Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -r756cb54714a8eaa0e876448f0783820988bc1fe9 -r18bfc0638c91f525dbb394e62187e2d8f8d4e74c
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 756cb54714a8eaa0e876448f0783820988bc1fe9)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 18bfc0638c91f525dbb394e62187e2d8f8d4e74c)
@@ -3448,10 +3448,14 @@
     // Create a message record
     blankMessage( &msg );
     msg.hdr.msgID      = MSG_ID_HD_USAGE_DATA;
-    msg.hdr.payloadLen = sizeof( HD_USAGE_INFO_RECORD_T );
+    msg.hdr.payloadLen = sizeof( F32 ) + sizeof( F32 ) + sizeof( U32 );
 
     // Fill message payload
-    memcpy( payloadPtr, &usageRecord, sizeof( HD_USAGE_INFO_RECORD_T ) );
+    memcpy( payloadPtr, &usageRecord.txTimeTotalHrs, sizeof( F32 ) );
+    payloadPtr += sizeof( F32 );
+    memcpy( payloadPtr, &usageRecord.txTimeSinceLastSrvcHrs, sizeof( F32 ) );
+    payloadPtr += sizeof( F32 );
+    memcpy( payloadPtr, &usageRecord.txLastStartTimeEpoch, sizeof( U32 ) );
 
     // Serialize the message (w/ sync, CRC, and appropriate CAN padding) and add serialized message data to appropriate comm buffer
     serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_2_UI, ACK_REQUIRED );