JASC 3452

Service difficulty reports · 624

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

Query with SQL
duckdb -csv -c "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"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

SDR 9702709915Transponder · malfunctionedBOTH TRANSPONDERS FAILED AFTER TAKEOFF. FLIGHT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED TRANSPONDER CONTROL PANEL AND ATC INTERLOCK RELAY R20-9, OPERATIONAL CHECK NORMAL.Feb 10, 1997 · N965N · Doug DC931SDR HEEA978883Transponder · failsAFTER UNIT WARMS UP 45 MINUTES KT76A TRANSPONDER WON'T RECEIVE ATC600 SIGNALS. TIME SINCE REPAIR 0:00.Jan 14, 1997SDR 97ZZZX717Transponder · inoperativeTRANSPONDER INOPERATIVE. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Dec 23, 1996 · N7059N · Bolkms BK117B1SDR HEEA968737Transceiver · inoperativeREPORTED BY TOWER, INOPERATIVE. PERFORMED PRELIMINARY INSPECTION. FOUND SWITCH ASSY. INTERMITTENT. ALSO FOUND POWER OUT LOW AND PHOTOCELL (V301) PHOTOCELL. REPAIRED. ADJUSTED PULSE WIDTH AND FREQUENCY. BENCH CHECK GOOD.Dec 13, 1996 · N16938 · Bell 206L1SDR HEEA968736Transceiver · defectiveFREQUENCY OUT OF TOLERANCE. PERFORMED PRELIMARY INSPECTION. ADJUSTED PULSE WIDTH AND FREQUENCY TO SPECS. FOUND RECEIVER SENSITIVITY LOW. REPLACED CR202 MIXER DIODE. HEATED AND VIBRATED UNIT. BENCH CHECK GOOD.Dec 13, 1996 · N911RZ · Bolkms BK117A4SDR HEEA968734Transceiver · malfunctionLOCK BROKEN. REPLACED BROKEN LOCKING MECHANISM. ALSO REPLACED DEFECTIVE DIODE CR202 THAT CAUSED WEAK SENSITIVITY. ADJUSTED PRESELECTOR FOR PROPER SENSITIVITY. UNIT BENCH CHECK GOOD.Dec 13, 1996 · N39122 · Bell 206B3SDR HEEA968619Transceiver · weakTRANSCEIVER WEAK RECEIVE.Dec 9, 1996 · N107PH · Bell 206B3SDR HEEA968560Transceiver · defectiveDOESN'T REPORT CODE PROPERLY. PERFORMED PRELIMINARY INSPECTION, CLEANED WAFER SWITCHES, REPAIRED. REPLACED R477 RESISTOR DUE TO BEING DETERIORATED. REPAIRED. ALSO REPLACED BLOWN FUSE (F401). REPAIRED. BENCH CHECK GOOD.Nov 25, 1996 · N62127 · Bell 206L4SDR 96ZZZX5980Transponder · inoperativePILOT REPORTED ELECTRICAL SMELL IN COCKPIT, NO VISIBLE SMOKE. HE DECLARED AN EMERGENCY AND PROCEEDED TO ISOLATE, ELECTRICAL SYSTEMS. LANDING WAS UNEVENTFUL. MAINTENANCE INSPECTED THE AIRCRAFT WIRING, CIRCUIT BREAKERS, AND SWITCHES AND COULD FIND NO DISCREPANov 21, 1996 · N744FX · Cessna 208BSDR HEEA968471Transceiver · defectiveWHEN FIRST DIGIT IS SELECTED AS "6" SOMETIMES "5" AND SOMETIMES "7" ARE TRANSMITTED INSTEAD. CLEANED CONTACTS AND WAFERS, REPAIRED, ALSO REPLACED V301 PHOTOCELL AND DETERIORATED R477 RESISTOR AND FOUND FREQUENCY AND POWER WOULD NOT ADJUST TO SPECS. REPLACED VNov 6, 1996 · N2145C · Bell 206BSDR HEEA968469Transceiver · inoperativeTRANSCEIVER INOPERATIVE. FOUND V101 CAVITY DRAWING EXCESSIVE CURRENT. REPLACED V101 CAVITY OSCILLATOR. ALSO REPLACED RM401 AND RM402 RESISTOR CAPACITOR NETWORKS TO COMPLY WITH MOD 7 AND INSTALLED HEAT SINK ON Q415 TRANSISTOR TO COMPLY WITH MOD 6. INSPECTED Nov 6, 1996 · N6100U · Snias AS350B2SDR HEEA968417Transceiver · inopTRANSCEIVER INOPERATIVE. INTERGRATION LIGHT WILL COME ON BUT IT IS NOT SENDING OUT SIGNAL. FOUND POWER OUT LOW, ADJUSTED V101. NO HELP. REPLACED V101. REPAIRED. ALSO REPLACED BAD PHOTOCELL V301. REPAIRED. PLACED IT IN FREEZER, HEATED AND VIBRATED. BENCNov 4, 1996 · N6161A · Bell 206L3SDR HEEA968416Transceiver · defectiveTOWER REPORTED INTERMITTENT OPERATION. FOUND POWER OUT LOW, PERFORMED PRELIMINARY INSPECTION. FOUND FUSE F401 BLOWS WHEN UNIT IS TURNED ON. REPLACED V101 CAVITY TUBE V301 PHOTOCELL, ALSO REPLACED R477 RESISTOR. TROUBLESHOT UNIT, FOUND SWITCH BOARD BEING SHONov 4, 1996 · N9190Y · Bolkms BO105SSDR HEEA968415Transceiver · weakPILOT COMPLAINT OF WEAK SIGNAL. FOUND RECEIVE WEAK AND POWER OUT LOW, ADJUSTED V101. NO HELP. REPLACED V101 CAVITY OSCILLATOR. REPAIRED. ADJUSTED PULSE WIDTH AND FREQUENCY, PLACED IN FREEZER, HEATED AND VIBRATED. BENCH CHECK GOOD.Nov 4, 1996 · N137AE · Bolkms BO105SSDR HEEA968412Control · defectiveTRANSPONDER INOPERATIVE. PERFORMED PRELIMINARY INSPECTION, FOUND DIODES CR204 & CR205 SHORTED. ALSO FOUND C214 CAPACITOR BAD. REPLACED CR204, CR205, C214. REPAIRED. ALSO REPLACED PHOTOCELL V101 AND PHOTOCELL LENS P/N 088-00548-0000 AND RETAINING RING P/N 0Nov 4, 1996 · N8045T · Bell 214STSDR 96ZZZX5701Transponder · defectiveTRANSPONDER NUMBERS WILL NOT CHANGE.Nov 4, 1996 · N230JP · Bell 230SDR 97ZZZX794Transponder · defectiveTRANSPONDER REPLIED ERRATICALLY. REPLIES WERE NOT SYNCHRONIZED WITH INTERROGATIONS. REPLACED LEAKY CAPACITOR C441. DEFECTIVE PART HAD BLACK EPOXY COATING. REPLACEMENT PART HAD TAN COATING. PROBLEM DISAPPEARED. IN ADDITION, TRANSPONDER AUTOMATIC OVERLOAD Oct 18, 1996 · N340EC · Cessna 340ASDR HEEA968372Transponder · failedTRANSPONDER WILL NOT REPORT. CHECKED VOLTAGE, SWAPPED HALVES OF UNIT WITH A GOOD UNIT. VERIFIED PROBLEM ON LOCAL OSCILLATOR HALF OF UNIT. REPLACED V101 AND DID NOT HELP. SWAPPED MIXER DIODE. ALSO NO HELP.Oct 15, 1996 · N2764F · Bell 206L1SDR HEEA968175Transceiver · intermittentINTERMITTENT SIGNAL.Oct 10, 1996 · N4034Q · Snias AS350B2SDR HEEA968043Transceiver · inoperativeINOPERATIVE. REPLACED V101CAVITY OSC. REPAIRED. ADJUSTED PULSE WIDTH AND FREQUENCY, ALSO ADJUSTED SLS. BENCH CHECK GOOD.Oct 3, 1996 · N2770Y · Bell 206L1SDR HEEA968042Transceiver · defectiveKNOB BROKEN. REPLACED FACEPLATE ASSEMBLY. ALSO REPLACED WEAK V301 PHOTODETECTOR AND REPLACED BROKEN PLASTIC LOCKING MECHANISM. BENCH CHECK GOOD.Oct 3, 1996 · N50182 · Bell 206L1SDR HEEA968041Transceiver · inoperativeINOPERATIVE FROM STOCK. REPLACED DEFECTIVE Q415 TRANSISTOR. REPAIRED PROBLEM. INSPECTED AND BENCH CHECK GOOD.Oct 3, 1996SDR HEEA968040Transceiver · failedSIGNAL IS INTERMITTENT. INSTALLED Q415 HEATSINK. REPLACED HEAT SHRINK ON 9V LINE FOR LOCAL OSCILLATOR. PLACED IN FREEZER, UNIT STILL INTERMITTENT. FOUND IC I405 BAD. REPLACED IC I405. REPAIRED. BENCH CHECK GOOD.Oct 3, 1996 · N4031L · Snias AS350B2SDR HEEA968039Transceiver · defectiveATC NOT PICKING UP SIGNAL. FOUND SWITCH ASSY WORKING INTERMITTENTLY. CLEANED SWITCHES , NO HELP. REPLACED SWITCH ASSY P/N 200-00381-0001. REPAIRED. BENCH CHECK GOOD.Oct 3, 1996 · N217UC · Bolkms BK117B1SDR HEEA968033Transponder · defectiveATC XPONDER UNIT DOES NOT MEET MANUFACTURE AND AIRWORTHINESS STANDARDS. NUMBERS DON'T SEQUENCE CORRECTLY. IDENT SWITCH LIGHT DOES NOT COME ON AND GOES OFF INTERMITTENTLY . TEST SWITCH DOESN'T WORK AT ALL. TIME SINCE REPAIR 0:00.Oct 3, 1996SDR HEEA967804Transponder · malfunctionTRANSPONDER WORKS INTERMITTENTLY. FOUND MAXIMUM POWER OUT TO BE APPROXIMATELY 20 WATTS. REPLACED CAVITY TUBE V101. REPAIRED. ADJUSTED FREQUENCY. COOKED UNIT UNDER HEAT LAMP, VIBRATED AND PUT IN FREEZER. BENCH CHECK GOOD.Sep 9, 1996 · N135AE · Bolkms BO105SSDR HEEA967747Transponder · failedTRANSPONDER INOPERATIVE; ARCHING NOISE WHEN TURNED ON.Sep 3, 1996 · N31217 · Skrsky S76ASDR HEEA967740Transponder · intermittentTRANSPONDER INTERMITTENTLY INOPERATIVE.Sep 3, 1996 · N22608 · Bell 412SDR HEEA967738Transceiver · wont testNO SELF TEST. REPLACED SWITCH BOARD ASSEMBLY P/N 200-0381-01. REPAIRED. ADJUSTED PULSE WIDTH AND FREQUENCY. BENCH CHECK GOOD.Sep 3, 1996 · N81992 · Bolkms BO105SSDR HEEA967737Transponder · defectiveINTERMITTENT AND WEAK. REPLACED V101 CAVITY TUBE. REPAIRED. ALSO REPLACED DETERIORATED RESISTOR R477. BENCH CHECK GOOD.Aug 30, 1996 · N1078C · Bell 206L1SDR HEEA967736Transponder · intermittentTOWER REPORTED TRANSPONDER TO BE WORKING INTERMITTENTLY. FOUND LOW POWER OUT. TRIED ADJUSTING. NO HELP. REPLACED CAVITY OSCILLATOR V101. REPAIRED. ADJUSTED FREQUENCY AND PULSE WIDTH. CLEANED WAFER SWITCHES. COOKED UNIT UNDER HEAT LAMP , VIBRATED AND PUTAug 30, 1996 · N8765J · Bolkms BK117A3SDR HEEA967716Transceiver · defectiveWEAK TRANSMIT. REPLACED CAVITY OSCILLATOR V101. REPAIRED. COOKED UNIT UNDER HEAT LAMP, VIBRATED AND PUT IN FREEZER. BENCH CHECK GOOD.Aug 29, 1996 · N350BZ · Snias AS350B2SDR HEEA967697Transceiver · defectiveREPAIR CRACKED FACEPLATE. REPLACED BROKEN FACEPLATE ASSEMBLY. ALSO REPLACED WEAK V101 CAVITY OSCILLATOR BECAUSE OF LOW POWER OUT. ADJUSTED AS NEEDED. BENCH CHECK GOOD.Aug 29, 1996 · N724MB · Bolkms BO105SSDR HEEA967696Transceiver · intermittentINTERMITTENT TRANSMIT. VERIFIED UNIT TO HAVE LOW POWER OUT. TRIED ADJUSTING POWER TO SPECS. NO HELP. REPLACED CAVITY TUBE V101. REPAIRED. ADJUSTED FREQUENCY. COOKED UNIT UNDER HEAT LAMP, VIBRATED AND PUT IN FREEZER. FREQUENCY REMAINED STEADY. BENCH CHEAug 29, 1996 · N5793Z · Aerosp AS355F1SDR HEEA967695Transceiver · intermittentINTERMITTENT AS PER TOWER. REPLACED DEFECTIVE CR202 MIXER DIODE AND WEAK V101 CAVITY OSCILLATOR. ADJUSTED POWER AND FREQUENCY TO SPECS. BENCH CHECK GOOD.Aug 29, 1996 · N911RZ · Bolkms BK117A4SDR HEEA967608Transceiver · defectiveDOESN'T WORK IN AIRCRAFT USING TEST EQUIPMENT. FOUND FREQUENCY WOULD DROP OFF LINE WHEN VIBRATED. REPLACED V101 CAVITY TUBE. REPAIRED. ALSO REPLACED V301 PHOTOCELL. REPAIRED. BENCH CHECK GOOD.Jul 31, 1996 · N54197 · Bolkms BO105SSDR HEEA967607Transceiver · weakTRANSPONDER WEAK. FOUND FREQUENCY FALLS OFF LINE WHEN VIBRATED. REPLACED CAVITY OSCILLATOR V101. REPAIRED, COOKED UNIT UNDER HEAT LAMP, VIBRATED AND PUT IN FREEZER. BENCH CHECK GOOD.Jul 31, 1996 · N7170D · Bolkms BO105SSDR HEEA967606Transceiver · defectiveREPLY LIGHT DIM. REPLACED PHOTOCELL V301. REPAIRED. BENCH CHECK GOOD.Jul 31, 1996 · N2125M · Bell 206L1SDR HEEA967605Transceiver · inoperativeINOPERATIVE. REPLACED PHOTOCELL V301 DUE TO WEAK REPLY LIGHT. REPAIRED. COOKED UNIT UNDER HEAT, VIBRATED AND PUT IN FREEZER. BENCH CHECK GOOD.Jul 31, 1996 · N2268G · Bell 206B3SDR HEEA967604Transceiver · defectiveWOULD NOT TEST. FOUND FREQUENCY TO DRIFT WHEN VIBRATED AND COOKED UNDER HEAT LAMP. REPLACED CAVITY TUBE V101. REPAIRED. HEATED UNIT, VIBRATED AND PUT IN FREEZER. BENCH CHECK GOOD.Jul 31, 1996 · N1078G · Bell 206L1SDR HEEA967603Transceiver · failedNO OUTPUT POWER. FOUND WHEN UNIT TURNED TO STANDBY, UNIT TURNS OFF. REPLACED SWITCH BOARD ASSEMBLY. REPAIRED PROBLEM. REPLACED PHOTOCELL V301 DUE TO BEING WEAK. REPAIRED. BENCH CHECK GOOD.Jul 31, 1996 · N967MB · Bolkms BO105SSDR HEEA967602Transceiver · defectiveRIGHT KNOB BROKEN. REPLACED BROKEN FACEPLATE ASSEMBLY. ALSO REPLACED DEFECTIVE V101 CAVITY OSCILLATOR DUE TO FREQUENCY DRIFT. UNIT BENCH CHECK GOOD.Jul 31, 1996 · N4180F · Bell 206L3SDR COMA9610223Controller · failedTRANSPONDER NR 1 AND NR 2 REPORTED INOPERATIVE BY AIR TRAFFIC CONTROL. REPLACED CTL-92.Jul 12, 1996 · N247CA · Emb EMB120RTSDR HEEA967431Transceiver · failedWILL NOT REPORT. FOUND UNIT DRAWS EXCESSIVE CURRENT. REPLACED CAVITY OSCILLATOR V101. REPAIRED. ADJUSTED PULSE WIDTH AND FREQUENCY. BENCH CHECK GOOD.Jun 21, 1996 · N2269A · Bell 206BSDR HEEA967414Transceiver · defectiveR/H KNOB BROKEN. REPLACED KNOB. REPAIRED. UNIT HAS LOW POWER OUT AND CANNOT ADJUST POWER UP TO SPECS. REPLACED CAVITY OSCILLATOR V101. REPAIRED. ADJUSTED PULSE WIDTH. BENCH CHECK GOOD.Jun 13, 1996 · N31077 · Bell 206L3SDR HEEA967365Transceiver · defectiveNO IDENT LIGHT AND NO LIGHT ON TEST. REPLACED PHOTOCELL V201. REPAIRED. REPLACED DETERIORATED RESISTOR R477. ADJUSTED POWER OUT AND FREQUENCY TO SPECS. BENCH CHECK GOOD.Jun 5, 1996 · N22743 · Bell 206BSDR HEEA967331Transponder · defectiveTRANSPONDER DROPS OFF LINE INTERMITTENTLY.Jun 4, 1996SDR HEEA967301Transponder · malfunctionATC UNABLE TO RECEIVED MODE C. FOUND LOW POWER OUT. TRIED ADJUSTING POEWR TO SPECS. REPLACED CAVITY TUBE V101. REPAIRED. ADJUSTED FREQUENCY. BENCH CHECK GOOD.May 31, 1996 · N911TL · Bolkms BK117B1SDR AU960735Transponder · faulty(AUS) TRANSPONDER NOT WORKING - INVESTIGATION FOUND OFF/ON/MODEC/TEST SELECTOR ON FRONT FACE NOT CONNECTED TO SWITCH WAFER ON PCB DUETO OVERLOAD FAILURE OF THE SWITCH SHAFTMay 30, 1996 · Piper PA28151SDR AU960705Transponder · faulty(AUS) TRANSPONDER FAILED DUE TO UNSERVICEABLE CAVITYMay 17, 1996 · Cessna 182R
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