What was found
FLT # 604 YVR-JFK (ETOPS). "ETOPS HF RADIO SIGNIFICANT SYSTEM OPERATIONAL REVIEW FLIGHT IS REQUIRED (SSOR) ( ETOPS SIGNIFICANT SYSTEM OPERATIONAL REVIEW FLIGHTS (SSOR) ) (ACP # 3 WAS REPLACED WITH UPGRADED P/N AND HF CHECKS REQUIRED). TASK CARD A320-23-1B19-01.;ADVISED BY PILOT THAT THE OPS TEST OF THE HF SYS HAS BEEN ACOMPLISHED IAW AMM 23-11-00, NO FAULT HAS BEEN NOTED, THIS CLEAR MDDR 612524, MX-4 UPDATED.