What was found
UNABLE TO TRANSMIT ON HF2 NO CARRIER NO VOICE REF LOG PAGE 6970469 RH HF XCVR REPLACED, CMC TEST PASSED. STILL UNABLE TO TRANSMIT. MAINT MESSAGE 23-11072. PER FIM FOR MAINT. MSG 23-11072 SUGGEST TO REPLACE "RIGHT HF COUPLER" B2211203. HF COUPLER M&E 78-2311-9-9001 IS NOT AVAILABLE IN SFO. OK TO DEFER "RT HF" SYS PER MEL 2311H. OK TO DEFER R HF PER MEL. OPERATIONS ADVISED TO KEEP AIRCRAFT ON DOMESTIC ROUTE FOR REPAIR. ACP RPLCMNT OF RH COUPLER HF ANTENNA. REF DMC-B787-A-23-11-04-00B-720A-A. NEED TO ACP SYSTEM TEST REF: COUPLER, HF ANT OFF 78-2311-9-9001 7016 ON 78-2311-9-9001 8037 COUPLER, HF ANT OFF 78-2311-9-9001 7016 ON 0000 DMC-B787-A-23-11-00-00A-300B-A ROTABLE PARTS CHANGE WAS INDICATED - TT # 1265995 SN OFF 7016 STICKERS REMOVED FROM ALL TUNING CONTROL PANELS. PERFORMED HF SYSTEM OPERATIONAL TEST FOR RIGHT HF, COMMUNICATED WITH SFO ARINC. TRANSMISSION AND RECIEVE CHECKS CLEAR REF DMC-B787-A-23-11-00-00A-300B-A.