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.

SDR HEEA966387Stator · mis ohauledSTATOR BRUSH LEADS ARE TOO SHORT TO REACH BRUSH BOX SCREWS. RECEIVED REWOUND 3-23-95.Jan 9, 1996 · Bolkms BO105SSDR 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 Jan 6, 1996 · N762FE · Cessna 208BSDR 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 INSJan 5, 1996 · N190DA · Lear 35ASDR 96ZZZX463Alternator · pulley backwardsALTERNATOR PULLEY INSTALLED BACKWARDS ON SHAFT. THIS WAS A NEWLY OVERHAULED UNIT RECEIVED FROM OVERHAULER.Dec 27, 1995SDR 96ZZZX476Bearing · failedDRIVE END BEARING ON ALTERNATOR FAILED DUE TO MAIN RING GEAR FAILURE ON ENGINE.Dec 18, 1995SDR 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, THUSNov 17, 1995 · Piper PA23250SDR 95ZZZX7032Alternator · seizedWHEN REPLACING THROWN ALTERNATOR DRIVE BELT, MECHANICS NOTICED ALTERNATOR DAMAGE DUE TO FAILED BEARINGS, ROTOR CONTACTS, STATOR FRAME, AND BINDS.Nov 6, 1995 · N627HA · Piper PA31350SDR 95ZZZX6748Alternator · broken lugCHRYSLER ALTERNATOR - BROKEN LUG.Nov 1, 1995 · N9900K · Piper PA28181SDR 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.Oct 27, 1995 · N127GT · Lear 55LEARSDR 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.Oct 27, 1995 · N127GT · Lear 55LEARSDR 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.Oct 19, 1995 · Lear 35LEARSDR 95ZZZX6005Alternator · defectiveALTERNATOR LIGHT CAME ON DURING FLIGHT. TESTED AND FOUND DEFECTIVE.Oct 5, 1995 · N3190H · Slnsby T67M260SDR 95ZZZX6004Alternator · defectiveALTERNATOR LIGHT CAME ON DURING FLIGHT. TESTED AND FOUND DEFECTIVE.Oct 5, 1995 · N3189W · Slnsby T67M260SDR 95ZZZX6003Aternator · defectiveALTERNATOR LIGHT CAME ON DURING FLIGHT. TESTED ALTERNATOR AND FOUND TO BE DEFECTIVE.Oct 5, 1995 · N3189K · Slnsby T67M260SDR 96ZZZX987Generator · defectiveGENERATOR DISENGAGES, LIGHT ON, NO AMP INDICATION.Sep 29, 1995 · N746H · Bell 214STSDR 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.Sep 21, 1995 · N3289S · Cessna 182GSDR 96ZZZX986Generator · defectiveNR 2 GENERATOR WILL NOT COME ON LINE.Sep 2, 1995 · N746H · Bell 214STSDR 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 REMOVEAug 15, 1995 · N250WA · Piper PA32300SDR 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 BEARINJul 27, 1995 · N86BE · Lear 35ASDR 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 Jul 25, 1995 · N76KF · Bbavia 8KCABSDR 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.Jul 11, 1995 · N711EB · Piper PA31350SDR 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.Jul 6, 1995 · N3023M · Piper PA28181SDR HEEA955212Contactor · defective#1 GENERATOR WILL NOT COME ON LINE.Jun 22, 1995 · N230UN · Bell 230SDR 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.Jun 21, 1995 · N5384F · Piper PA34200TSDR 95ZZZX3133Brush · wornPILOT EXPERIENCED ALTERNATOR FAILURE WHILE ON IFR FLIGHT PLAN. LANDED WITHOUT INCIDENT. MECHANIC REPLACED BRUSHES IN ALTERNATOR AND RETURNED AIRCRAFT TO SERVICE.Jun 8, 1995 · N8174X · Piper PA28236SDR 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. CASJun 1, 1995 · N739CD · Cessna 172SDR 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 BLMay 18, 1995 · N331MB · Piper PA31350SDR 95ZZZX3664Alternator · bearing foiledTHE ALTERNATOR BEARING FAILED DURING FLIGHT AND FILLED THE COCKPIT WITH A SMOKE ODOR. THE ALTERNATOR HAD ACCUMULATED 251 HOURS SINCE OVERHAUL.May 16, 1995 · N1769R · Cessna A185FSDR 95ZZZX5216Alternator · failedALTERNATOR FAILED IN-FLIGHT. ACFT LANDED AND REPLACED THE ALTERNATOR. NO OBVIOUS DAMAGE.May 11, 1995 · N6598B · Cessna 152SDR 95ZZZX3507Alternator · failedALTERNATOR FAILED IN-FLIGHT. LANDED AND REPLACED. NO OBVIOUS DAMAGE.May 11, 1995 · N6598B · Cessna 152SDR 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 OApr 4, 1995 · N125WM · Gulstm G1159SDR 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. Mar 30, 1995 · N900DH · Gulstm G1159SDR 95ZZZX1772Bearing · failedALTERNATOR FAILED DUE TO REAR BEARING FAILURE. SUBMITTER SUGGESTS A NEED FOR DIFFERENT DESIGN ON REAR BEARING.Mar 22, 1995SDR 95ZZZX1774Bearing · galledINSPECTION FOUND ALTERNATOR WITH INNER RACE OF BEARING GALLED. SUBMITTER STATES A NEED FOR A NEW DESIGN BEARING.Mar 20, 1995SDR 95ZZZX1447Drive · shearedPILOT REPORT: INTERMITTENT ALT OPS REMOVED AND INSPECTED. FOUND SHAFT SHEARED ON ALTERNATOR.Mar 17, 1995 · N758CM · Cessna R172FSDR 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 NMar 16, 1995 · N900DH · Gulstm G1159SDR 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.Mar 16, 1995SDR 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 CORREFeb 28, 1995SDR 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 Feb 27, 1995 · N43595 · Piper PA28236SDR 96ZZZX4734Alternator · failedPILOT REPORTED ALTERNATOR FAILED EN ROUTE. UPON TROUBLESHOOTING FOUND FORWARD BEARING HAD FAILED. REPLACED WITH OVERHAULED UNIT.Feb 15, 1995 · N68ST · Piper PA31310SDR 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.Feb 15, 1995 · N3643D · Piper PA60600ASDR 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.Feb 15, 1995 · N8476T · Cessna 310RSDR 95ZZZX1003Bearing · failedBEARING INNER RACE DOES NOT SEEM TO BE PROPERLY HARDENED. MARKINGS ON BEARING: PEER TRI 13307E JAPAN.Feb 10, 1995SDR 95ZZZX1273Bearing · failedBEARING INNER RACE DOES NOT SEEM TO BE PROPERLY HARDENED. MARKINGS ON BEARINGS: PEER TRI 13307E JAPAN.Feb 9, 1995SDR 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 Jan 24, 1995 · N171GA · Hamflu HFB320SDR 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 ELEMJan 12, 1995 · N72GL · Cessna 310RSDR 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.Jan 12, 1995 · N331DF · Mooney M20KSDR 95ZZZX909Alternator · inoperativeALTERNATOR OFF-LINE IN FLIGHT. PROBLEM TRACED TO BROKEN FIELD WIRE. FUNCTION CHECK OKAY AFTER REPAIRS.Jan 10, 1995 · N231RR · Mooney M20KSDR 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, Jan 2, 1995 · N6975Y · Piper PA23250
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