# JASC 2312: VHF Communications System - Type: JASC system/component code (FAA) - ATA chapter: 23 Communications - Title in the code table: VHF COMMUNICATION SYSTEM - Service difficulty reports: 1,271 - FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=19 - Page: https://openairdocs.org/jasc/2312 ## What it covers The system parts and circuitry including the receiver, transmitter, and antenna used exclusively for very high frequency (VHF) communications. ## Service difficulty reports (1,271, newest 50) - [SDR SWAA2026092253284](https://openairdocs.org/sdr/SWAA2026092253284), Sep 14, 2026: Boeing 7377H4. COMMS UNIT. MALFUNCTIONED. LOSS OF COMMS 1/2 AND ACARS, FLYING THROUGH WEATHER. PERFORMED STATIC DISCHARGER INSPECTION IAW AMM 23-61-00, NO DEFECTS (N464WN) - [SDR CALA2026072317956](https://openairdocs.org/sdr/CALA2026072317956), Jul 20, 2026: Boeing 757324. TRANSCEIVER. FAULTED. EICAS MSG.-DATALINK LOST DISPLAYED VHF DATALINK LOST ACARS NO COMM DEBRIEFED CREW AND WAS TOLD 1.5 HOURS INTO THE FLT GO (N57857) - [SDR J7SA2026030200475](https://openairdocs.org/sdr/J7SA2026030200475), Feb 19, 2026: Bombdr BD1001A10. VHF COMM. SMOKE. AIR TURN BACK DUE TO SMOKE IN CABIN DURING CLIMB BETWEEN 12000 AND 15000 FT. CREW NOTED THAT THE ODOR SEEMED TO BE COMIN (N526FX) - [SDR SWIA2025111000005](https://openairdocs.org/sdr/SWIA2025111000005), Nov 5, 2025: Cndair CL6002C10. ANTENNA. DAMAGED. COMPLY WITH M-93 CRJ700-53-25-01 AND EA11125 REV A FOR THE MAJOR REPAIR TO THE FUSELAGE VHF ANTENNA, STA 629-645, STR 1L (N614QX) - [SDR SWIA2025110600005](https://openairdocs.org/sdr/SWIA2025110600005), Nov 5, 2025: Cndair CL6002C10. ANTENNA. DAMAGED. COMPLY WITH M-93 CRJ700-53-25-01 AND EA11125 REV A FOR THE MAJOR REPAIR TO THE FUSELAGE/VHF ANTENNA/STA 629-645, STR 1L- (N614QX) - [SDR 2025FA0000743](https://openairdocs.org/sdr/2025FA0000743), Nov 5, 2025: Beech B300. VHF COMM. FAULTED. ON DEPARTURE FROM ONZ WE COULD NOT REACH DETROIT DEPARTURE. WE CONTINUED ON RUNWAY HEADING UP TO 3,000FT PER OUR CLEARAN (N946CG) - [SDR SWAA2025090812521](https://openairdocs.org/sdr/SWAA2025090812521), Sep 8, 2025: Boeing 7378. TRANSCEIVER. SMOKE. SHORTLY AFTER TAKEOFF; FAINT SMELL OF SMOKE WAS OBSERVED. IT WASN'T ELECTRICAL. AS WE ASSESSED IT; THE SMOKE DISSIPATED (N8956Q) - [SDR AALA202509100362](https://openairdocs.org/sdr/AALA202509100362), Sep 7, 2025: Boeing 737823. RADIO. INTERMITTENT. AIRCRAFT WAS NOT GROUNDED: AN EMERGENCY WAS DECLARED DUE TO THE FLIGHT CREW REPORTING THAT COMMUNICATION RADIO #1 AND #2 (N924AN) - [SDR HALA20250908274](https://openairdocs.org/sdr/HALA20250908274), Sep 5, 2025: Airbus A330243. TRANSCEIVER. FAULTED. ETOPS - COM VHF3 DATA FAULTS. REMOVED AND REPLACED VHF #3 TRANSCEIVER PER AMM 23-12-33. (N392HA) - [SDR DALA2025081906218](https://openairdocs.org/sdr/DALA2025081906218), Aug 14, 2025: Airbus BD5001A11. INTERFACE UNIT. FAULTED. ATB DUE TO LOSS OF VHF AND INTERPHONE COMMUNICATIONS FROM THE FLIGHT DECK. REPLACED RADIO INTERFACE UNIT (RIU)1 AND THE (N327DU) - [SDR JJBA20251111061](https://openairdocs.org/sdr/JJBA20251111061), Aug 3, 2025: Emb EMB145XR. ANTENNA. CORRODED. CORROSION FOUND UNDER VHF 2 ANTENNA AT FRAMES 21-22. BLENDED AREA. APPLIED ALODINE TO THE AIRCRAFT SKIN AT VHF 2 ANTENNA (N12135) - [SDR QMLA2025072620077](https://openairdocs.org/sdr/QMLA2025072620077), Jul 24, 2025: Urocop EC135T2. VHF COMM. FAULTED. #1 VHF RADIO STOPPED TRANSMITTING. SHORTLY AFTER, DURING LEVEL FLIGHT, IFR, 6000MSL, 120KN, ON ATC VECTOR IN HEADING MOD (N831ME) - [SDR IPXA2025062519505](https://openairdocs.org/sdr/IPXA2025062519505), Jun 20, 2025: Boeing 74744AF. VHF COMM. INOPERATIVE. DURING CRUISE EICAS ALERT THEN STATUS MESSAGE EQUIPMENT SMOKE ALONG WITH VHF DATA OFF RESULTED IN ATB. REPLACED C VHF TR (N573UP) - [SDR IPXA2025062019505](https://openairdocs.org/sdr/IPXA2025062019505), Jun 20, 2025: Boeing 74744AF. TRANSCEIVER. FAULTED. ATB, DURING CRUISE EICAS ALERT THEN STATUS MESSAGE EQUIPMENT SMOKE ALONG WITH VHF DATA OFF RESULTED IN ATB. REPLACED C V (N573UP) - [SDR IPXA2025060660934](https://openairdocs.org/sdr/IPXA2025060660934), Jun 5, 2025: Boeing 76734AF. RADIO. INOPERATIVE. **ATB**RADIO FAILURE BOTH L/R VHF RADIOS HAVE LOUD SIDE TONE, UNABLE TO RECEIVE -TRANSMIT AND RECEIVE REGAINED CAPTAIN R (N350UP) - [SDR UIEA2025052100653](https://openairdocs.org/sdr/UIEA2025052100653), May 21, 2025: Boeing 76731B. ANTENNA. DAMAGED. CENTER VHF COMM ANTENNA DAMAGE.(

REPLACED CENTER VHF COMM ANTENNA LOWER FUSELAGE. PERFORM OPS TEST, TEST OK IAW AMM 23 (N664GT) - [SDR 2025FA0000095](https://openairdocs.org/sdr/2025FA0000095), Feb 5, 2025: Boeing 7378. ANTENNA. GROUND DAMAGE. VHF ANTENNA AND FUSELAGE DAMAGE BY GROUND HANDLING EQUIPMEN - [SDR ABXA20250127024](https://openairdocs.org/sdr/ABXA20250127024), Jan 27, 2025: Boeing 767375. TRANSCEIVER. MALFUNCTIONED. "DURING TAXI CREW REPORTED LEFT COMM INOP , A/C RETURNED TO GATE (BTB) AND MTX GROUNDED A/C , MTX TROUBLESHOT AND REMOVE (N1709A) - [SDR 2024FA0000971](https://openairdocs.org/sdr/2024FA0000971), Dec 18, 2024: Textrn TEXTRON700. ANTENNA. ERODED. VHF COMM. ANTENNA LEADING EDGE EROSION. (N836QS) - [SDR UIEA2024110101078](https://openairdocs.org/sdr/UIEA2024110101078), Oct 31, 2024: Boeing 7673S1. ANTENNA. DETERIORATED. R/H VHF ANTENNA DETERIORATED(

REMOVED AND REPLACED R/H VHF ANTENNA MO246 & PERFORMED OPERATIONAL TEST, TEST O (N640GT) - [SDR CALA2024071502016](https://openairdocs.org/sdr/CALA2024071502016), Jul 15, 2024: Boeing 737924ER. ANTENNA. DAMAGED. PDA 2 SUPERTUG REPORTED DAMAGE TO #3 VHF ANTENNA UPON AIRCRAFT ARRIVAL. REMOVED AND REPLACED #3 VHF ANTENNA AS PER AMM 2 (N39423) - [SDR UIEA2024070400578](https://openairdocs.org/sdr/UIEA2024070400578), Jul 7, 2024: Boeing 76736N. ANTENNA. CORRODED. CORROSION ON UPPER FORWARD VHF ANTENNA(

REPLACEMENT OF UPPER FWD VHF ANTENNA  WAS PERFORMED IAW AMM 23-12-03- 000 (N1093A) - [SDR DALA2024062606515](https://openairdocs.org/sdr/DALA2024062606515), Jun 24, 2024: Airbus A320212. ANTENNA. INFLT SEPARATION. SHIP 3266 DISC: SHORTLY AFTER T/O VHF1 WENT INOP NO INDICATION OTHER THAN UNABLE TO HEAR OR TRANSMIT. C/A: UPON ARRIVAL (N366NW) - [SDR 2024F00098](https://openairdocs.org/sdr/2024F00098), Mar 21, 2024: Cessna 441. ANTENNA. INFLT SEPARATION. DURING CRUISE PHASE OF FLIGHT FROM SNP TO ANC PILOT FELT VIBRATION/BUFFETING AND SLOWED HIS AIRSPEED DOWN AND DESCENDED (N11MM) - [SDR SIMA20240131001](https://openairdocs.org/sdr/SIMA20240131001), Jan 31, 2024: Emb ERJ170100SE. VHF COMM. UNSERVICEABLE. ACARS NO COMM IN FLIGHT. S COPE *** HISTORY: 1/16 CND - ORD*** AHEAD PRO IS. NOT FLAGGING ANY. PERFORM FIM TASK 23-24-00 (N635RW) - [SDR 2023F00321](https://openairdocs.org/sdr/2023F00321), Nov 8, 2023: Cessna 208B. RADIO. ABNORMAL. WHILE FLYING AT 6000 HEADING TO DESTINATION ABOUT 20 MILES EAST OF KMWL THE COM/NAV # 2 STARTED SPARKING AND THEN THERE (N162SA) - [SDR AALA202308078700](https://openairdocs.org/sdr/AALA202308078700), Aug 4, 2023: Airbus A320*. AMU. INTERMITTENT. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO MEM DUE TO COMMUNCATION SINGLE PTT STUCK. (N559UW) - [SDR CALA2023072102309](https://openairdocs.org/sdr/CALA2023072102309), Jul 19, 2023: Airbus A319132. ANTENNA. MISSING. PDA 1 PDA FOUND #2 VHF LOWER ANTENNA MISSING INTO DEN. #2 VHF ANTENNA REPLACED PER AMM 23-12-11-400-001-A AND ACCOMPLISH (N877UA) - [SDR AALA202302062187](https://openairdocs.org/sdr/AALA202302062187), Feb 3, 2023: Airbus A300*. ANTENNA. MISSING. AIRCRAFT WAS GROUNDED: AIRCRAFT ARRIVED IN CLT WITH VHF ANTENNA BROKEN OFF AND MISSING ON AFT BELLY. THE BASE OF THE ANT (N543UW) - [SDR DALA2023012600669](https://openairdocs.org/sdr/DALA2023012600669), Jan 24, 2023: Boeing 737832. TRANSCEIVER. ODOR. (LOG 9047688) JUST PRIOR TO STARTING APPROACH AT APPROXIMATLY 5200' MSL THE FO AND I SMELLED A ACRID SMELL LIKE ELECTRIC (N3766) - [SDR 7C7A2023011980004](https://openairdocs.org/sdr/7C7A2023011980004), Jan 18, 2023: Dhav DHC8106. ANTENNA. FAILED. AFTER DEPARTING ANC CREW DISCOVERED #1 COM NOT WORKING. R&R #1 VHF COMM ANTENNA (N891EA) - [SDR OEJA2023010900020](https://openairdocs.org/sdr/OEJA2023010900020), Jan 6, 2023: Beech 400A. VHF COMM. INOPERATIVE. DURING THE ILS 24 APPROACH IN TO KMDG WE LOST RADIO COMMUNICATION DURING THE LANDING AT THE TIME WE CONTINUE (BEING THE (N420FL) - [SDR ENHA LP229029](https://openairdocs.org/sdr/ENHA%20LP229029), Aug 23, 2022: Cessna 207A. CIRCUIT BREAKER. TRIPPED. PILOT REPORTS AUDIO CIRCUIT BREAKER POPPED, SMOKE. MAINTENANCE INSPECTED AUDIO PANEL ELECTRICAL SYSTEM. NO DEFECTS NOTED (N9651M) - [SDR DALA2022082305700](https://openairdocs.org/sdr/DALA2022082305700), Aug 22, 2022: Boeing 757232. NONE. NONE. SHIP 6704 -ATB- DUE TO DUAL VHF FAILURE. CORRECTIVE ACTION: REPLACED OBS HAND MIC AND F/O'S FREQ SELECT PANEL DUE TO STU (N6704Z) - [SDR DALA2022070804766](https://openairdocs.org/sdr/DALA2022070804766), Jul 6, 2022: Boeing 737832. NONE. NONE. SHIP 3721 -MISC- DUE TO LOSS OF VHF COMMUNICATIONS ON APPROACH TO JFK. CORRECTIVE ACTION: REPLACED REMOTE ELECTRONICS UN (N391DA) - [SDR AXSA202206170004](https://openairdocs.org/sdr/AXSA202206170004), Jun 15, 2022: Beech C99. SWITCH. STUCK. AFTER DEPARTURE FROM MHT, THE PILOT ATTEMPTED ROUTINE RADIO COMMUNICATIONS. WHEN THE PUSH-TO-TALK SWITCH WAS RELEASED IT (N55RP) - [SDR AALA202206147711](https://openairdocs.org/sdr/AALA202206147711), Jun 13, 2022: Airbus A319132. TRANSCEIVER. DEFECTIVE. AIRCRAFT WAS GROUNDED: VHF 1 BECAME UNUSABLE DURING DESCENT. CONSTANT POPPING SOUND AND FREQUENT INABILITY TO HEAR ATC. (N819AW) - [SDR AALA202206148641](https://openairdocs.org/sdr/AALA202206148641), Jun 13, 2022: Airbus A319132. TRANSCEIVER. DEFECTIVE. AIRCRAFT WAS GROUNDED: VHF 1 BECAME UNUSABLE DURING DESCENT. CONSTANT POPPING SOUND AND FREQUENT INABILITY TO HEAR ATC. (N819AW) - [SDR IXXA202202150001](https://openairdocs.org/sdr/IXXA202202150001), Feb 15, 2022: Boeing 767232. ANTENNA. CORRODED. AFT LOWER VHF COMM ANTENNA HAS LEADING EDGE CORROSION (N762CX) - [SDR CALA2022012700254](https://openairdocs.org/sdr/CALA2022012700254), Jan 27, 2022: Boeing 767322. TRANSCEIVER. INOPERATIVE. INFLIGHT VHF1 FAILED CALLED TOMC.. RADIO WORKED AGAIN 1+15 AFTER IT FAILED FLT CREW DEBRIEF STATED LH RTP REMAINED POWER (N674UA) - [SDR K11A2021110900083](https://openairdocs.org/sdr/K11A2021110900083), Nov 9, 2021: Boeing 737436. TRANSCEIVER. INOPERATIVE. PROBLEM DESCRIPTION: NUMBER 1 VHF COM NOT TRANSMITTING. CORRECTIVE ACTION & OTHER PERTINENT INFORMATION: SWAPPED #1 AND (N734CK) - [SDR AALA202109081019](https://openairdocs.org/sdr/AALA202109081019), Sep 7, 2021: Airbus A319132. TRANSCEIVER. INTERMITTENT. AIRCRAFT WAS GROUNDED: ALL VHF RADIOS ARE BAD ON TAKEOFF WE WERE UNABLE TO TRANSMIT OR RECEIVE ON ALL THREE RADIOS THIS (N837AW) - [SDR 9JLA202108168195](https://openairdocs.org/sdr/9JLA202108168195), Aug 10, 2021: Cessna 525B. VHF COMM. FAILED. THE FLIGHT CREW REPORTED THE NO1 COM UNIT INOP. THE MAINTENANCE TEAM TROUBLESHOT AND FOUND THAT THE COMM 1 VHF-4000 TRAN (N831HS) - [SDR V0XD20210613001](https://openairdocs.org/sdr/V0XD20210613001), Jun 13, 2021: Cndair CL6002D24. ANTENNA. CORRODED. VHF #3 ANTENNA IS CORRODED. CORRECTIVE ACTION: REMOVED AND REPLACED # 3 VHF ANTENNA(PN: S65-8280-10) IAW CRJ 900 AMM 23- (N931LR) - [SDR DXTA2021051041740](https://openairdocs.org/sdr/DXTA2021051041740), May 8, 2021: Emb EMB505. VHF COMM. DEFECTIVE. COM1 VHF COMM: CREW EXPERIENCED A VERY BRIEF ELECTRICAL BURNING SMELL IN THE COCKPIT. SHORTLY THEREAFTER, FOUND THAT COM (N426QS) - [SDR SIMA20210502003](https://openairdocs.org/sdr/SIMA20210502003), May 2, 2021: Emb ERJ170200LR. VHF COMM. MALFUNCTIONED. COMM 1 INTERMITTENTLY INOPERATIVE DURING CLIMBOUT-COMM 1 STATIC AND NOISE AND POOR RECEPTION WICH DETERIERATED BEGINNING (N237NN) - [SDR DALA2021041602252](https://openairdocs.org/sdr/DALA2021041602252), Apr 16, 2021: Airbus A320212. VHF COMM. INTERMITTENT. SHIP 3235 - ATB - DUE TO ALL VHF COMMUNICATION BEING INTERMITTENT. OTHER AIRCRAFT FAULTS PRESENT INDICATING POSSIBLE ELE (N335NW) - [SDR AALA202103129006](https://openairdocs.org/sdr/AALA202103129006), Mar 11, 2021: Airbus A321211. CONTROL HANDLE. INOPERATIVE. WHILE DESCENDING THRU 10,000' MEAN SEA LEVEL CREW LOST ALL COMMUNICATIONS, ELECTRONIC CENTRALIZED AIRCRAFT MONITOR MESSA (N179UW) - [SDR AALA202101199003](https://openairdocs.org/sdr/AALA202101199003), Jan 18, 2021: Airbus A319112. AMU. INTERFERENCE. AIRCRAFT WAS GROUNDED. AT LOW ALTITUDE ON APPROACH AND ON DEPARTURE AFTER TAKE-OFF THERE IS A LOUD ACARS DATA STREAM NOI (N737US) - [SDR AALA202012039014](https://openairdocs.org/sdr/AALA202012039014), Dec 1, 2020: Airbus A319112. AMU. INOPERATIVE. AIRCRAFT WAS GROUNDED. VHF1 AND 2 HAVE EXCESSIVE BLEED OVER FROM ALL OTHER UNSELECTED RADIOS. DIFFICULT TO HEAR CONTROLL (N755US) All 1,271: https://openairdocs.org/jasc/2312/reports.md ## Other codes in chapter 23 - [JASC 2300](https://openairdocs.org/jasc/2300): Communications System (1,971 reports) - [JASC 2310](https://openairdocs.org/jasc/2310): HF Communications System (1,684 reports) - [JASC 2311](https://openairdocs.org/jasc/2311): UHF Communications System (69 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 (628 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) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.