71 70 ECP D210R1 Easily Replaceable Cabin Escape Hatch 76-18479 and 81-23381 thru 93-00934 MWO 1-1520-240-50-76 71 ECP END H030015 Installation of AN/ASN-128B Doppler GPS Navigation System 76-18479 and on MWO 1-1520-240-50-73 72 ECP D209 Installation of Radar Altimeter in Center Hook Compartment 76-18479 and 81-23381 thru 93-00934 MWO 1-1520-240-50-72 73 EJCH007016 ARC-220/KY-100 76-18479 and 81-23381 thru 93-00934 MWO 1-1520-240-50-74 74 ECP D218 714/FADEC 76-18479 and 81-23381 thru 93-00934 MWO 1-1520-240-50-83 75 ECP D219 Pylon Clamshell Door Latch 76-18479 and 81-23381 thru 93-00934 MWO 1-1520-240-50-80 76 ECP D220 (Pending) Pylon Platform Latch 76-18479 and 81-23381 thru 93-00934 MWO 1-1520-240-50-77 77 ECP D221 (Pending) Improved  Engine  Cross  Shaft Adapters 76-18479 and 81-23381 thru 93-00934 MWO 1-1520-240-50-XX 78 ECP D223 Cargo Hatch Handhold 76-18479 and 81-23381 thru 93-00934 MWO 1-1520-240-50-79 79 ECP D225 (Pending) Cad Bolts 76-18479 and 81-23381 thru 93-00934 Attrition 1-5