# JASC 2310: HF Communications System

- Type: JASC system/component code (FAA)
- ATA chapter: 23 Communications
- Title in the code table: HF COMMUNICATION SYSTEM
- Service difficulty reports: 1,684
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=18
- Page: https://openairdocs.org/jasc/2310

## What it covers

The system parts and circuitry including the receiver, transmitter, and antenna used exclusively in the high frequency (HF) communications.

## Service difficulty reports (1,684, newest 50)

- [SDR SIMA20261015001](https://openairdocs.org/sdr/SIMA20261015001), Oct 15, 2026: Emb ERJ170100SE. RADIO. FAILED. INTERMITTENT RADIO FAILURE LOST COMM 1, COMM 2 INTO ORD. WE SAY STUCK MIC ON COMM 1. WE TRIED ALL MEANS TO CLEAR VIA YOK (N745JB)
- [SDR I5PA2026100528602](https://openairdocs.org/sdr/I5PA2026100528602), Oct 5, 2026: Boeing 757256. COUPLER. FAULTY. ETOPS SIGNIFICANT REPORT, HF SYSTEM INOPERATIVE. REPLACED HF COUPLER IAW AMM. (N286GB)
- [SDR I5PA2026100528601](https://openairdocs.org/sdr/I5PA2026100528601), Oct 5, 2026: Boeing 757256. TRANSCEIVER. FAULTY. ETOPS SIGNIFICANT REPORT HF SYSTEM INOPERATIVE. REPLACED HF TRANSCEIVER PER AMM. (N286GB)
- [SDR IPXA2026091512611](https://openairdocs.org/sdr/IPXA2026091512611), Sep 12, 2026: Boeing 76734AF. ANTENNA. DAMAGED. FOUND V.S.T HF ANTENNA (321E) EROSION. REMOVE THE DAMAGED MATERIALS AND CLEAN. BOND THE REPAIR PLIES WITH FILM ADHESIVE  (N316UP)
- [SDR ASAA2026081966403](https://openairdocs.org/sdr/ASAA2026081966403), Aug 19, 2026: Airbus A330343. COUPLER. FAILED. HF 1 FAILED RO COUPLE ATB WITH HF2 PREVIOUSLY MEL'D. FOLLOWING ATB AND HF1 TROUBLESHOOTING, HF1 ONCE AGAIN FAILED TO COU (N5897K)
- [SDR I5PA2026081719305](https://openairdocs.org/sdr/I5PA2026081719305), Aug 17, 2026: Boeing 757223. COUPLER. FAULTY. ETOPS : RIGHT HF SYSTEM INOPERATIVE. REPLACED RIGHT HF COUPLER PER APPLICABLE AMM. (N193AN)
- [SDR YENA2026081700681](https://openairdocs.org/sdr/YENA2026081700681), Aug 15, 2026: Airbus A321271NX. HF COMM. FAULTED. FLT # 423, JFK-LAX. (ETOPS) "HF 1 INOP WILL NOT TUNE ( HIGH FREQUENCY (HF) COMMUNICATION SYSTEM (D-LRCS) HF 1 )." (SUPPL (N2193J)
- [SDR YENA2026081400671](https://openairdocs.org/sdr/YENA2026081400671), Aug 12, 2026: Airbus A321271NX. HF COMM. FAULTED. FLT 1023, JFK-LAX. (ETOPS) "HF RADIO SLOW TO TUNE GOOD RECEPTION BUT MOST TRANSMISSIONS WERE CLICKING AFTER A SECOND OR  (N2188J)
- [SDR YENA202608140060](https://openairdocs.org/sdr/YENA202608140060), Aug 12, 2026: Airbus A321271NX. HF COMM. FAULTED. FLT # 1023, JFK-LAX. (ETOPS) "HF RADIO SLOW TO TUNE GOOD RECEPTION BUT MOST TRANSMISSIONS WERE CLICKING AFTER A SECOND O (N2188J)
- [SDR YENA2026081200668](https://openairdocs.org/sdr/YENA2026081200668), Aug 11, 2026: Airbus A321271NX. TRANSCEIVER. FAULTED. FLT 1079, BOS-EDI. (ETOPS) "WHEN ATTEMPTING TO TUNEHF-1, THERE IS NO TUNE WHEN ANTENNA IS TURNING AND AUDIO CUTS OUT FOR (N2193J)
- [SDR CALA2026081418627](https://openairdocs.org/sdr/CALA2026081418627), Aug 10, 2026: Boeing 7378. TRANSCEIVER. FAULTED. HF RADIO TRANSMISSION PROBLEM BOTH HF 1 AND 2 WILL NOT TUNE OR TRANSMIT IN FLIGHT. WORKS FOR APPROX 30 MINUTES AND THEN  (N27261)
- [SDR CALA2026081218523](https://openairdocs.org/sdr/CALA2026081218523), Aug 8, 2026: Boeing 7378. TRANSCEIVER. FAULTED. HF RADIO TRANSMISSION PROBLEM, COULD NOT TRANSMIT ON HF 1. ATTEMPTED HF1 SYSTEM TEST. HF 1 WOULD NOT TRANSMIT. PLACED ON (N47280)
- [SDR IPXA2026080792047](https://openairdocs.org/sdr/IPXA2026080792047), Aug 3, 2026: Boeing 76734AF. ANTENNA. ERODED. FOUND V.S.T HF ANTENNA (321E) EROSION. REMOVE THE EROSION MATERIALS AND CLEAN IAW SRM 55-30-01-2R-6 REFER TO SRM 51-70-0 (N331UP)
- [SDR CALA2026070517556](https://openairdocs.org/sdr/CALA2026070517556), Jul 4, 2026: Boeing 7379. TRANSCEIVER. FAULTED. ACFT RETURNED TO FIELD DUE BOTH HF RADIO ISSUES. CAPT NOTED ON D EBRIEF THAT ON CLIMBOUT, THEY BEGAN TO CHECK BOTH HF ON (N37554)
- [SDR CALA2026033114986](https://openairdocs.org/sdr/CALA2026033114986), Mar 28, 2026: Boeing 7878. TRANSCEIVER. FAULTED. LEFT HF RADIO TRANSMISSION PROBLEM. LEFT HF RADIO DOES NOT TRANSMIT LOOKING AT TIMELINE OF FAULTS BOTH 23-11071 AND 23-1 (N27901)
- [SDR YENA2026032300318](https://openairdocs.org/sdr/YENA2026032300318), Mar 21, 2026: Airbus A321271NX. RADIO. FAULTED. FLT # 604 YVR-JFK (ETOPS). "ETOPS HF RADIO SIGNIFICANT SYSTEM OPERATIONAL REVIEW FLIGHT IS REQUIRED (SSOR) ( ETOPS SIGNI (N2193J)
- [SDR YENA2026031600314](https://openairdocs.org/sdr/YENA2026031600314), Mar 20, 2026: Airbus A321271NX. COUPLER. FAILED. FLT # 31 BOS -AMS (ETOPS). HF 1 RADIO RECEPTION AND TRANSMISSION VERY WEAK, BARELY USABLE, HIGH FREQUENCY (HF) COMMUNICA (N4076J)
- [SDR IPXA2026031284337](https://openairdocs.org/sdr/IPXA2026031284337), Mar 2, 2026: Boeing 767300. TRANSMITTER. INOPERATIVE. AIR TURN BACK, UNABLE TO RECEIVE HF RADIO TRANSMISSIONS ON EVERY HF FREQ WE COULD FIND. CONTACTED DISPATCH, ATB REQUIRED (N384UP)
- [SDR IPXA2026031284304](https://openairdocs.org/sdr/IPXA2026031284304), Mar 2, 2026: Boeing 767300. TRANSMITTER. INOPERATIVE. ATB, UNABLE TO RECEIVE HF RADIO TRANSMISSIONS ON EVERY HF FREQ WE COULD FIND. CONTACTED DISPATCH, ATB REQUIRED. PRIOR TO (N384UP)
- [SDR IPXA2026030384337](https://openairdocs.org/sdr/IPXA2026030384337), Mar 2, 2026: Boeing 767300. HF COMM. FAULTED. UNABLE TO RECEIVE HF RADIO TRANSMISSIONS ON EVERY HF FREQ WE COULD FIND. CONTACTED DISPATCH, ATB REQUIRED. PRIOR TO DEPT (N384UP)
- [SDR IPXA2026030384304](https://openairdocs.org/sdr/IPXA2026030384304), Mar 2, 2026: Boeing 767300. HF COMM. FAULTED. ATB, UNABLE TO RECEIVE HF RADIO TRANSMISSIONS ON EVERY HF FREQUENCY WE COULD FIND. CONTACTED DISPATCH, ATB REQUIRED. PRI (N384UP)
- [SDR UIEA2025100401256](https://openairdocs.org/sdr/UIEA2025100401256), Oct 4, 2025: Boeing 767375. HF COMM. ABNORMAL. BOTH HF COMM RADIO INOP AND SELCAL INOP(<P>T/S WITH FIM 23-11 FT 804. RESECURED CONNECTIONS AT HF ANTENNA. OPS CHK GOOD  (N649GT)
- [SDR HALA20250804240](https://openairdocs.org/sdr/HALA20250804240), Aug 1, 2025: Airbus A330343. RADIO. FAULTED. ATB - DUE CONTINUES TONE & UNABLE TO TUNE HF 1 & 2. REPLACED HF #1 COUPLER PER AMM 23-11-36. OPS CHECK GOOD. A/C OKAY FO (N5897K)
- [SDR CALA2025073107116](https://openairdocs.org/sdr/CALA2025073107116), Jul 30, 2025: Boeing 757324. TRANSCEIVER. FAILED. RADIO TRANSMIT ON ICAS OBSERVED NO AUDIO FROM HF RIGHT. CREW REQUESTED MAINTENANCE UPON ARRIVAL. WHILE EICAS MESSAGE WAS (N75851)
- [SDR CALA2025071806717](https://openairdocs.org/sdr/CALA2025071806717), Jul 17, 2025: Boeing 7379. TRANSCEIVER. FAULTED. NO RECEPTION ON BOTH HF RADIOS SENSOR SET TO 100. OPS CHECKED HF COM SYS REF AMM 23-11-00/501. OPS CHECK GOOD. ABLE TO R (N47569)
- [SDR YENA2025063000660](https://openairdocs.org/sdr/YENA2025063000660), Jun 30, 2025: Airbus A321271NX. RADIO. FAULTED. FLT#841, JFK-DUB. (ETOPS) "UNABLE TO RECEIVE SELCAL AFTER MULTIPLE ATTEMPTS WITH NY RADIO AND GANDER OCEANIC. WE HAD TO  (N2169J)
- [SDR NACA2025060400001](https://openairdocs.org/sdr/NACA2025060400001), Jun 4, 2025: Boeing 7673BG. TRANSCEIVER. FAILED. UNABLE TO TRANSMIT ON LEFT HF RADIO. REMOVED AND REPLACED LH HF TRANSCEIVER IAW B767 AMM 23-11-00 OPS CHECKED SATISFACTO (N566NC)
- [SDR NACA20250601001](https://openairdocs.org/sdr/NACA20250601001), Jun 1, 2025: Boeing 7673BG. TRANSCEIVER. FAILED. HF RADIO #1 DOES NOT TX. CAN RX OK. REMOVED AND REPLACED LH HF TRANSCEIVER PER AMM 23-11-03 OPS CHECK GOOD. #1 HF TRANSM (N566NC)
- [SDR NACA2025053100001](https://openairdocs.org/sdr/NACA2025053100001), May 31, 2025: Boeing 7673BG. RADIO. WEAK. LEFT HF RADIO ON FULL VOLUME IS WEAK AND UNREADABLE. CAN HEAR THE RADIO IS WORKING BUT NOT LOUD ENOUGH TO UNDERSTAND. PE (N566NC)
- [SDR NACA2025050600001](https://openairdocs.org/sdr/NACA2025050600001), May 6, 2025: Boeing 7673BG. HF COMM. FAULTED. RIGHT HF TRANSMIT INOP IN FLIGHT. PERFORMED HF COMM SYSTEM BITE PROCEDURE IAW B763 FIM 23-11 FT 804 NO DEFECTS NOTED. (N565NC)
- [SDR NACA2025040500003](https://openairdocs.org/sdr/NACA2025040500003), Apr 5, 2025: Boeing 7673BG. HF COMM. FAULTED. HF RADIO #2 CANNOT TX, CAN HEAR AUDIO. PERFORMED OPS TEST OF #2 HF RADIO PER AMM 23-11-00 OPS TEST GOOD. (N565NC)
- [SDR NACA2025040500002](https://openairdocs.org/sdr/NACA2025040500002), Apr 5, 2025: Boeing 7673BG. HF COMM. FAULTED. HF RADIO #1 CANNOT TX, CAN HEAR AUDIO BUT CANNOT HEAR KEYING WHEN PUSHING PTT. PERFORMED OPS TEST OF #1 HF RADIO PER AMM (N565NC)
- [SDR NACA2025031720001](https://openairdocs.org/sdr/NACA2025031720001), Mar 12, 2025: Boeing 7673BG. RADIO. MALFUNCTIONED. BOTH HF RADIOS NOT BROADCASTING ONLY RECEIVING AT LAST WAYPOINT. PERFORMED OPS TEST OF BOTH LH AND RH HF RADIOS, OPS CHE (N30565)
- [SDR I5PA2025030319301](https://openairdocs.org/sdr/I5PA2025030319301), Mar 3, 2025: Boeing 757223. COUPLER. FAULTED. FLT NO: N/A (MX INSP) ESI - LH HF INOP. R/R LH HF COUPLER PER AMM 23-11-01. OPS CHECK GOOD. (N193AN)
- [SDR IPXA2025030451226](https://openairdocs.org/sdr/IPXA2025030451226), Feb 20, 2025: Boeing 76734AF. TRANSCEIVER. FAULTED. BOTH HF UNABLE TRANSMIT. OPS CHECK OK ON GND, SATCOM INOP ALSO. RESULTED IN ATB. ++ C/W FIM T/S 23-11-00. R&R HF TRANSCE (N314UP)
- [SDR HALA20250121024](https://openairdocs.org/sdr/HALA20250121024), Jan 18, 2025: Airbus A330243. RADIO. MALFUNCTIONED. ETOPS - #1 HF RADIO UNABLE TO CHANNELIZE. TRIED SEVERAL DIFFERENT FREQUENCIES. REMOVED AND REPLACED HF 1 COUPLER PER AMM (N375HA)
- [SDR YENA2025012100092](https://openairdocs.org/sdr/YENA2025012100092), Jan 18, 2025: Airbus A321271NX. HF COMM. OUT OF ADJUST. FLT#615, JFK-SFO. (ETOPS) ' HF COMMUNICATIONS WERE GOOD SELCAL CHECK FAILED BOTH RADIOS HF 1 & HF2 TRIED MULT FREQ; PER  (N4080J)
- [SDR NACA2024121600001](https://openairdocs.org/sdr/NACA2024121600001), Dec 16, 2024: Boeing 7673BG. CONTROL HEAD. FAILED. LH HF CONTROL HEAD 1 DIGIT INOP. REMOVED AND REPLACED LH HF CONTROL HEAD PER 767 AMM 23-11-02 OPS CHECK GOOD. (N566NC)
- [SDR IPXA2024112569925](https://openairdocs.org/sdr/IPXA2024112569925), Nov 24, 2024: Boeing 76734AF. HF COMM. MALFUNCTIONED. *AIR TURN BACK* TRANSMISSION FROM ANY CREW POSITION ON LHF NOT POSSIBLE. LH HF OPS NML REF AMM 23-11-00. (N305UP)
- [SDR HALA20241112322](https://openairdocs.org/sdr/HALA20241112322), Nov 9, 2024: Airbus A330243. TRANSCEIVER. INOPERATIVE. ETOPS-HF RADIOS UNABLE TO TX. REMOVED AND REPLACED HF1 TRANSCEIVER PER AMM 23-11-33. BITE TEST OF HF TRANSCIEVER GOOD. O (N382HA)
- [SDR HALA20241101307](https://openairdocs.org/sdr/HALA20241101307), Oct 31, 2024: Airbus A330243. TRANSCEIVER. FAULTED. ETOPS - HF 1 FAULTING. REMOVED AND REPLACED HF 1 TRANSCEIVER PER AMM 23-11-33/401. OPS TEST AND BITE OK. OK FOR SVC. (N382HA)
- [SDR NACA2024102500002](https://openairdocs.org/sdr/NACA2024102500002), Oct 25, 2024: Boeing 767323. HF COMM. MALFUNCTIONED. HF#2 CAN RECEIVE BUT NOT TRANSMIT. OPS CHECK HF#2 PER AMM 23-11-00, OPS CHECK GOOD ON GROUND. (N379CX)
- [SDR NACA2024101000001](https://openairdocs.org/sdr/NACA2024101000001), Oct 10, 2024: Boeing 7673BG. CONTROL PANEL. FAILED. RH HF FREQ SELECT PANEL DISPLAY INOP. REPLACED RH HF FREQ SELECT PANEL IAW AMM (N565NC)
- [SDR NACA2024100900001](https://openairdocs.org/sdr/NACA2024100900001), Oct 9, 2024: Boeing 7673BG. CONTROL PANEL. FAILED. RH HF DOES NOT TRANSMIT OR RECEIVE. REMOVED AND REPLACED HF COMM CONTROL PANEL IAW AMM 23-11-02. PART IS UNKNOWN TO TRAX (N565NC)
- [SDR NACA2024091700001](https://openairdocs.org/sdr/NACA2024091700001), Sep 17, 2024: Boeing 7673BG. HF COMM. FAULTED. RH HF DOES NOT TRANSMIT AFTER TUNE TONE IN FLIGHT ONLY. DEFERRED PER MEL 23-11-01. RERACKED RH HF TRANSCEIVER PER AMM 23 (N565NC)
- [SDR I5PA2024091268801](https://openairdocs.org/sdr/I5PA2024091268801), Sep 12, 2024: Boeing 757230. TRANSCEIVER. INOPERATIVE. FLT NO: N/A (MX INSP.) ESI - RT HF INOP. R/R RT HF COMM TRANSCEIVER PER AMM 23-11-03. (N688SL)
- [SDR NACA2024090400002](https://openairdocs.org/sdr/NACA2024090400002), Sep 4, 2024: Boeing 7673BG. RADIO. FAULTED. HF RADIO RHS DOES NOT TRANSMIT, RECEIVE IS OK. DEFERRED PER MEL 23-11-01-028 CAT C. PERFORMED OPS CHECK ON RH HF SYS PER (N565NC)
- [SDR CALA2024083000515](https://openairdocs.org/sdr/CALA2024083000515), Aug 27, 2024: Boeing 737924ER. AUDIO PANEL. FAULTY. BOTH HF1 HF2 RADIOS UNABLE TO TXMT - WE CAN RECEIVE OK - ALL FRE QS AND MODES OF TXMT SAMETRIED PLANE TO PLANE HF RADIO  (N27421)
- [SDR I5PA2024082958803](https://openairdocs.org/sdr/I5PA2024082958803), Aug 25, 2024: Boeing 757230. TRANSCEIVER. FAULTY. FLT NO: N/A (MX INSP.) ESI - UNABLE TO TRANSMIT ON L HF. R/R LEFT HF TRANSCEIVER AND PER AMM 23-11-03. OPS CHECK NORMAL. (N888LT)
- [SDR HALA20240826241](https://openairdocs.org/sdr/HALA20240826241), Aug 25, 2024: Airbus A330243. COUPLER. FAULTED. ETOPS - HF#1 ANTENNA WILL NOT TUNE. PERFORMED TSM 23-11-00-810-813-1. BITE TESTSHOW 231133 HF1 CPLR (3RE1) CLASS 1 FAULT (N378HA)

All 1,684: https://openairdocs.org/jasc/2310/reports.md

## Other codes in chapter 23

- [JASC 2300](https://openairdocs.org/jasc/2300): Communications System (1,971 reports)
- [JASC 2311](https://openairdocs.org/jasc/2311): UHF Communications System (69 reports)
- [JASC 2312](https://openairdocs.org/jasc/2312): VHF Communications System (1,271 reports)
- [JASC 2320](https://openairdocs.org/jasc/2320): Data Transmission Auto Call (106 reports)
- [JASC 2330](https://openairdocs.org/jasc/2330): Entertainment System (802 reports)
- [JASC 2340](https://openairdocs.org/jasc/2340): Interphone/Passenger Announcement (PA) System (755 reports)
- [JASC 2350](https://openairdocs.org/jasc/2350): Audio Integrating System (627 reports)
- [JASC 2360](https://openairdocs.org/jasc/2360): Static Discharge System (104 reports)
- [JASC 2370](https://openairdocs.org/jasc/2370): Audio/Video Monitoring (219 reports)
- [JASC 2397](https://openairdocs.org/jasc/2397): Communications System Wiring (430 reports)

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