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.
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
Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
SDR HEEA955989Transceiver · defectiveBENCH CHECK REQUIRED. INSPECTED AND TESTED. REPLACED CAVITY TUBE V101 DUE TO LOW POWER OUT. REPAIRED. ADJUSTED FREQUENCY AND ALIGNED RECEIVER TO SPECS. CLEANED CONTACTS ON ALL WAFER SWITCHES. BENCH CHECK GOOD.SDR HEEA955988Transceiver · failedNOT RECEIVED BY TOWER. FOUND POWER SLIGHTLY LOW AT ABOUT 150W. ADJUSTED POWER UP, FREQUENCY AND PULSE SHAPE. REPLACED DETERIORATED RESISTOR R477 AND DEFECTIVE PHOTODETECTOR V301. BENCH CHECK GOOD.SDR HEEA955987Transceiver · intermittentINTERMITTENT INOPERATIVE. REPLACED CAVITY OSCILLATOR V101 DUE TO LOW POWER OUT. REPAIRED. REPLACED PHOTOCELL V301 DUE TO WEAK REPLY LIGHT. REPAIRED. ALIGNED RECEIVER. ADJUSTED FREQUENCY AND PULSE WIDTH. CLEANED CONTACTS ON ALL WAFER SWITCHES. BENCH CHECSDR HEEA955986Transceiver · failedATC REPORTS NO SIGNAL FROM UNIT. UNIT HAS VERY WEAK POWER OUT. REPLACED CAVITY TUBE V101. REPAIRED. ADJUSTED FREQUENCY AND PULSE WIDTH. CLEANED CONTACTS ON ALL WAFERS. BENCH CHECK GOOD.SDR HEEA955985Transceiver · defectiveSECOND KNOB WILL NOT TURN INTERNAL NUMBER. REPLACED ONE KNOB SHAFT FROM SPARE. ALSO REPLACED V101 CAVITY OSCILLATOR THAT WAS WEAK. REPAIRED PROBLEM. BENCH CHECK GOOD.SDR HEEA955984Transceiver · defectiveTRANSMIT WEAK AND INTERMITTENT. TRIED ADJUSTING POWER BUT COULD NOT BRING IT UP TO SPECS. REPLACED CAVITY TUBE V101. REPAIRED. ADJUSTED FREQUENCY. FOUND UNIT TO HAVE WEAK RECEIVE. ALIGNED RECEIVER. REPLACED CAPACITOR C409. REPAIRED. BENCH CHECK GOOD.SDR HEEA955942Transponder · defectiveBENCH CHECK REQUIRED. INSPECTED AND TESTED TRANSPONDER. FOUND MTL TO BE BELOW SPECS. ALIGNED RECEIVER TO SPECS. REPAIRED PROBLEM. REPLACED PHOTOCELL V301 DUE TO WEAK REPLY LIGHT. REPAIRED. COOKED UNIT. BENCH CHECK GOOD.SDR COMA9511983Transponder · defectiveNR 2 TRANSPONDER INOPERATIVE. REPLACED THE NR 2 TRANSPONDER.SDR HEEA955871Transceiver · weakTRANSCEIVER REPORTED WEAK BY A.T.C.SDR HEEA955849Transponder · defectiveTROUBLESHOOTING C/H GOING OUT. UNIT WOULD NOT RECEIVE. FOUND HEAVY CORROSION AND FOUND INSULATOR BUSHINGS ON Q501 TRANSISTOR AND ON Q104 TRANSISTOR WERE BURNT. REPLACED BUSHINGS, CLEANED CORROSION AND APPLIED ALODINE. ALIGNED RECEIVER AND IF SECTIONS. ALSOSDR HEEA955847Transponder · inoperativeTRANSPONDER INOPERATIVE. FOUND PLASTIC INSULATOR BUSHING ON Q501 TRANSISTOR BURNT AND ARCING TO GROUND. REPLACED BUSHING TO REPAIR PROBLEM. ALIGNED RECEIVER AND IF SECTION TO SPECS. UNIT BENCH CHECK GOOD.SDR HEEA955840Transceiver · defectiveTRANSCEIVER ON-OFF KNOB BROKEN. REPLACED FACEPLATE ASSEMBLY THAT HAD BROKEN KNOB. ALSO REPLACED DEFECTIVE MIXER DIODE CR202. UNIT BENCH CHECK GOOD.SDR DHL95801006Transponder · inoperativeBRU - AFTER TAKEOFF, TRANSPONDER WAS REPORTED AS INOP BY ATC. REMOVED AND REPLACED ATC TRANSPONDER RT AND CONTROL HEAD IAW MM 34-53-0, OPS CHECK OK.SDR HEEA955666Transponder · inoperativeTRANSPONDER INOPERATIVE. TRIED ADJUSTING POWER UP TO SPECS. REPLACED CAVITY OSCILLATOR (V101). REPAIRED. ADJUSTED FREQUENCY. BENCH CHECK GOOD.SDR RAIA950840Atc Controller · failedSTL - FLT NR 7154 - LOST BOTH ATC TRANSPONDERS. MAINTENANCE REPLACED ATC CONTROLLER. TRANSPONDER CHECK REVEALED NORMAL OPERATION. (M)SDR HEEA955571Transceiver · inoperativeTRANSPONDER INOPERATIVE. OFF FREQUENCY. ADJUSTED FREQUENCY TO SPECS. REPAIRED. ALSO FOUND UNIT TO HAVE WEAK RECEIVE AND INTERMITTENT TRANSMIT. REPLACED MIXER DIODE CR202. REPAIRED WEAK RECEIVE. CLEANED CONNECTOR P202 AND WHERE CONNECTOR P202 FITS ON CAVISDR HEEA955566Transceiver · defectiveTRANSPONDER WILL NOT IDENT. RESOLDERED COLD SOLDER JOINT ON DIODE CR416. REPAIRED RECEIVE PROBLEM. FOUND -10 VOLTS ON -6 VOLT LINE. TROUBLESHOT AND FOUND C409 CAPACITOR DEFECTIVE. REPLACED CAPACITOR TO REPAIR -6V LINE. COMPLETED FUNCTION CHECK. ALSO INSTSDR HEEA955565Transceiver · failedTRANSPONDER NO SIGNAL. IDENT LIGHT VERY WEAK WHEN TESTED. REPLACED WEAK V101 CAVITY OSCILLATOR AND WEAK V301 PHOTODECTOR. REPAIRED PROBLEM. BENCH CHECK GOOD.SDR HEEA955564Transceiver · inoperativeTRANSPONDER INOPERATIVE. UNIT WOULD DRAW EXCESSIVE CURRENT. FOUND V101 CAVITY OSCILLATOR TO BE PROBLEM. REPLACED V101 CAVITY AND ALSO REPLACED WEAK V301 PHOTODETECTOR. BENCH CHECK GOOD.SDR 95ZZZX4208Transponder · failedUNIT LOCK UP, WILL NOT TRANSFER MODE 'A' CODES FROM STANDBY TO ACTIVE WINDOW. THIRD UNIT IN AIRCRAFT SINCE ORIGINAL PURCHASE IN APRIL, 1995. FIRST UNIT FAILED COMPLETELY OUT OF BOX. SECOND UNIT WORKED FOR 6 HOURS, THEN WOULD NOT REPLY. THIS UNIT WORKED FOR SDR HEEA955509Transceiver · defectiveBENCH CHECK NEEDED. INSPECTED UNIT. REPLACED DETERIORATED RESISTOR R477. REPLACED CRACKED FACEPLATE. REPLACED PHOTOCELL V301 DUE TO WEAK REPLY LIGHT. REPAIRED. ALIGNED RECEIVER AND PULSE WIDTH TO SPECS. CLEANED CONTACTS ON ALL WAFER SWITCHES. BENCH CHECSDR HEEA955500Transceiver · malfunctionDOES NOT REPORT. VERIFIED UNIT TO HAVE WEAK POWER OUT. REPLACED CAVITY OSCILLATOR V101. REPAIRED. REPLACED DETERIORATED RESISTOR R477. INSTALLED HEATSINK BEHIND TRANSISTOR Q415 AS PER KING SERVICE BULLETIN KT76A-6. REPLACED PHOTOCELL V301 DUE TO WEAK REPLSDR BUFA9516Xponder · inopFLT NR BVA924 - MIA-IAH - ATC XPONDER'S 1 AND 2 AND MODE C INOP. RETURNED TO MIA. REMOVED AND REPLACED ATCRT BOTH SYSTEMS, S/N 6615 AND 2860, OP CHECKED WITH ATTACHED TEST BOX IAW 34-42-00. (M)SDR 95ZZZX3986Knob · brokeON FIRST FLIGHT AFTER INSTALLATION, THE ON-OFF-MODE C SELECTOR BROKE OFF IN PILOT'S HAND. THIS IS THE THIRD TIME THERE HAVE BEEN BROKEN KNOBS ON THE 'NEW STYLE' FACEPLATE FOR THE KT76A. ALL THREE OCCURRENCES HAVE HAPPENED WITHIN ONE MONTH.SDR MALA95455Transponder · failedDTW - FLT 3318 - AFTER DEPARTURE, CREW NOTED THE ALTITUDE ENCODING TRANSPONDER WAS INDICATING 3,300 FEET HIGHER THAN THEIR ACTUAL ALTITUDE. THE AIRCRAFT RETURNED TO DTW WITHOUT INCIDENT. MAINTENANCE PERSONNEL REPLACED THE TRANSPONDER CONTROL UNIT. ALL SYSTESDR HEEA955402Transceiver · defectiveCRACKED FACEPLATE. REPLACED FACEPLATE. REPLACED PHOTOCELL V301 DUE TO WEAK REPLY LIGHT. INSTALLED HEATSINK BEHIND TRANSISTOR Q415 AS PER KING SERVICE BULLETIN KT76A-6. REPLACED DETERIORATED RESISTOR R477. FOUND UNIT TO HAVE WEAK POWER OUT. REPLACED CAVITYSDR HEEA955400Transceiver · inoperativeINOPERATIVE. WILL NOT GIVE OR RECEIVE. FOUND UNIT DID NOT TRANSMIT. REPLACED CAVITY OSCILLATOR V101. REPAIRED. REPLACED DETERIORATED RESISTOR R477. REPLACED PHOTOCELL V301 DUE TO WEAK REPLY LIGHT. REPAIRED. INSTALLED HEATSINK BEHIND TRANSISTOR Q415 AND SDR HEEA955397Transceiver · defectiveBENCH CHECK NEEDED. INSPECTED AND TESTED. REPLACED CRACKED FACEPLATE. REPLACED PHOTOCELL V301 DUE TO WEAK REPLY LIGHT. REPAIRED. REPLACED DETERIORATED RESISTOR R477. INSTALLED HEAT-SINK BEHIND TRANSISTOR Q415. FOUND UNIT TO HAVE WEAK POWER OUT. TRIED ADSDR HEEA955360Transceiver · defectiveDOESN'T REPLY. FOUND UNIT DOES NOT TRANSMIT OR RECEIVE. REPLACED OPEN RESISTOR R429 AND BAD DIODE CR404. REPAIRED RECEIVER PROBLEM. REPLACED CAVITY TUBE V101 DUE TO NO POWER OUT. REPAIRED. ALIGNED RECEIVER TO SPECS. REPLACED PHOTOCELL V301 DUE TO WEAK RESDR HEEA955356Transceiver · defectiveON/OFF KNOB BROKEN. REPLACED FACEPLATE ASSY. REPAIRED. FOUND UNIT TO HAVE NO BACKLIGHTING. REPLACED BURNT BULB DS302. REPAIRED. UNIT HAD LOW POWER OUT. TRIED ADJUSTING BUT COULD NOT ADJUST POWER OUT TO SPECS. REPLACED CAVITY TUBE V101. REPAIRED. ADJUSTSDR HEEA955328Transceiver · failedINOPERATIVE. FOUND THAT UNIT WOULD NOT RECEIVE OR TRANSMIT. REPLACED CAVITY TUBE V101. REPAIRED PROBLEM. ADJUSTED FREQUENCY AND ALIGNED RECEIVER TO SPECS. CLEANED CONTACTS ON ALL WAFERS. BENCH CHECK GOOD.SDR HEEA955327Transceiver · damagedFACEPLATE BROKEN. REPLACED FACEPLATE. REPAIRED. FOUND MTL TO BE WAY BELOW SPECS. REPLACED TRANSISTOR Q415. REPLACED DIODE CR407. REPAIRED. FOUND UNIT TO HAVE WEAK POWER OUT. TRIED ADJUSTING POWER OUT TO SPECS. NO HELP. REPLACED CAVITY TUBE 101. REPAIRSDR HEEA955326Transceiver · inoperativeINOPERATIVE. WONT IDENT. REPLACED TRANSISTOR Q415. REPAIRED. REPLACED DETERIORATED RESISTOR R477. INSTALLED HEATSINK BEHIND TRANSISTOR Q415. ADJUSTED FREQUENCY AND POWER OUT TO SPECS. BENCH CHECK GOOD.SDR HEEA955325Transceiver · inoperativeAPPEARS INOPERATIVE AND LIGHT DOES NOT COME ON DURING TEST. REPLACED PHOTOCELL V301. REPAIRED. REPLACED CRACKED FACEPLATE ASSY. REPLACED CAVITY TUBE V101 DUE TO LOW POWER OUT. INSTALLED HEATSINK BEHIND TRANSISTOR Q415 AND REPLACED DETERIORATED RESISTOR R47SDR HEEA955324Transceiver · defectiveOFF FREQUENCY. FOUND UNIT DID NOT POWER UP. REPLACED TRANSISTOR Q415. REPAIRED PROBLEM. INSTALLED HEAT SINK BEHIND TRANSISTOR Q415. REPLACED DETERIORATED RESISTOR R477. REPLACED PHOTOCELL V301 DUE TO WEAK REPLY LIGHT. ALSO ADJUSTED FREQUENCY TO SPECS.CLESDR HEEA955226Transceiver · inoperativeTRANSPONDER INOPERATIVE. REPLACED DETERIORATED RESISTOR R477. REPLACED PHOTOCELL V301 DUE TO WEAK REPLY LIGHT. FOUND SLS TO BE OUT OF SPECIFICATIONS. ALIGNED RECEIVER. REPAIRED. BENCH CHECK GOOD.SDR HEEA955192Transceiver · intermittentPILOT REPORTS INTERMITTENT OPERATION. FOUND POWER OUT TO BE 100 WATTS BELOW SPECS. ADJUSTED POWER OUT TO SPECS. REPAIRED. ADJUSTED FREQUENCY AND PULSE WIDTH. REPLACED DETERIORATED RESISTOR R477. REPLACED PHOTOCELL V301 DUE TO WEAK REPLY LIGHT. BENCH CHESDR HEEA955155Transponder · defectiveWILL NOT TEST; DOES NOT APPEAR TO HAVE POWER. UNIT WON'T TURN ON. REPLACED SWITCH BOARD ASSY. REPAIRED. UNIT WON'T TRANSMIT. REPAIRED BROKEN FOIL ON HIGH VOLTAGE POWER SUPPLY. REPAIRED. REPLY LIGHT TOO DIM. REPLACED V301 PHOTOCELL. REPAIRED.SDR HEEA955149Control Unit · defectiveFUNCTION SWITCH HAS NO STOPS. REPLACED BROKEN SWITCH CONTACT ASSY DUE TO STOPS BROKEN OFF. ALSO REPLACED DEFECTIVE TRANSFER SWITCH S103 AND I306 INTERGRATED CIRCUIT DUE TO STB AND ALT WOULD NOT LIGHT ON DISPLAY. REPAIRED.SDR HEEA955148Tranponder · defectiveTOP BROKEN. REPLACED BROKEN SWITCH BOARD ASSY AND BROKEN FACEPLATE. INSTALLED MISSING IDENT PUSH BUTTON. UNIT HAD WEAK POWER OUT. REPLACED CAVITY TUBE V101. REPAIRED. REPLACED PHOTOCELL V301 DUE TO WEAK REPLY LIGHT. FOUND UNIT TO HAVE WEAK RECEIVE. ALIGNSDR HEEA955081Transceiver · defectiveATC UNABLE TO READ IDENT. FOUND EXTRA NUMBERS ON SCOPE WHEN DIALING IN NUMBERS. CLEANED CONTACTS ON ALL WAFER SWITCHES. REPAIRED. FOUND POWER OUT VERY LOW. REPLACED CAVITY OSCILLATOR V101. REPAIRED. FOUND UNABLE TO SWITCH FROM ON TO STANDBY MODE. CLEANSDR HEEA955080Transceiver · defectiveTHE DIALED IN NUMBERS ARE NOT THE ONES RECEIVED. FOUND EXTRA NUMBERS ON SCOPE WHEN DIALING IN NUMBERS. CLEANED CONTACTS ON ALL WAFER SWITCHES. REPAIRED. ADJUSTED POWER OUT AND PULSE WIDTH. REPLACED WEAK PHOTOCELL V301. REPLACED CRACKED FACEPLATE. UNIT HASDR EGRA9593Transponder · defectiveIDENT BUTTON STICKS. REPLACED TRANSPONDER.SDR HEEA955013Transceiver · defectiveDOESN'T RECEIVE ON TRANSMIT. REPLACED CAVITY TUBE V101. REPAIRED. ADJUSTED PULSE WIDTH, FREQUENCY AND POWER OUT. BENCH CHECK GOOD.SDR HEEA954996Transceiver · wont testTRANSPONDER WILL NOT TEST. REPLACED WITH SERVICEABLE PART.SDR HEEA954983Transceiver · defectiveFACE COVER BROKE AND FALLING OFF. REPLACED FACEPLATE ASSY. FOUND UNIT TO HAVE WEAK POWER OUT. REPLACED CAVITY TUBE V101. REPAIRED. ADJUSTED PULSE WIDTH. BENCH CHECK GOOD.SDR HEEA954982Transceiver · defectiveDOES NOT REPLY. REPLACED V101 (CAVITY OSCILLATOR), REPAIRED. BENCH CHECK GOOD.SDR HEEA954981Transceiver · defectiveNEEDS BENCH CHECK. INSPECTED. INSTALLED HEATSINK BEHIND TRANSISTOR Q415 AS PER KING SERVICE BULLETIN KT76-A-6. REPLACED PHOTOCELL V301 DUE TO WEAK REPLY LIGHT. UNIT HAS WEAK POWER OUT AND UNABLE TO ADJUST FREQUENCY TO SPECS. REPLACED CAVITY TUBE V101. REPASDR HEEA954965Transponder · inoperativeINOPERATIVE. REPLACED WEAK V101 CAVITY OSCILLATOR, WEAK V301 PHOTOCELL AND WEAK CR202 MIXER DIIODE. ADJUSTED PULSE WIDTH AND FREQUENCY. BENCH CHECK GOOD.SDR HEEA954923Transceiver · defectiveNO TRANSMIT POWER. REPLACED V101 CAVITY OSCILLATOR. REPLACED BROKEN FACE-PLATE ASSY. LOCKING MECHANISM BROKEN; REPLACED SCREW, FLAT WASH AND GROOVE PIN. REPAIRED. ADJUSTED V101 AND MEETS MFGS SPECS.
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