# Service difficulty reports: JASC 3452

A list on [JASC 3452](https://openairdocs.org/jasc/3452.md).

Reports filed under 3452 · ATC Transponder System, newest first.

Page 1 of 13 · 624 reports

- [SDR DALA2026053103305](https://openairdocs.org/sdr/DALA2026053103305.md): Transponder · failed · May 28, 2026 · N370NB · Airbus A319114
  > ATC REPORTED INTERMITTENT MODE C. ALTITUDE REPORTING FAILURES IN ROUTE. ATC TRANSPONDER/AUTOMATIC ALTITUDE REPORT SYS AND A/C VACATED RVSM AIRSPACE. USE FLT AWARE TO VERIFY DATA GAPS FOR THIS FLIGHT. C/A: R/R ATC TRANSPONDER 1 +2 IAW A319 AMM 34-52 BITE TEST P
- [SDR AALA202508192006](https://openairdocs.org/sdr/AALA202508192006.md): Control Panel · odor · Aug 15, 2025 · N969NN · Boeing 737823
  > AIRCRAFT WAS GROUNDED: ACRID SMELL IN FLIGHT DECK. ACCOMPLISHED CARD 08L00021001. FOUND TCAS AND ATC PANEL PRODUCING ACRID ODOR. REMOVED AND REPLACED PANEL, PER AMM 34-53-03.
- [SDR YENA2025080500801](https://openairdocs.org/sdr/YENA2025080500801.md): Transponder · no test · Aug 4, 2025 · N4062J · Airbus A321271NX
  > FLT#2260, MAD-BOS. (ETOPS) ATC/XPDR 2 FAILED DURING PRE FLIGHT ( ATC SYSTEM - TRANSPONDER SINGLE POSITION); OPERATIONAL TEST OF THE ATC WAS ACCOMPLISHED AS PER AMM 34-52-00-740-004-A.NO FAULTS NOTED ON BOTH CHANNELS MX-4 UPDATED. PLACARD REMOVED.
- [SDR ABXA20250804170](https://openairdocs.org/sdr/ABXA20250804170.md): Transponder · inoperative · Aug 4, 2025 · N219CY · Boeing 767383
  > ON TAXI OUT, ATC TRANSPONDER INOP. AIRCRAFT RETURNED TO BLOCKS. (BTB). MAINTENANCE PERFORMED OPS TEST OF TRANSPONDER IAW AMM 34-53-03. OPS TEST GOOD. AIRCRAFT RETURNED TO SERVICE.
- [SDR MTNA20250327001](https://openairdocs.org/sdr/MTNA20250327001.md): Transponder · inoperative · Mar 27, 2025 · N988FE · Cessna 208B
  > DURING CLIMB OUT FOR FLIGHT 8300 EWR-IAD, THE PIC IDENTIFIED THE TRANSPONDER WAS INOP AND COMPLETED AN AIR RETURN, DECLARING NO EMERGENCY AND LANDING UNEVENTFULLY.
- [SDR SWI2024F00559](https://openairdocs.org/sdr/SWI2024F00559.md): Antenna · scratched · May 13, 2024 · N679CA · Cndair CL6002D24
  > FORWARD ATG ANTENNA HAS TOOLING MARKS AROUND THE CONNECTOR HOLES, HN00159971 (C-CHECK RO 7/9/2024) REPLACED NEW FWD ATG ANTENNA DOUBLER REF GOGO DOC# D12710-20110 REV J & SRM 51-42-20-001-001-A01 COMPLIED WITH SKYWEST TASK CARD 51-900-1002-SKY LEAK A
- [SDR ABXA20240319859](https://openairdocs.org/sdr/ABXA20240319859.md): Control Panel · inoperative · Mar 18, 2024 · N219CY · Boeing 767383
  > ATC COULD NOT READ XPONDER, NEITHER L NOR R. AC RETURNED TO GATE. MAINTENANCE PERFORMED TROUBLESHOOTING RESULTING IN REPLACEMENT OF THE ATC CONTROL PANEL IAW AMM 34-53-02. OPS TEST OF BOTH TRANSPONDERS GOOD. AC RVSM COMPLIANT. AC DEPARTED.
- [SDR ABXA20240216525](https://openairdocs.org/sdr/ABXA20240216525.md): Transponder · unknown · Feb 15, 2024 · N219CY · Boeing 767383
  > ATC REPORTED ONLY PRIMARY ON THE L XPDR SWAPPED TO R NO CHANGED AC RETURENED TO GATE AND MAINTENANCE GROUNDED AC. MAITENANCE PERFORMED ATC TEST IAW B767 AMM 34-53-01 NO FAULT FOUND TEST PASSED AC REMAIN CAT IIIB. AND RETURND AC TO SERVICE. AND AC DEPARTED.
- [SDR 2023FA0000414](https://openairdocs.org/sdr/2023FA0000414.md): Transponder · defective · Aug 12, 2023 · N939FE · Cessna 208B
  > PILOT OBSERVED SMOKE IN COCKPIT CAUSED BY FAULTY TRANSPONDER INSTALLED UNDER STC# SA01512WI-D 07/09/2010. FOUND BURNT CHIP ON CIRCUIT BOARD.
- [SDR GTIA2023072437350](https://openairdocs.org/sdr/GTIA2023072437350.md): Transponder · fault message · Jul 22, 2023 · N695NK · Airbus A320232
  > TRANSPONDER SYSYTEM 1 +2 FAILED IN FLIGHT NAV TCAS FAULT-PERFORMED BITE TEST OF THE TCAS IAW AMM 34-43-00-740-A. NO FAULTS NOTED AT THIS TIME. A/C OK FOR SVC. PERFORMED MMR 1&2 BITE TEST IAW AMM 34-36-00. PERFORMED ATC BITE TEST IAW AMM 34-52-00. NO FAULTS
- [SDR 2023FA0000322](https://openairdocs.org/sdr/2023FA0000322.md): Transponder · warning message · Jun 21, 2023 · N713ND · Piper PA28181
  > GARMIN GTX345 TRANSPONDER FAILED ON TAKE OFF. "XPDR FAIL" CAS MESSAGE. TRANSPONDER SEEMS TO HAVE QUIT COMMUNICATING WITH G1000NXI SYSTEM. PROBLEM CLEARED WITH POWER CYCLE OF G1000NXI SYSTEM. INTERROGATED TRANSPONDER WITH TEST SET IN AIR AND GROUND CO
- [SDR DXTA2023021480470](https://openairdocs.org/sdr/DXTA2023021480470.md): Unknown · unknown · Feb 13, 2023 · N762QS · Bombdr BD1001A10
  > DURING CRUISE AT FL410 A TCAS IN STBY DIDPLAYED ON THE MFD AND A WHITE XPDR IN STBY CAS MESSAGE DISPLAYED. TRANSPONDER WAS IN A/RA BUT TRANSPONDER CODE WAS YELLOW ALONG WITH FLIGHT ID. ATC NOT ABLE TO GET ANYTHING BUT A PRIMARY RETURN, REGARDLESS OF WHICH TRA
- [SDR DXTA2021081246810](https://openairdocs.org/sdr/DXTA2021081246810.md): Transponder · faulted · Aug 11, 2021 · N779QS · Bombdr BD1001A10
  > AMBER XPDR 1 FAIL CAS MESSAGE ILLUM. C/B TRIPPED WITH ODOR OF SMOKE. SMOKE ODOR DISSIPATED WITH BREAKER OFF. T/S FAILED TCAS/XPDR, NO MDC DATA CHECK FOR CODES. XPDR 1 FAIL CAS IS ACTIVE & DID NOT GO OUT CB IN. FOUND TCAS/XPDR 1 CB OUT ON ARRIVAL, RESET C
- [SDR AALA202105179030](https://openairdocs.org/sdr/AALA202105179030.md): Control Panel · smoke · May 14, 2021 · N909NN · Boeing 737823
  > AIRCRAFT WAS GROUNDED: AT FL340, EXPERIENCED SMOKE IN COCKPIT FROM "FL' BUTTON ON TRANSPONDER AND FOUND "ELECTRICAL PANEL LIGHTS" CIRCUIT BREAKER POPPED; FLIGHT DIVERTED TO ORD AND LANDED WITHOUT FURTHER INCIDENT. REPLACED AIR TRAFFIC CONTROL CONTROL PANEL IAW
- [SDR SIMA20210329003](https://openairdocs.org/sdr/SIMA20210329003.md): Transponder · failed · Mar 29, 2021 · N696AE · Emb EMB145LR
  > AVIONICS ISSUES TRANSPONDER 1 FAIL NO FMS GS AFTER ROTATION FD WENT AWAY MFD TRACKING INCORRECTLY NO EICAS MESSAGE EMERGENCY NOT DECLARED. -C/A-INSPECTED FMS 1 AND 2 AND FOUND BOTH GPS 1 AND 2 FAIL ON CAPT'S SIDE PERFORMED RESET OF ELECTRICAL SYSTEM AS PER AMM
- [SDR 9JLA2021010828358](https://openairdocs.org/sdr/9JLA2021010828358.md): Transponder · malfunctioned · Dec 13, 2020 · N480M · Beech 400A
  > IT WAS REPORTED FROM AIR TRAFFIC CONTROL (ATC) THAT THE AIRCRAFTS NR 1 TRANSPONDER SYSTEM WAS NOT TRANSMITTING MODE C ON MULTIPLE LEGS. THE MAINTENANCE VENDOR FUNCTIONAL CHECKED THE SYSTEM AND WAS NOT ABLE TO VERIFY THE DISCREPANCY ON THE GROUND. ALL TESTING
- [SDR ABXA20200803206](https://openairdocs.org/sdr/ABXA20200803206.md): Antenna · broken · Nov 4, 2020 · N749AX · Boeing 767232
  > TIP OF LOWER ATC ANTENNA FOUND BROKEN OFF. DEFERRED BY MAINTENANCE PROCEDURES. AIRCRAFT DEPARTED AND CREW HAD AN ATC FAULT MESSAGE. AIRCRAFT RETURN TO BLOCK AND WAS GROUNDED. REMOVED AND REPLACED ATCD ANTENNA, IAW AMM 34-53-03. AIRCRAFT RELEASED FOR FLIGH
- [SDR IKBR2020100500012](https://openairdocs.org/sdr/IKBR2020100500012.md): Antenna · deteriorated · Oct 5, 2020 · N737LG · Cessna 172N
  > DURING 50HR INSPECTION FOUND TRANSPONDER ANTENNA DETERIORATED AND CRACKED. INSTALLED NEW TRANSPONDER ANTENNA P/N AV-22.
- [SDR BKEA20200115001](https://openairdocs.org/sdr/BKEA20200115001.md): Control Panel · malfunctioned · Jan 11, 2020 · N719SA · Gulstm GIV
  > CONTROL PANEL WAS NOT SET TO DURING THE MONITORED FLIGHT. WE ALSO NOTED THAT WHEN THE CONTROL PANEL WAS SET, THE SYSTEM REPORTED PROPERLY. SWAPPED IN ANOTHER PANEL FROM N110SN FOR TROUBLESHOOTING WITH THE SAME RESULTS. THE QUESTION THEN BECAME, IS THE CONTROL
- [SDR DEMA20191231001](https://openairdocs.org/sdr/DEMA20191231001.md): Transponder · failed · Dec 30, 2019 · N922FE · Cessna 208B
  > ON FINAL APPROACH, NR 1 TRANSPONDER FAILED. WHILE PILOT WAS CHANGING TO NR 2 TRANSPONDER, THE NR 1 TRANSPONDER BEGAN TO SMOKE. PILOT PULLED CIRCUIT BREAKER FOR NR 1 TRANSPONDER. LANDED WITHOUT INCIDENT.
- [SDR RU3A201912054067](https://openairdocs.org/sdr/RU3A201912054067.md): Transponder · fumes · Dec 3, 2019 · N67 · Beech 300BEECH
  > ACRID SMOKE IN CABIN AFTER START UP. AVIONIC ON & ENVIRONMENTAL ON. MX CONFIRMED #2 TRANSPONDER WAS SOURCE OF FUMES. REMOVED AND REPLACED #2 MODE S TRANSPONDER.
- [SDR CA190411003](https://openairdocs.org/sdr/CA190411003.md): Transponder · inaccurate · Apr 10, 2019 · Airbus BD5001A11
  > (CAN) BA SER CASE: 43929 SER - ATC COMPLAINED THAT XPDR WAS GIVING FL550 INSTEAD OF FL390 O CREW:XNDR#2 FAIL, ATC COMPLAINED THAT XPDR WAS GIVING FL550 INSTEAD OF FL390 - AFTER FULL POWER RESET-XPDR OPS TESTED-OK (TC# 20190411003)
- [SDR CA190329031](https://openairdocs.org/sdr/CA190329031.md): Transponder · failed · Mar 28, 2019 · Cessna 208
  > (CAN) TRANSPONDER SMOKING IN FLIGHT. PILOT REMOVED ELECTRICAL POWER TO THE TRANSPONDER. (TC# 20190329031)
- [SDR 6GTA201812110009](https://openairdocs.org/sdr/6GTA201812110009.md): Software · incorrect · Dec 9, 2018 · N2304D · Piper PA46R350T
  > AIRCRAFT G1000 SYSTEM SHOWED VERSION 17, BUT THERE WAS NO LOG ENTRY FOR APPLICATION OF SERVICE LETTER 1194. A SOFTWARE MISMATCH ERROR WAS NOTED ON A GFC COMPONENT AT 3299 HOURS AND THAT ONE COMPONENT SOFTWARE WAS RELOADED AND ALL SYSTEMS APPEARED TO OPERATE NO
- [SDR FDEA201811273378](https://openairdocs.org/sdr/FDEA201811273378.md): Transponder · inoperative · Nov 27, 2018 · N594FE · Doug MD11F
  > AT 1 30 HRS INTO FLIGHT, RECEIVER LEVEL 1 TRANSPONDER 1 FAIL. SWITCHED TO TRANS 2 AND RECEIVED TRNSP 2 FAIL. BOTH TRANSPS INTERMITTENTLY FAILED REMAINING FLIGHT. TRANSPORTER 1 REPLACED SYSTEM 1 AND 2 FIM TASK 34-54-00-1, TEST OK. NO FAULTS REV NOV 1/2010. REPL
- [SDR CA180223007](https://openairdocs.org/sdr/CA180223007.md): Transponder · failed · Feb 11, 2018 · Airbus BD5001A11
  > (CAN) LOST RADAR CONTACT WITH ATC FOR ~ 15 MIN, AFTER SEVERAL XPDR - SWITCHING`S (ON - OFF/NR 1 - NR 2) AND DIFFERENT SQUAWKS (1000/2000) RADAR CONTACT WAS BACK AGAIN DURING DESCENT AND APPROACH. OTHER EVENT UNDER SDR 20180221004 (ATC XPDR NR 2 REPLACEMENT).
- [SDR DALA2017122108792](https://openairdocs.org/sdr/DALA2017122108792.md): Control Panel · failed · Dec 20, 2017 · N878DN · Boeing 737932ER
  > DURING TAXI OUT BOTH TRANSPONDERS 1 AND 2 FAILED. A BURNING ODOR WAS NOTED IN THE FLIGHT DECK WITH GPS LEFT FAILURE AND BOTH CLOCKS BLANK. AIRCRAFT RETURNED TO GATE. MAINTENANCE REMOVED AND REPLACED TRANSPONDER PANEL IAW AMM 34-53. OPERATIONAL CHECK OK, AIRCRA
- [SDR 6CBA2017081517171](https://openairdocs.org/sdr/6CBA2017081517171.md): Transponder · failed · Aug 15, 2017 · N877AF · Pilats PC1247
  > ENROUTE, THE FLIGHT CREW REPORTED AN ELECTRICAL BURNING ODOR, POSSIBLY TRANSPONDER, ATC CONFIRMED THAT THEY WERE NOT RECEIVING TRANSPONDER DATA. DIVERTED AND MADE A SAFE UNSCHEDULED LANDING. AVIONICS FOUND THE KT 70 TRANSPONDER FAULTY. VERIFIED THIS UNIT B
- [SDR FDEA201707071876](https://openairdocs.org/sdr/FDEA201707071876.md): Computer · failed · Jul 7, 2017 · N625FE · Doug MD11F
  > GPWS FAILED WITH NOTICEABLE ELECTRICAL ODOR. NO SMOKE. CFDS SHOWS GPWC CURRENT FAULT 344507. FRONT FACE OF EPGWS HAS COMPUTER FAIL LIGHT6 ON. UNABLE TO DETECT ANY ELECTRICAL ODORS IN COCKPIT OR FWD AVIONICS AND INSPECTED EPGWS, FOUND NO SIGNS OF CHA
- [SDR AALA20161229014](https://openairdocs.org/sdr/AALA20161229014.md): Panel · contaminated · Dec 28, 2016 · N916AN · Boeing 737823
  > AIRCRAFT WAS GROUNDED. EMERGENCY DECLARED. JFK-CUN FLIGHT RETURNED TO JFK ACCOUNT SMOKE IN THE COCKPIT DURING CLIMBOUT. OVERWEIGHT LANDING UNEVENTFUL. FLUID FOUND ON ATC/TRANSPONDER PANEL. REMOVED AND REPLACED ATC CONTROL PANEL(AALA20161228013), VHF NAVIGATION
- [SDR AALA20161229013](https://openairdocs.org/sdr/AALA20161229013.md): Panel · inoperative · Dec 28, 2016 · N916AN · Boeing 737823
  > AIRCRAFT WAS GROUNDED. EMERGENCY DECLARED. JFK-CUN FLIGHT RETURNED TO JFK ACCOUNT SMOKE IN THE COCKPIT DURING CLIMBOUT. OVERWEIGHT LANDING UNEVENTFUL. FLUID FOUND ON ATC/TRANSPONDER PANEL. REMOVED AND REPLACED ATC CONTROL PANEL(AALA20161228013), VHF NAVIGATION
- [SDR AALA20161228013](https://openairdocs.org/sdr/AALA20161228013.md): Control Panel · inoperative · Dec 28, 2016 · N916AN · Boeing 737823
  > AIRCRAFT WAS GROUNDED. EMERGENCY DECLARED. JFK-CUN FLIGHT RETURNED TO JFK ACCOUNT SMOKE IN THE COCKPIT DURING CLIMBOUT. OVERWEIGHT LANDING UNEVENTFUL. FLUID FOUND ON ATC/TRANSPONDER PANEL. REMOVED AND REPLACED ATC CONTROL PANEL, VHF NAVIGATION PANEL (AALA20161
- [SDR AXSA 991 10/14/16](https://openairdocs.org/sdr/AXSA%20991%2010%2F14%2F16.md): Transponder · failed · Oct 14, 2016 · N991FX · Cessna 208B
  > THE PILOT REPORTED SMELLING SOMETHING HOT FOLLOWED BY TRANSPONDER NR 1 BECOMING INOPERATIVE. THE PILOT PULLED THE APPROPRIATE CIRCUIT BREAKER AND CONTINUED ON WITH THE NR 2 TRANSPONDER.
- [SDR AXSA201609290001](https://openairdocs.org/sdr/AXSA201609290001.md): Transponder · failed · Sep 29, 2016 · N931FE · Cessna 208B
  > NR ONE TRANSPONDER FAILED WITH A PUFF OF SMOKE, PILOT TURNED UNIT OFF AND PULLED BREAKER.
- [SDR 2016FA0000457](https://openairdocs.org/sdr/2016FA0000457.md): Transponder · smoke · Sep 27, 2016 · N3518 · Cessna 206H
  > SMOKE FROM TRANSPONDER ON APPROACH FOLLOWED BY FAILED MASSAGE. SHORTLY AFTER SCREEN WENT BLACK.
- [SDR AALA20160422003](https://openairdocs.org/sdr/AALA20160422003.md): Control Panel · faulty · Apr 22, 2016 · N760AN · Boeing 777223
  > AIRCRAFT WAS GNDED. AIR INTERRUPT, EMER NOT DECLARED, LANDING UNEVENTFUL & ACFT NOT OVERWEIGHT. DURING CRUISE BOTH LT & RT TRANSPONDERS BECAME INOPERATIVE. R & R TCAS & ATC CONTROL PANEL & ACCOMPLISHED OPERATIONAL CHECK IAW AMM34-53-02. ACCOMPLISHED TCAS GN
- [SDR COEA2016040101940](https://openairdocs.org/sdr/COEA2016040101940.md): Transponder · smoke · Apr 1, 2016 · N940FE · Cessna 208B
  > FLIGHT 8695 LOG PAGE 160808. COMPONENT SMOKE ON DOWNWIND TO LANDING. SMOKE WAS OBSERVED COMING FROM NR 1 TRANSPONDER & BURNING WIRES WERE SMELLED, FAILED MSG APPEARED ON THE DISPLAY. TRANSPONDER WAS TURNED OFF & THE ACFT LANDED.
- [SDR AXSA20151217001](https://openairdocs.org/sdr/AXSA20151217001.md): Transponder · fumes · Dec 16, 2015 · N780FE · Cessna 208B
  > PILOT REPORTED BURNING SMELL IN COCKPIT.
- [SDR CA151212003](https://openairdocs.org/sdr/CA151212003.md): Transponder · failed · Dec 12, 2015 · Cessna 172M
  > (CAN) TRANSPONDER FAILED TEST DURING BIANNUAL TEST. UNIT FAILED FREQUENCY TEST UPON CORRELATION CHECK, UNIT WAS REPAIRED JUL 16, 2014 AND FREQUENCY WAS RECORDED LOW AT 1087 MHZ. SHOULD BE 1090 +- 1 MHZ.
- [SDR AWKA20151204001](https://openairdocs.org/sdr/AWKA20151204001.md): Transponder · failed · Oct 29, 2015 · N550XJ · Bombdr BD1001A10
  > ON DEPARTURE, DEPARTURE CONTROL ASKED THE FLIGHT CREW TO ENSURE THE TRANSPONDER WAS ON & SQUAWKING 3612. THE CREW THEN REPORTED BOTH TRANSPONDERS WERE INOPERATIVE BUT STILL SHOWING CODE 3612 WAS FUNCTIONING. THE FLIGHT CREW ELECTED TO RETURN TO THE DEPARTURE
- [SDR CA150914001](https://openairdocs.org/sdr/CA150914001.md): Transponder · unknown · Aug 30, 2015 · Bombdr DHC8402
  > (CAN) ATC FAILURE ON AUG 30TH, 2015. THE TIME-SERIES OF ATB EVENT IS AS FOLLOWS, ATC GROUND STATION CONFIRMED THAT NO RADAR ECHO FROM ACFT DURING TAXING. ATC OPERATED AS MULTILATERATION, ATC GROUND STATION ALSO CONFIRMED THAT NO RADAR ECHO WAS OBSERVED AFTER
- [SDR BKEA20150819](https://openairdocs.org/sdr/BKEA20150819.md): Transponder · malfunctioned · Aug 19, 2015 · N236LC · Gulstm 200
  > JUST AFTER TAKEOFF WE RECEIVED "RT T/R INOPERATIVE" CASS MESSAGE AND ATC REPORTED THAT THEY DIDN'T HAVE OUR TRANSPONDER. WE CYCLED THROUGH OUR TRANSPONDER OPTIONS AS ATC CONTINUOUSLY ASKED WHERE AND AT WHAT ALTITUDE WE WERE. DURING THE 31 MINUTE FLIGHT WE IN
- [SDR DALA2015080504798](https://openairdocs.org/sdr/DALA2015080504798.md): Transponder · smoke · Aug 4, 2015 · N372DA · Boeing 737832
  > DURING FLIGHT THE FLIGHT CREW NOTICED LIGHT SMOKE COMING FROM THE ATC TRANSPONDER PANEL IN THE COCKPIT. SWITCHED PANEL TO STBY AND THE SMOKE IMMEDIATELY STOPPED. OPENED BOTH TRANSPONDER CIRCUIT BREAKERS. THE FLIGHT CONTINUED TO DESTINATION. MAINTENANCE REPLA
- [SDR AXSA20150722001](https://openairdocs.org/sdr/AXSA20150722001.md): Transponder · smoke · Jun 30, 2015 · N119WA · Emb EMB110P1
  > PILOT REPORTED SMOKE COMING FROM BEHIND TRANSPONDER.
- [SDR CA150526001](https://openairdocs.org/sdr/CA150526001.md): Transponder · smoke · May 22, 2015 · Cessna 172N
  > (CAN) DURING TAXI OF ACFT, SMOKE WAS NOTICED COMING OUT FROM FACE OF TRANSPONDER. ACFT WAS SHUTDOWN & MAIN BASE NOTIFIED. AN INSPECTION WAS CARRIED OUT FROM A LOCAL AMO & DETERMINED TO BE AN INTERNAL PROBLEM WITH THE TRANSPONDER. THE UNIT WAS REMOVED & ACFT
- [SDR QMLA2014121414139](https://openairdocs.org/sdr/QMLA2014121414139.md): Transponder · malfunctioned · Dec 14, 2014 · N156AM · Bolkms BK117B1
  > THE PILOT DETECTED AN ELEC BURNING SMELL IN THE COCKPIT ON APPROACH. ONCE ON THE GND, HE CALLED IN THE MECHANIC TO INSPECT THE ACFT. FOUND THAT THE TRANSPONDER HAD BEEN THE SOURCE OF THIS SMELL & WAS INOPERATIVE. PLACED THE TRANSPONDER ON ORDER & DEFERRED T
- [SDR CALA2014060291180](https://openairdocs.org/sdr/CALA2014060291180.md): Warning System · false activation · May 30, 2014 · N797UA · Boeing 777222
  > LOWER EICAS HAS ATC MODE S TRANSPONDER & RT MX MSG 34-49995. RESET SYS & ACCOMPLISHED TRANSPONDER OPERATION CHECK IAW MM 34-53-02.
- [SDR CALA2014021290367](https://openairdocs.org/sdr/CALA2014021290367.md): Switch · faulty · Feb 12, 2014 · N590UA · Boeing 757222
  > TRANSPONDER LT & RT FAILED. REPLACED TOP ANTENNA COAXIAL SWITCH S10563 IAW AMM 34-53-04,PG401 & 34-53-00, PG501. BOTH ATC'S CHECKED OK, REINSTALLED FWD, PIT FWD, PANEL & TAPED.
- [SDR HNAA2014021200040](https://openairdocs.org/sdr/HNAA2014021200040.md): Dadc · failed · Feb 12, 2014 · N935HA · Dhav DHC8102
  > BOTH TRANSPONDERS ARE INOPERATIVE. R & R NR 1 DADC. SYSTEM CHECKS GOOD IAW AMM 34-12-02 AND SB 34-68.
- [SDR O2GA2014022680601](https://openairdocs.org/sdr/O2GA2014022680601.md): Transponder · malfunctioned · Feb 6, 2014 · N806UP · Beech B300
  > AIRCRAFT DEPARTED, CREW SWITCHED THE NR 1 TRANSPONDER FREQUENCY FROM TOWER TO DEPARTURE & WAS NOTIFIED THAT THEIR TRANSPONDER SIGNAL WAS INTERMITTENT. CREW SWITCHED OVER TO THE NR 2 TRANSPONDER & DEPARTURE NOTIFIED THEM THAT THE NR 2 TRANSPONDER SIGNAL WAS NO

Next page: https://openairdocs.org/jasc/3452/reports.md?page=2

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy
FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet'
WHERE jasc_code = '3452'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/jasc/3452/reports

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