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 HEEA966387Stator · mis ohauledSTATOR BRUSH LEADS ARE TOO SHORT TO REACH BRUSH BOX SCREWS. RECEIVED REWOUND 3-23-95.SDR 97ZZZX481Drive · failedPILOT REPORTED WHILE EN ROUTE, STAND-BY POWER OFF LIGHT ILLUMINATED. THE STAND-BY ALTERNATOR POWER WAS CHECKED AND STAND-BY POWER DID NOT COME ON LINE. MAINTENANCE WAS DISPATCHED TO THE AIRCRAFT AND CONFRIMED STAND-BY POWER FAILURE. THE STAND-BY ALTERNATOR SDR 96ZZZX755Rotor Assy · failedDC GENERATOR SOLD AS OVERHAULED EXCHANGE UNIT. FAILED IN-FLIGHT. BEARINGS DID NOT FAIL. SUSPECT THE ROTOR ASSY RETAINING BAND/BANDS SEPARATED CAUSING SEVERE DAMAGE TO THE GENERATOR SUB-ASSEMBLIES. FUTURE OVERHAULS/REPAIRS WILL REQUIRE 10X MAG AND PROBE INSSDR 96ZZZX463Alternator · pulley backwardsALTERNATOR PULLEY INSTALLED BACKWARDS ON SHAFT. THIS WAS A NEWLY OVERHAULED UNIT RECEIVED FROM OVERHAULER.SDR 96ZZZX476Bearing · failedDRIVE END BEARING ON ALTERNATOR FAILED DUE TO MAIN RING GEAR FAILURE ON ENGINE.SDR CA960212024Alternator · faulty(CAN)INSPECTION REVEALED THE TWO ALTERNATORS TO BE FAULTY. ONE DID NOT FUNCTION AT ALL, AND THE OTHER ONLY VERY WEAKLY. BATTERY 6-35 DID NOT CHARGE FULLY AFTER LONG CHARGING HOURS. THE BATTERY PROBABLY WASNOT AT MAXIMUM CHARGE LEVEL FOR MANY FLIGHT HOURS, THUSSDR 95ZZZX7032Alternator · seizedWHEN REPLACING THROWN ALTERNATOR DRIVE BELT, MECHANICS NOTICED ALTERNATOR DAMAGE DUE TO FAILED BEARINGS, ROTOR CONTACTS, STATOR FRAME, AND BINDS.SDR 95ZZZX6748Alternator · broken lugCHRYSLER ALTERNATOR - BROKEN LUG.SDR 96ZZZX844Generator · failedREMOVED GENERATOR, S/N 1187, DUE TO WHINE HEARD OVER SPEAKERS ON 9-27-95. IT HAD 593.3 HOURS SINCE OVERHAUL. INSTALLED GENERATOR, S/N 2632, 9-27-95 WITH ZERO HOURS SINCE OVERHAUL.SDR 96ZZZX838Generator · failedREMOVED, S/N 2632, GENERATOR ON 10-17-95 DUE TO FAILURE (SHORTED BETWEEN 'D' AND 'E' POSTS). IT HAD ONLY 13.1 HOURS SINCE OVERHAUL. INSTALLED ANOTHER OVERHAULED GENERATOR, S/N 1333.SDR CA951031202Retaining Ring · chafed(CAN)INCORRECTLY INSTALLED RETAINING NUTS CAUSED DAMAGE TO BEARING SHIELD/SEAL AND RESULTING IN POSSIBLE BEARING CONTAMINATION WITH FRAGMENTS OF METAL THAT SEPARATED FROM THE SHIELD.SDR 95ZZZX6005Alternator · defectiveALTERNATOR LIGHT CAME ON DURING FLIGHT. TESTED AND FOUND DEFECTIVE.SDR 95ZZZX6004Alternator · defectiveALTERNATOR LIGHT CAME ON DURING FLIGHT. TESTED AND FOUND DEFECTIVE.SDR 95ZZZX6003Aternator · defectiveALTERNATOR LIGHT CAME ON DURING FLIGHT. TESTED ALTERNATOR AND FOUND TO BE DEFECTIVE.SDR 96ZZZX987Generator · defectiveGENERATOR DISENGAGES, LIGHT ON, NO AMP INDICATION.SDR 95ZZZX5957Generator · shortedINVESTIGATION FOR COCKPIT ODOR FOUND UPON OPENING THE BATTERY COMPARTMENT, THE BATTERY WAS EXTREMELY HOT AND MOST OF THE ELECTROLYTE HAD BOILED OUT. TROUBLESHOOTING REVEALED THE FIELD COIL HAD GROUNDED OUT IN THE GENERATOR.SDR 96ZZZX986Generator · defectiveNR 2 GENERATOR WILL NOT COME ON LINE.SDR 95ZZZX5738Alternator · failedPILOT REPORTED COMPLETE COMM FAILURE AS WELL AS TRANSPONDER REPORTED INOP BY ATC. PILOT RETURNED TO FRG WITHOUT INCIDENT. INSPECTED AND FOUND BATTERY VOLTAGE BELOW 10 VOLTS. STARTED AIRCRAFT WITH GPU. ALTERNATOR LIGHT WAS ILLUMINATED. ALTERNATOR WAS REMOVESDR 95ZZZX5881Generator · stator failedRT ENGINE STARTED A SEVERE VIBRATION AND DC GENERATOR FAIL LIGHT CAME ON. TEMP RISING (OIL). SHUT DOWN ENGINE. TEAR DOWN REPORT FOUND EXPLODED STATOR WINDING. SWELLING OF THE WINDING MADE THE ROTOR BIND AND RUB AND CAUSED THE HOUSING TO BREAK. BOTH BEARINSDR 95ZZZX3859Alternator · wire burnedALTERNATOR SHORTED INTERNALLY IN-FLIGHT CAUSING SMOKE IN COCKPIT. PILOT MADE EMERGENCY LANDING. INSPECTED AIRCRAFT, FOUND ALTERNATOR OUTPUT TERMINAL SHORTED TO GROUND. THERE IS NO CIRCUIT PROTECTION ON ALTERNATOR OUTPUT CIRCUIT. THIS CAUSED WIRING TO BURN SDR 95ZZZX3812Fan · crackedALTERNATOR COOLING FAN CRACKED AT CENTER MOUNT AREA. THIS CANNOT BE INSPECTED UNLESS THE PULLEY AND COOLING FAN ARE REMOVED. FAN FAILURE WAS IMMINENT.SDR 95ZZZX4563Alternator · bearing wornDURING ANNUAL INSPECTION FOUND FAN, (INTERNAL), RUBBING HOUSING. ROTOR WOULD MOVE FORE AND AFT .25 INCH TO .3750 INCH AND UP AND DOWN SAME AMOUNT. SUSPECT BEARINGS AND HOUSING WORN OUT.SDR HEEA955212Contactor · defective#1 GENERATOR WILL NOT COME ON LINE.SDR 95ZZZX3473Casting · crackedFOUND FORWARD CASTING OF ALTERNATOR CRACKED ADJACENT TO MOUNTING FLANGE SUPPORT BRACE. SUBMITTER KNOWS OF OTHER INSTANCES OF CRACKS IN THIS AREA ON SAME MAKE AND MODEL ALTERNATORS. FRAME IS CRACKED FROM FORWARD TO AFT ENDS ALL THE WAY THROUGH.SDR 95ZZZX3133Brush · wornPILOT EXPERIENCED ALTERNATOR FAILURE WHILE ON IFR FLIGHT PLAN. LANDED WITHOUT INCIDENT. MECHANIC REPLACED BRUSHES IN ALTERNATOR AND RETURNED AIRCRAFT TO SERVICE.SDR 95ZZZX3476Alternator · failedINSTRUCTOR NOTED NOISE AND SMOKE FROM ALTERNATOR. UPON INSPECTION, ALL BOLTS AND SAFETY WIRES WERE IN PLACE. BELT LOOKED GOOD ALONG TOTAL SURFACE. BEFORE RUN-UP, DECIDED TO GRAB AND SHAKE IT, NOTICED FRONT HALF OF ALTERNATOR MOVING AWAY FROM REAR HALF. CASSDR 95ZZZX2885Fan · crackedALTERNATOR FAN WAS SUSPECTED TO BE CRACKED DUE TO FACE PLATE RUBBING THE DRIVE BELT. ALTERNATOR WAS REMOVED AND FAN DISASSEMBLED. THERE WAS A CRACK FROM OUT OF THE DRIVE KEY HOLE, SPIRALING APPROXIMATELY ONE-HALF WAY AROUND THE FAN THEN GOING STRAIGHT TO A BLSDR 95ZZZX3664Alternator · bearing foiledTHE ALTERNATOR BEARING FAILED DURING FLIGHT AND FILLED THE COCKPIT WITH A SMOKE ODOR. THE ALTERNATOR HAD ACCUMULATED 251 HOURS SINCE OVERHAUL.SDR 95ZZZX5216Alternator · failedALTERNATOR FAILED IN-FLIGHT. ACFT LANDED AND REPLACED THE ALTERNATOR. NO OBVIOUS DAMAGE.SDR 95ZZZX3507Alternator · failedALTERNATOR FAILED IN-FLIGHT. LANDED AND REPLACED. NO OBVIOUS DAMAGE.SDR 95ZZZX1919Brush · wornONE DC GENERATOR FAILED IN-FLIGHT. MAINTENANCE PERSONNEL FOUND THE DC GENERATOR TO HAVE PREMATURE BUSH WEAR (75 PERCENT WORN). OVERHAULED BY A REPAIR STATION. CAUSE OF BRUSH WEAR NOT DETERMINED. BRUSH PART NUMBER NOT DETERMINED, SUSPECT DEFECTIVE BRUSHES OSDR 95ZZZX1920Brush · wornBLACK STREAKS WERE NOTICED ON THE ENGINE COWLING BY MAINTENANCE PERSONNEL. FOUND THE DC GENERATOR TO HAVE PREMATURE BRUSH WEAR, WORN BEYOND LIMITS (NO WEAR MARK REMAINING - 100 PERCENT WORN). RECENT OVERHAUL BY REPAIR STATION, CAUSE OF WEAR NOT DETERMINED. SDR 95ZZZX1772Bearing · failedALTERNATOR FAILED DUE TO REAR BEARING FAILURE. SUBMITTER SUGGESTS A NEED FOR DIFFERENT DESIGN ON REAR BEARING.SDR 95ZZZX1774Bearing · galledINSPECTION FOUND ALTERNATOR WITH INNER RACE OF BEARING GALLED. SUBMITTER STATES A NEED FOR A NEW DESIGN BEARING.SDR 95ZZZX1447Drive · shearedPILOT REPORT: INTERMITTENT ALT OPS REMOVED AND INSPECTED. FOUND SHAFT SHEARED ON ALTERNATOR.SDR 95ZZZX1921Brush · wornBLACK STREAKS WERE NOTICED ON THE ENGINE COWLING BY MAINTENANCE PERSONNEL. FOUND THE D. C. GENERATOR TO HAVE PREMATURE BRUSH WEAR, WORN BEYOND LIMITS (NO WEAR MARK REMAINING - 100 PERCENT WORN). RECENT OVERHAUL BY REPAIR STATION. CAUSE OF BRUSH WEAR COULD NSDR 95ZZZX1773Bearing · failedBEARING ROLLERS FAILED. SUBMITTER STATES THIS BEARING HAS ALWAYS BEEN THE WEAK SPOT IN THESE ALTERNATORS. IT IS GETTING WORSE. REAR HOUSING SHOULD BE DESIGNED TO ACCEPT A BETTER, MORE STABLE BEARING.SDR 95ZZZX1691Brush · wornON ORIGINAL FACTORY UNIT, FOUND BRUSH HOLDER NOT CORRECTLY ALIGNED WITH SLIP RINGS CAUSING BRUSH TO RIDE OFF OF EDGE ONTO PHENOLIC INSULATOR. THIS CAUSES 'ALT. OUT' CONDITION. SUBMITTER SUGGESTS FACTORY CHECK SLIP RING POSITION ON ROTOR SHAFT TO ASSURE CORRESDR BIER950006Bolt · wornDURING MAINTENANCE FOR UNRELATED ALTERNATOR PROBLEM, FOUND TOP ALTERNATOR BOLT (PN 401 424) WORN APPROX 20 PERCENT THROUGH. HAVE SEEN THIS NUMEROUS TIMES BEFORE AND BELIEVE THIS TO BE CAUSED BY THE FRONT AND/OR REAR BUSHING(S) (PN 753 380) BECOMING LOOSE AND SDR 96ZZZX4734Alternator · failedPILOT REPORTED ALTERNATOR FAILED EN ROUTE. UPON TROUBLESHOOTING FOUND FORWARD BEARING HAD FAILED. REPLACED WITH OVERHAULED UNIT.SDR 95ZZZX1216Alterantor · defectivePILOT REPORT: RIGHT ALT INOP. FOUND PLUS TERMINAL ON ALTERNATOR LOOSE IN CASE. DIODE BLOCK SEEMED LOOSE INTERNALLY. POSITIVE LEAD AT CURRENT LIMITER HAD A LOOSE TERMINAL (CRIMPED AMP CONNECTOR) LOOSE ON WIRE. BRUSHES APPEARED GLAZED.SDR 95ZZZX1215Alternator · failedLEFT ALTERNATOR FAILED IN FLIGHT. APPEARS END BEARING FAILED CAUSING ROTOR TO WOBBLE, IN TURN, FRONT BEARING FAILED AND, PN 640934, HUB ASSY WAS SEVERELY DAMAGED. ALTERNATOR WAS OVERHAULED BY CLYDESDALE ENGINE IN COLUMBUS, OHIO.SDR 95ZZZX1003Bearing · failedBEARING INNER RACE DOES NOT SEEM TO BE PROPERLY HARDENED. MARKINGS ON BEARING: PEER TRI 13307E JAPAN.SDR 95ZZZX1273Bearing · failedBEARING INNER RACE DOES NOT SEEM TO BE PROPERLY HARDENED. MARKINGS ON BEARINGS: PEER TRI 13307E JAPAN.SDR 95ZZZX1029Alternator · miswiredWHEN TURNING ON EITHER AIRFRAME ANTI-ICE OR DE-ICE, BOTH ALTERNATORS FELL OFF LINE. INTERIOR OF AIRCRAFT FILLED WITH SMOKE. ALTERNATORS WERE WIRED INCORRECTLY TO THE AIRCRAFT. SMOKE CAUSED BY ALTERNATOR PHASE BEING OUT. RECOMMENDATION: PROPER TRAINING ON SDR 95ZZZX650Alternator · failedCATASTROPHIC FAILURE OF OUTER BEARING. ACFT WAS CLIMBING OUT AFTER TAKEOFF. PILOT SAW ALTERNATOR FAIL LIGHT COME ON. LOOKED OUT AT ENGINE NACELLE AND SAW SPARKS. PILOT RETURNED TO AIRPORT WITHOUT ANY INCIDENT. THE BEARING THAT FAILED IS EXPOSED TO THE ELEMSDR 95ZZZX1613Alternator · failedSUBMITTER STATES TO HAVE HAD NUMEROUS FAILURES OF THIS MODEL ALTERNATOR ON AIRCRAFT. IT IS UNUSUAL TO GET MORE THAN 100 HOURS OUT OF AN ALTERNATOR.SDR 95ZZZX909Alternator · inoperativeALTERNATOR OFF-LINE IN FLIGHT. PROBLEM TRACED TO BROKEN FIELD WIRE. FUNCTION CHECK OKAY AFTER REPAIRS.SDR 96ZZZX907Alternator · failedTHE LOSS OF THE LEFT ALTERNATOR FIELD CAUSED LEFT ALTERNATOR TO GO OFF-LINE AND TRIPPED THE REGULATOR WHICH CAUSED THE RIGHT ALTERNATOR TO GO OFF-LINE. SUBSEQUENTLY, BATTERY WAS DEPLETED AND LOSS OF ELECTRICAL POWER OCCURRED. WHEN PILOT SWITCHED REGULATORS,
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