JASC 6320

Service difficulty reports · 1,931

Reports filed under 6320 · Main Rotor Gearbox, 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 = '6320'
  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 HEEA0012214Upper Housing · wornUPPER HOUSING BUSHING BORE WORN IN AREA 3.Dec 3, 1997 · N911EB · Bolkms BO105SSDR HEEA0012196Lube Pump · fluctuatesAFTER INSTALLATION OF TRANSMISSION AND UPON TESTING OF TRANSMISSION: PUMP FLUCTUATES SEVERELY.Dec 3, 1997 · Skrsky S76ASDR HEEA0012178Top Case · damagedFOUND EXCESSIVE MECHANICAL DAMAGE NEAR THE PYLON MOUNT AREA, WHERE THE SHIMS OF THE SUPPORT BEAMS MADE CONTACT. REPLACED WITH SERVICEABLE PART.Dec 3, 1997 · N407PH · Bell 407SDR 98ZZZX666Hose · leakingOIL HOSE LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Nov 28, 1997 · N901CF · Doug MD900SDR 98ZZZX2529Pump · failedMGB OIL PUMP FAILED BACK LASH. REMOVED AND REPLACED PUMP WITHIN 200 HOURS PER MWC.Nov 25, 1997 · N365WM · Aerosp AS365N2SDR HEEA0012117Transmission · spalledTRANSMISSION BEVEL GEARS HAVE EXCESSIVE SPALLING ON S/N 2195 AND MINOR ON S/N 2310 T.T. 3392:45 (TOOTH FAILURE) PINION S/N 3142, T.T. 353:20 SPALLING ON TOOTH (ROOT AREA) EXCESSIVE DENTS ON BEARINGS 2 EACH 4638303081, T.T. UNKNOWN AND 1 EACH 4638302025, SNov 19, 1997 · N724MB · Bolkms BO105SSDR HEEA0012109Sun Gear · pittedSUN GEAR SPLINES PITTED. REMOVED FROM TRANSMISSION S/N B51797, T.T. 3329:35, TSO 3329:35, TSI 1584:05. REPLACED WITH SERVICEABLE SUN GEAR.Nov 19, 1997 · N42EA · Bell 206L3SDR HEEA0012088Upper Housing · flawedUPPER HOUSING CASTING FLAW.Nov 19, 1997 · Skrsky S76ASDR HEEA0012061Pump · leakingPUMP SEAL LEAKING.Nov 19, 1997 · N54641 · Bell 206L3SDR HEEA0012055Tube · pittedGR BOX TUBE SEAL RIDE PITTED.Nov 19, 1997 · Skrsky S76ASDR 98ZZZX449Bendix Shaft · failedBENDIX SHAFT FAILED IN TRANSMISSION, 4649001006, SN 39. REMOVED AND REPLACED.Nov 18, 1997 · N911SV · Bolkms BO105LSA3SDR 98ZZZX448Clutch Assy · failedCLUTCH ASSY FAILED IN TRANSMISSION 4649001006, SN 39. REMOVED AND REPLACED.Nov 18, 1997 · N911SV · Bolkms BO105LSA3SDR 98ZZZX447Clutch Race · failedCLUTCH OUTER RACE FAILED IN TRANSMISSION 4649001006, SN 39. REMOVED AND REPLACED.Nov 18, 1997 · N911SV · Bolkms BO105LSA3SDR HEEA0011979Seal · leakingSEAL LEAKING.Nov 12, 1997 · N230UN · Bell 230SDR HEEA0011951Case Assy · corrodedXMSN CASE ASSY CORROSION ON TOP FLANGE AND PILOT DIAMETER WORN.Nov 12, 1997 · Bell 412SDR HEEA0011865Shaft · corrodedCORROSION ON OUTBOARD FACE. DENTS ON ROLLER BEARING RACE ON SHAFT.Nov 10, 1997 · Aerosp AS355F1SDR 97ZZZX4859Oil Pump · damagedOIL PUMP SEIZED ON START-UP. NO SHEAR SHAFT WAS INCORPORATED IN OIL PUMP. SEIZURE CAUSED DAMAGE TO PUMP DRIVE RING GEAR TEETH INSIDE TRANSMISSION ASSY AS WELL AS OIL PUMP ASSY. IF SHEAR SHAFT WAS INCORPORATED IN OIL PUMP, ONLY PUMP WOULD HAVE NEEDED CHARGINNov 6, 1997 · N161KA · Kaman K1200SDR 97ZZZX4858Oil Pump · seizedOIL PUMP SEIZED ON START-UP. NO SHEAR SHAFT WAS INCORPORATED IN OIL PUMP. SEIZURE CAUSED DAMAGE TO PUMP DRIVE RING GEAR TEETH INSIDE TRANSMISSION ASSY AS WELL AS OIL PUMP ASSY. IF SHEAR SHAFT WAS INCORPORATED IN OIL PUMP, ONLY PUMP WOULD HAVE NEEDED CHARGINNov 6, 1997 · N161KA · Kaman K1200SDR HEEA0011798Filter Assy · malfunctionedFILTER ASSY BYPASS INDICATOR DOES NOT PROPERLY OPERATE.Nov 5, 1997 · N911NC · Bolkms BK117A3SDR HEEA0011797Gearbox · making metalMAIN GR BOX MAKING METAL.Nov 5, 1997 · N3207T · Aerosp SA315BSDR HEEA0011746Casing · wornMGB CASING BUSHING BORE WORN.Oct 31, 1997 · N60951 · Snias AS350B2SDR HEEA0011735Seal Assy · leakingSEAL ASSY LEAKING.Oct 31, 1997 · N437PH · Bell 407SDR 97ZZZX4822Sungear · wornSPLINES SEVERELY WORN AND 3 CRACKED. SUSPECT CAUSE DUE TO LENGTH OF CALENDAR TIME INSTALLED INDICATING A BREAK DOWN OF THE LUBRICANT. PERIOD OF INSTALLATION WAS 13 YEARS. SUBMITTER RECOMMENDS A CALENDAR LIMITATION OF 4 YEARS AS WELL AS THE EXISTING HOURLY FOct 28, 1997 · N55TV · Bell 206B3SDR 97ZZZX4710Gearshaft · wornTRANSMISSION GEARSHAFT SPLINES SEVERLY WORN. SUSPECT CAUSE DUE TO LENGTH OF CALENDAR TIME INSTALLED INDICATING BREAKDOWN OF THE LUBRICANT. PERIOD OF INSTALLATION WAS 13 YEARS. RECOMMEND A CALENDAR LIMITATION OF 4 YEARS AS WELL AS THE EXISTING HOURLY FREQUENOct 28, 1997 · N55TV · Bell 206B3SDR HAIGJQR0148Thermoswitch · shortedSHORTED - KEEPS LIGHT ON. REPLACED WITH NEW PART FROM CSF.Oct 24, 1997 · N97PM · Bell 206LSDR HAIGJQR0147Seal · leakingSEAL LEAKING AN UNACCEPTABLE AMOUNT OF OIL. REPLACED WITH NEW SEAL FROM BHT.Oct 24, 1997 · N98W · Bell 212SDR HEEA0011636Stop · deterioratedRUBBER STOP DETERIORATED.Oct 22, 1997 · N6160Z · Bell 206L3SDR HEEA0011622Transmission · making metalM/R TRANSMISSION MAKING METAL.Oct 21, 1997 · N230UN · Bell 230SDR HEEA0011570Transmission · making metalMETAL IN OIL (LOWER CHIP PLUGS). NOTE: TOP CASE P/N 406-040-052-107, S/N A788, REMOVED WITH TRANSMISSION, T.T. 1054:35 HOURS.Oct 20, 1997 · N437PH · Bell 407SDR HEEA0011499Expansion Pin · wornEXPANSION PIN WEAR ON BUSHINGS.Oct 14, 1997 · N6097Z · Snias AS350B2SDR CA971121004Sleeve · cracked(CAN) FRENCH AD T97-303-066, REQUIRED INSPECTION OF THE SLEEVE, SPLINED SHAFT. INSPECTION INCLUDED A DYE PENETRANT OF SHAFT WHICH DETECTED TWO SMALL WEAR MARKS ON THE FRONT OF THE SHAFT ABOUT 120 DEGREES APART. FURTHER INVESTIGATION FOUND THAT THESE WEAR MAROct 14, 1997 · Snias AS332LSDR HEEA0011414Transmitter · failedFALSE INDICATION.Oct 9, 1997 · N141MA · Bell 407SDR HEEA0011345Oil Temp · fluctuatesGR BOX OIL TEMP FLUCTUATES 70 DEGREES C AT MID RANGE.Oct 9, 1997 · N8045T · Bell 214STSDR HEEA0011272Indicator · sticksPRESSURE NEEDLE STICKS BETWEEN 40 AND 50 PSI.Oct 8, 1997 · N293CA · Bell 412SDR HEEA0011265Gear · mis mfgGEAR MISMANUFACTURED.Oct 8, 1997 · Skrsky S76ASDR CA971020017Transmission · failed(CAN) METAL PARTICLES ON MAGNETIC CHIP PLUG OF SIZE AND QUANTITY DEEMED UNACCEPTABLE BY THE MANUFACTURER.Oct 8, 1997 · Bolkms BO105CSDR HEEA0011220Transmission · pitted bearingFOUND EXCESSIVE PITTING ON BEARINGS: 2 EA. SB3318-101/201, 2 EA. SB3264-102/202, 2 EA. SB2167-101, 2 EA. SB2151-107, 2 EA. SB3354-102/202, 2 EA. SB3317-101/201, 2 EA. SB3304-102/202, 2 EA. SB3316-101/201, 2 EA. SB2054-101, 1 EA. SB3408-101/201, 1EA. SB3407-10Oct 7, 1997 · N4253S · Skrsky S76ASDR HEEA0011219Input Housing · crackedINPUT HOUSING CRACKED. REPLACED WITH NEW INPUT HOUSING.Oct 7, 1997 · N31219 · Skrsky S76ASDR HEEA0011218Input Housing · crackedGR BOX HOUSING CRACKED. REPLACED WITH NEW INPUT HOUSING.Oct 7, 1997 · N5435V · Skrsky S76ASDR HEEA0011217Input Housing · crackedGR BOX INPUT HOUSING CRACKED. REPLACED WITH NEW INPUT HOUSING.Oct 7, 1997 · N4253S · Skrsky S76ASDR HEEA0011195Shaft · wornSHAFT SPLINES WORN MIC. READING .518. REPLACED WITH SERVICEABLE SHAFT.Oct 2, 1997 · N62127 · Bell 206L4SDR HEEA0011143Indicator · failedOIL LEAKING INTERNALLY - TEMP. NEEDLE STICKS.Oct 2, 1997 · N8588X · Bell 206L3SDR 97ZZZX4492Transmission · making metalTRANSMISSION GENERATING CHIP LIGHTS SINCE NEW ON AVERAGE OF 7-10 HOURS OF OPERATION. MFG SUGGESTED LESS SENSITIVE CHIP PLUG. XMSN CONTINUED TO GENERATE METAL. ACFT REMOVED FROM SERVICE WHEN PIECES REACHED .25 INCH IN LENGTH. MFG HAS NO PUBLISHED CRITERIA FOct 2, 1997 · N8626S · Enstrm F28FSDR HEEA0011111Indicator · failedGR BOX OIL PRESS SIDE DOESN'T INDICATE.Sep 30, 1997 · Bell 412SDR HQEA0000013Transducer · pins failedTHE TRANSMISSION OIL PRESSURE WAS ERRATIC. TWO OF THE THREE PINS FOR CONNECTOR FELL OUT OF THE TRANSDUCER. INSTALLED NEW TRANSDUCER. (X)Sep 17, 1997 · N4NH · Agusta A109A2SDR CA971007002Case · leaking(CAN) TRANSMISSION STARTED LEAKING OIL. CRACK FOUND IN LOWER CASE. OIL COMING FROM MIXBOX.Sep 15, 1997 · Boeing 1072SDR HEEA0011032Center Case · corrodedCORRODED IN BOLT HOLES BEYOND LIMITS. REMOVED FROM A/C SERIAL NUMBER 52119.Sep 10, 1997 · Bell 206L4SDR CA970916017Screw · wrong part(CAN) DURING DISASSEMBLY OF DRIVE SHAFT, 3 OF 12 SCREWS FOUND WERE THE WRONG TYPE. THERE WAS NO SPLIT PIN HOLE, AND THEY HAD BEEN INSTALLED WITH A HEXAGONAL, INTERNAL LOCK NUT. THE ENDS HAD BEEN CENTER PUNCHED TO PEEN ENDS OVER. SCREWS SHOULD BE CASTELATEDSep 3, 1997 · Snias AS350DSDR 97ZZZX5059Switch · failedTRANSMISSION OIL PRESSURE LIGHT ILLUMINATES DURING FLIGHT. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Aug 27, 1997 · N202LF · Bolkms BO105LSA3SDR 97ZZZX4412Bore Liner · displacedMAIN TRANSMISSION OIL PRESSURE DROPPED TO 30.35 PSI AND REMAINED STEADY. FOUND RT BEVEL GEAR OIL JET BORE LINER BACKED OUT CAUSING OIL LEAKAGE ON TRANSMISSION. REPAIRED RT BEVEL GEAR OIL JET BORE LINER IAW S76 OVERHAUL AND REPAIR INSTRUCTIONS 76350-065 SECTIAug 26, 1997 · N703AL · Skrsky S76
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