JASC 2434
Service difficulty reports · 849
Reports filed under 2434 · DC Generator-Alternator, 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 = '2434' 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 = '2434' 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 CA960924024Brushes · high resistance(CAN) AIRCRAFT ALTERNATORS WOULD NOT BALANCE. INSPECTION REVEALED A HIGH FIELD RESISTANCE. THE BRUSHES WERE FOUND TO HAVE A RESISTANCE OF 15-30 OHMS. REPLACEMENT BRUSHES SOLVED THE PROBLEM. SUBMITTER STATES THAT THIS IS THE THIRD SUCH OCCURRENCE.SDR 96ZZZX4372Alternator · wire brokenRIGHT ALTERNATOR 'FAIL' LIGHT FLICKERED AND CAME ON IN-FLIGHT, ALTERNATOR SHOWED TO HAVE CORRECT OUTPUT. REMOVED SAME WITH ANOTHER. AFTER 38 HOURS, THE REPLACEMENT ALTERNATOR HAD THE SAME PROBLEM. CALLED ELECTRO SYSTEMS AND CONVEYED PROBLEM TO SERVICE REP. SDR 97ZZZX279Alternator · failedPILOT REPORTED LT ALTERNATOR LIGHT FLICKERED DURING TURBULENCE. LIGHT CAME ON STEADY ON THE WAY TO MAINTENANCE. REMOVED ALTERNATOR, HEARD SOMETHING RATTLING INSIDE. REMOVED COOLING SHROUD AND FOUND ONE BRUSH INSIDE. REMOVED BRUSH BLOCK AND FOUND A PIECE OFSDR 96ZZZX4757Alternator · inoperativeALTERNATOR FAILED WITHIN 40 HOURS OF OVERHAUL. A/E SN: A-80319. ARSNV2R045L.SDR CA961003002Alternator · failed(CAN) THE AIRCRAFT RETURNED WITH A DEAD BATTERY. THE ALTERNATOR WAS FOUND TO HAVE NO OUTPUT. ALTERNATOR REPLACED AND THE AIRCRAFT RETURNED TO SERVICE.SDR CA960909011Generator · hot(CAN) WHILE IN CRUISE FLIGHT, THE RIGHT HAND GENERATOR LIGHT CAME ON, FOLLOWED BY RIGHT HAND GENERATOR HOT LIGHT. THE ENGINE WAS SECURED AND THE AIRCRAFT RETURNED TO THE AIRPORT FOR AN UNEVENTFUL LANDING. THE GENERATOR WAS REPLACED AND THE AIRCRAFT RETURNED TOSDR CA960826080Bearing · seized(CAN) GENERATOR LIGHT ILLUMINATED IN FLIGHT. AIRCRAFT LANDED AND MAINTENANCE FOUND THE BEARINGS SEIZED. ALTERNATOR REPLACED AND AIRCRAFT RETURNED TO SERVICE.SDR 96ZZZX4133Alternator · lug brokenWHILE COMPLETING 100-HOUR FACTORY INSPECTION, FOUND ALTERNATOR MOUNT LUG ON LEFT ALTERNATOR BROKEN, ALTERNATOR SYSTEM WAS OPERATING. MOUNTING LUG WAS BROKEN OFF CASE OF ALTERNATOR. EXCHANGE ALTERNATOR INSTALLED.SDR AU961096Bearing · loose(AUS) RH ENGINE DRIVEN ALTERNATOR SLIP RING END BEARING LOOSE IN END HOUSING - BEARING HOUSING SUPPORT WEBS CRACKED AND BROKENSDR 96ZZZX4391Generator · failedTHE AIRCRAFT EXPERIENCED VIBRATIONS AND AMP FLUCTUATIONS. THE PROBLEM WAS ISOLATED TO THE RIGHT GENERATOR. GENERATOR REMOVAL REVEALED BEARING FAILURE. THIS WAS THE SECOND FAILURE WITHIN 200 FLIGHT HOURS OF OVERHAUL. THE LEFT GENERATOR, S/N 2400, HAD THE IDSDR 96ZZZX3889Alternator · defectiveALTERNATOR REPORTED TO BE 'FACTORY NEW' MISSING SHAFT-TO-DRIVE-COUPLING O-RING, P/N AN123864. MISING DRIVE-END SEAL, P/N 352068. ROTOR 'DRAGS' AND BINDS WHEN SPUN BY HAND. PROBLEMS FOUND DURING ROUTINE NEW PARTS INSPECTION.SDR AU961071Wire · worn(AUS) NO4 GENERATOR FEED WIRE CHAFED THROUGH BY CONTACT WITH CARGO ACCESS DOOR UPPER LATCHSDR CA960715011Alternator · broken shaft(CAN) THE ALTERNATOR DRIVE SHAFT FAILED AT THE BASE OF THE ALTERNATOR. THIS SHAFT APPEARED TO BE CRACKED OR HAD A PREVIOUS FLAW. THIS ALLOWED THE REMAINING SHAFT AND DRIVE GEAR TO MOVE FORWARD RUBBING ON THE CAM GEAR. THE RUBBER BUSHING, P/N 632050, AND METAL SDR AU960902Generator · disintegrated(AUS) NO1 ENGINE DRIVEN GENERATOR DISINTEGRATED - DAMAGE CAUSED TO NO1 ENGINE THROTTLE CABLE - INVESTIGATION FOUND DEFORMATION OF THE BACK PLATE CASTING WHICH MAY HAVE ALLOWED A MISALIGNMENT RESULTING IN INTERNAL FAILURESDR AU961162Bearing · loose(AUS) ALTERNATOR SLIP RING END BEARING INNER RACE LOOSE ON ROTOR SHAFTSDR AU961034Generator · faulty(AUS) RH DC GENERATOR FAULTYSDR 96ZZZX4390Generator · failedTHE AIRCRAFT EXPERIENCED VIBRATION THEN GENERAL FAILURE ON THE RIGHT SIDE. BEARING FAILURE WAS THE CAUSE OF THE PROBLEMS. THIS WAS THE SECOND TIME IN 130 FLIGHT HOURS SINCE GENERATOR OVERHAUL.SDR 96ZZZX3544Pulley · separatedDRIVE PULLEY FOUND SEPARATED FROM VENT FAN DURING UNSCHEDULED MAINTENANCE. ALTERNATOR, 386.7 HOURS SINCE OVERHAUL. PULLEY TIME UNKNOWN. CORROSION EVIDENT ON MATING SURFACES OF DETACHED PIECES.SDR 96ZZZX3382Brush Block · excess wearDISASSEMBLY AFTER ALTERNATOR FAILURE REVEALED PREMATURE AND EXCESSIVE WEAR ON BRUSHES. TIME SINCE OVERHAUL 141.0 HOURS. SUBMITTER STATED POSSIBLE DEFECTIVE BRUSHES OR IMPROPER INSTALLATION.SDR 96ZZZX3089Bearing · failedCATASTROPHIC BEARING FAILURE OF ALTERNATOR ON RIGHT ENGINE AFTER TAKEOFF. PILOT RETURNED TO AIRPORT WITHOUT COMMUNICATION RADIOS. ONLY ADF AND GPS WAS STILL WORKING. PILOT REPORTED SEEING SPARKS FROM THE ALTERNATOR AND INTERIOR LIGHT FLICKERED. RADIOS WENTSDR 96ZZZX5119Alternator · malfunctionPILOT ATTEMPTED START, START SOLENOID CLICKING. LOW BATTERY OUTPUT TO LOW TO CLOSE SOLENOID. ALTERNATOR CHECKED FOR CHARGING. ALTERNATOR OUTPUT APPROXIMATELY 19.3 VDC FOR 24 VDC SYSTEM. ALTERNATOR REPLACED WITH OVERHAULED UNIT.SDR AU960622Generator · faulty(AUS) NO1 GENERATOR FAILED AND DROPPED OFF LINE - INTERMITTENT APU DELAY OFF SYSTEMSDR CA960515009Tie Bolt · broken(CAN) ALTERNATOR CASE TIE BOLT BROKEN IN THREADED AREA, 1/2 INCH FROM THE END OF THE BOLT. THIS IS THE 3RD SIMILAR OCCURRENCE ON THIS AIRCRAFT. PREVIOUS CASES WERE ON DIFFERENT S/N ALTERNATORS.SDR AU960709Alternator · faulty(AUS) LH ENGINE DRIVEN ALTERNATOR FAULTY - ALTERNATOR HOUSING LOOSE DUETO LOOSE RETAINING BOLTS AND A WORN ALTERNATOR ATTACHMENT HOUSING- THE REPLACEMENT ALTERNATOR WAS SUPPLIED WITHOUT TAGS AND ON INSPECTION WAS FOUND TO BE INCORRECTLY ASSEMBLED AND THE ATTASDR AU960684Bearing · failed(AUS) RH ENGINE ALTERNATOR BEARINGS DESTROYED - DRIVE AND DRIVEN GEARS DAMAGED - METAL CONTAMINATION OF OIL SYSTEMSDR 96ZZZX3408Brush Kit · failedCOMPONENT WAS RECENTLY OVERHAULED. INSPECTION REVEALED BRUSHES WERE INSTALLED UPSIDE DOWN CAUSING WEAR INTO BRUSH LEADS AND PREMATURE FAILURE. SUBMITTER STATED THIS IS THE FOURTH FAILURE IN THE LAST SIX MONTHS DUE TO IMPROPER BRUSH INSTALLATION. ALL UNITS WSDR 96ZZZX3079Alternator · fluctuationREMOVED ALTERNATOR DUE TO AMPMETER FLUCTUATION. INSPECTED AND DETERMINED AUTOMOTIVE TYPE. COOLING FINS WERE INSTALLED IN OPPOSITE DIRECTION AS COMPARED TO O/H AERO ELECTRIC UNITS. ALTERNATOR REMOVED, HAD NO DATA PLATE OR ANY MARKINGS. UNIT REMOVED AND DISCSDR 96ZZZX2767Rotor Assy · shaft shearedC/W REMOVAL OF ALTERNATOR FOR 500-HOUR INSPECTION. UPON DISASSEMBLY, ROTOR SHAFT SHEARED OFF IN AREA OF NUT (PULLEY RETAINING) THREADS. EVIDENCE OF CRACK BEING VERY OLD EXISTS. MATERIAL CORRODED IN AREA OF CRACK (SHEAR AREA).SDR AU960556Diode · faulty(AUS) LH ALTERNATOR DIODES LOOSE AND BROKENSDR 96ZZZX2877Alternator · fan failedLEFT ALTERNATOR COOLING FAN FAILED. FAN APPEARS TO HAVE LOST FIT BETWEEN SHAFT SHOULDER AND PULLEY. FAN BECAME OFF-CENTER AND BROKE THROUGH/SEPARATED SHAFT. FOUND FAN SEPARATED FROM ALTERNATOR AND LODGED BETWEEN ALTERNATOR BRACKET AND STARTER RING GEAR.SDR CA960530002Fan · broken(CAN)PILOT HEARD LOUD BANG FOLLOWED BY AMMETER SHOWING DISCHARGE. ALTERNATOR SEPARATED FROM ENGINE. HOUSING MOUNTING LUGS BROKEN OFF BY VIBRATION DUE TO IMBALANCE FOLLOWING A PORTION OF THE FAN BREAKING OF F.SDR COMA9610113Generator · failedRT ENGINE AUXILIARY GENERATOR FAILED. REPLACED THE AUXILIARY GENERATOR.SDR 96ZZZX2142Alternator · wrong partDURING THE COURSE OF AN ANNUAL INSPECTION, DISCOVERED A 24-VOLT ALTERNATOR WAS INSTALLED ON A 12-VOLT SYSTEM. PART INSTALLED WAS ALU-8421LS, 24-VOLT, 70-AMP. ACCORDING TO THE PARTS BOOK PER SERIAL NUMBER OF AIRCRAFT, UNIT SHOULD BE A P/N ALY6421, 12-VOLT, 60SDR CA960321012Alternator · shorted field(CAN)DURING CLIMB BOTH ALTERNATORS WENT OFF LINE. AN INSPECTION REVEALED THAT THE RIGHT HAND COOLING FAN HAD SEPARATED FROM THE ALTERNATOR AND SOME OF THE PIECES WERE FOUND INSIDE THE ALTERNATOR THUS SHORTING THE FIELD. THE SHORTED FIELD CAUSED A VOLTAGE REGULSDR 96ZZZX1937Alternator · inoperativeDURING FLIGHT, RT ALTERNATOR QUIT. INSTALLED OVERHAULED UNIT, ELECTRICAL SYSTEM OPERATED NORMALLY. SENT ALTERNATOR TO OVERHAUL SHOP AND HAD THEM RUN IT FIRST. THEY SAID UNIT WORKED OK. TOLD THEM TO OVERHAUL IT. HAVE NOT HAD ALTERNATOR PROBLEM SINCE. SUBMSDR 97ZZZX3330Alternator · bearing failedAFTER ONLY 20 HOURS OF TIME, ALTERNATOR BEARING FOUND FAILED WITH BELT TENSION OK. ALTERNATOR ALSO HAS HIGH RESISTANCE. UNIT OVERHAULED BY PRECISION ELECTRONICS, INC.SDR 96ZZZX2188Hub · failedSHORTLY AFTER START-UP, THE LEFT ALTERNATOR LIGHT ILLUMINATED. ACFT WAS SHUT DOWN AND INSPECTED. OUTBOARD BEARING OF ALTERNATOR FOUND FAILED. UPON ALTERNATOR REMOVAL, DRIVE HUB (PN 640934) WAS ALSO FOUND FAILED. THIS ALTERNATOR DOES NOT REQUIRE THE 100-HOUSDR 96ZZZX2187Bearing · failedSHORTLY AFTER START-UP, THE LEFT ALTERNATOR LIGHT ILLUMINATED. ACFT WAS SHUT DOWN AND INSPECTED. OUTBOARD BEARING OF ALTERNATOR FOUND FAILED. UPON ALTERNATOR REMOVAL, DRIVE HUB (PN 640934) WAS ALSO FOUND FAILED. THIS ALTERNATOR DOES NOT REQUIRE THE 100-HOUSDR AU960548Bearing · failed(AUS) ALTERNATOR REAR BEARING FAILED - BRUSHES WORN OUTSDR 96ZZZX1097Control Unit · failedPILOT REPORTED LOSS OF ELECTRICAL POWER. AFTER LANDING, UNCOWLED ENGINE AND FOUND THE ACU WAS SMOKED. TROUBLESHOT AND FOUND THE ALTERNATOR WINDINGS OPEN. INSTALLED A NEW ACU AND INSTALLED A SERVICEABLE ALTERNATOR, PN C611503-0102. PERFORMED GROUND RUN, OPESDR 96ZZZX1536Alternator · warning lightLOW VOTLAGE LIGHT WITH FULL LOAD. (PROP ICE, PITOT HEAT). AIRCRAFT LANDED. MECHANIC INSPECTED ALTERNATOR ATTACHMENTS, WIRING, AND BELT TENSION. NO DISCREPANCIES WERE NOTED. AIRCRAFT WAS TEST RUN ON THE GROUND AT SEVERAL POWER SETTINGS AND VARIOUS LOADS. SDR CA960223006Drive Assembly · poles adrift(CAN)CUSTOMER BROUGHT IN THE ALTERNATOR FOR TEST AND REPAIR. DISASSEMBLY FOUND THE ROTOR ASSEMBLY LOOSE FROM THE SHAFT AND ABLE TO ROTATE ON THE SHAFT ABOUT 10 DEGREES.SDR AU960165Condenser · faulty(AUS) ALTERNATOR CONDENSER FAULTY - OUTER CASING WAS HOLED DUE TO WEAR CAUSED BY BEING LOOSE IN THE CLAMP BRACKET - PERSONNEL/MAINTENANCE ERRORSDR CA960202015Tie Bolt · broken(CAN)PILOT REPORTED AN INCREASING WHINING OVER THE HEADSET FOLLOWED BY THE #2 ALTERNATOR LIGHT ILLUMINATING. #2 ALTERNATOR SHUT DOWN AND THE AIRCRAFT FINISHED FLIGHT. MAINTENANCE FOUND THE LOWER ALTERNATOR TIE BOLT BROKEN AND WAS FOUND IN THE LOWER COWL AREA. SDR CA960126001Generator · lightning strike(CAN)DOUBLE LIGHTNING STRIKE ON DEPARTURE. DOUBLE DC GENERATOR FAILURE. EMERGENCY CHECK LIST CARRIED OUT. BOTH GENERATORS CAME BACK ON LINE. FIVE STATIC WICKS HAD TO BE REPLACED.SDR 96ZZZX888Brush Holder · brokenRIGHT ENGINE GENERATOR INOPERATIVE. FOUND BRUSH HOLDER BROKEN AND PIECES HAD SHORTED OUT ARMATURE. INSTALLED REBUILT UNIT.SDR 96ZZZX812Generator · failedCATASTROPHIC FAILURE OF NR 1 DC GENERATOR. LOG BOOKS WERE NOT AVAILABLE, BUT ESTIMATED TSO TO BE 45-50 HOURS. CAUSE UNKNOWN DUE TO SEVERE DAMAGE OF THE GENERATOR.SDR 96ZZZX597Generator · brushes failedGENERATOR WENT 'OFF LINE'. DISASSEMBLY FOUND BRUSH LEADS CUT AND FRAYED BY BRUSH HOLDERS. REAR BEARING FOUND LOOSE IN REAR HOUSING CAUSING ROTATIONAL VIBRATION WHICH CAUSED BRUSH LEADS TO HIT BRUSH HOLDERS.SDR CA960205013Controller · failed(CAN)DURING CRUISE #1 & #3 GENERATORS DROPPED OFF LINE. #2 GENERATOR INDICATED LOW FREQUENCY. #1 LOAD FREQUENCY CONTROLLER AND GENERATOR CONTROL UNIT REPLACED. #3 GENERATOR CONTROL UNIT REPLACED.SDR AU960038Brush · worn(AUS) ALTERNATOR BRUSHES WORN EXCESSIVELY - PIGTAIL JUNCTION WORN INTO SLIP RING
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