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 HAIHEEA9877Transmission · wornWEAR IN SURFACE OF TRANSMISSION TOP CASE.May 16, 1997 · N5748M · Bell 214STSDR HAIHEEA9863Pump · shaft wornSHAFT WORN IN SEAL RIDE.May 13, 1997 · N2764F · Bell 206L1SDR HAIHEEA9849Filter · malfunctionCONSTANT REPEATED BYPASS INDICATION ON TRANSMISSION FILTERS. HAVE CHANGED OIL TWICE, FILTERS TWICE, BYPASS INDICATORS TWICE. STILL INDICATOR POPS. OIL IS ALWAYS CLEAN, FILTERS WERE CLEANED AND TRANSMISSION NEVER HAD ANY HISTORY OF CHIP LIGHTS.May 13, 1997 · N9214U · Doug MD900SDR HAIHEEA9798Housing · corrodedAREA "A" HAS CORROSION PITTING AROUND THE BOLT HOLES THE DEEPEST BEING APPROXIMATELY 1.00 MM. FLANGE THICKNESS AROUND BOLT HOLES IS ABOUT 9.98 MM. AREA "B" HAS APPROX. .50MM OF CORROSION IN DEPTH AND ABOUT 10MM IN WIDTH ANDAPPROX. 140 MM IN LENGTH. THE THICKMay 7, 1997 · Aerosp AS355F1SDR HAIHEEA9739Upper Housing · corrosionCORROSION IN MOUNTING HOLES BEYOND BUSHING.Apr 30, 1997 · N3520T · Bolkms BO105SSDR HAIHEEA9702Gear Assy · wornGEAR ASSY SEAL RIDE AREA WORN.Apr 30, 1997 · N3893P · Bell 412SDR HAIHEEA9692Seal Assy · pittedSEALING SURFACE PITTING BEYOND LIMITS.Apr 30, 1997 · N5742N · Bell 206L1SDR HAIHEEA9687Case Assy · wornMAIN T/P BORE SLEEVE WORN, OIL LINE INLET ID CORRODED.Apr 30, 1997 · N5014V · Bell 206L1SDR HAIHEEA9671Transmitter · out of tolTRANSMISSION OIL PRESSURE TRANSMITTER TRANSMITTS OUT OF TOLERANCE.Apr 29, 1997 · N1546K · Skrsky S76ASDR HAIHEEA9630Gear · defectiveGEAR HAS MISSING RIVETS.Apr 29, 1997 · Skrsky S76ASDR CA970609006Gearbox · making metal(CAN) METAL FOUND ON CHIP DETECTORS, MAINLY LOWER ONE, AND IN ENGINE AND NICAD FILTER. OIL AND FILTERS REPLACED. SYSTEM FLUSHED. MORE CHIPS ONE HOUR LATER. GEARBOX REPLACED.Apr 26, 1997 · Bell 206BSDR AU970884Transmission · making metal(AUS) MAIN ROTOR TRANSMISSION METAL CONTAMINATION. SUSPECT CAUSED BY FATIGUE SPALLING OF PINION AND RING GEARS.Apr 20, 1997 · Robsin R22BETASDR HAIHEEA9411Case Assy · defectiveUNABLE TO OBTAIN ACCEPTABLE BACKLASH. SHIM DIMENSIONS CHECK OK USING FORMULA FROM CR&O MANUAL, HOWEVER, BACKLASH STILL BELOW MINIMUM.Apr 16, 1997 · N754H · Bell 212SDR HAIHEEA9407Seal Assy · corrodedCARBON SEAL PITTED AND CORRODED; SEAL LEAKS. SENT TO MAGNETIC SEAL CORP. FOR INSPECTION AND REPAIR.Apr 16, 1997 · N10814 · Bell 206L1SDR HAIHEEA9376Bearing · failedBEARING CAGE DRAGGING ON INNER RACE. REMOVED FROM YV-0-CVG-11. REPLACED WITH SERVICEABLE BEARING.Apr 16, 1997 · Bell 412SDR CA970528015Mag Seal · leaking(CAN) MAGNETIC SEAL SQUEELING ON SHUT DOWN SINCE INSTALLATION. OIL DARK AND BLACK, NON-MAGNETIC FILM IN FILTER.Apr 16, 1997 · Bell 206BSDR 97ZZZX3211Switch · failedTEMPERATURE SWITCH MALFUNCTIONED FOR NO OBVIOUS REASON. CAUSED INTERMITTENT OVERTEMP LIGHT OF M/R GEARBOX.Apr 10, 1997 · N244BF · Robsin R44SDR 97ZZZX2758Bearing · failedFIELD CHIP LIGHT. FOUND BEARING BALLS, INNER AND OUTER RACE, PITTED (BREAKING DOWN).Apr 2, 1997 · N350AL · Bell 206L3SDR HAIW6HR0079Case Assy · defectivePART IS DEFECTIVE. FOUND BOTH SMALLER BORE OIL PASSAGES WHICH SUPPLY OIL TO THE #3 JETS (3EA.) & MAST BEARING TO BE CLOGGED (BETWEEN THE VERTICAL PASSAGE & THE JET BORE) WITH A HARDENED EPOXY - LIKE SUBSTANCE. UPON REMOVAL OF THE EPOXY - LIKEMATERIAL, FOUND BOMar 28, 1997 · Bell 222SDR HAIW6HR0078Case Assy · defectivePART IS DEFECTIVE. FOUND BOTH SMALLER BORE OIL PASSAGES WHICH SUPPLY OIL TO THE #3 JETS (3EA.) & MAST BEARING TO BE CLOGGED (BETWEEN THE VERTICAL PASSAGE & THE JET BORE) WITH A HARDENED EPOXY - LIKE SUBSTANCE. UPON REMOVAL OF THE EPOXY - LIKEMATERIAL, FOUND Mar 28, 1997 · Bell 222SDR CA970609014Bearing · failed(CAN) SEVERAL SMALL SLIVERS AND FLAKES OF METAL FOUND IN MAIN GEARBOX OIL FILTER. OIL ANALYSIS INDICATE BEARING MATERIAL FAILURE. GEARBOX REPLACED.Mar 28, 1997 · Bolkms BO105SSDR 97ZZZX1692Gearbox · sludgedWHILE PERFORMING A 100-HR INSPECTION, MAIN GEARBOX CHIP DETECTOR WAS REMOVED. CHIP DETECTOR FOUND WITH EXCESSIVE AMOUNTS OF SLUDGE BUILD-UP. A FUNCTIONAL CHECK VERIFIED A CHIP WOULD NOT COMPLETE THE CIRCUIT. AFTER CLEANING CHIP DETECTOR, NO FURTHER DISCREPAMar 27, 1997 · N222YP · Robsin R22BETASDR 97ZZZX1691Transmission · pin missingOPERATOR PURCHASED AN 'EXCHANGE' MAIN ROTOR TRANSMISSION FROM AMERICAN EUROCOPTER. UNIT RECEIVED WITH HISTORICAL RECORD CARDS, A 'SERVICABLE' TAG, AND A FAA FORM ONE CERTIFICATE. TRANSMISISON WAS OVERHAULED 2-4-97, FAA REPAIR STATION ZF6Y043N. AFTER INSTALLMar 27, 1997 · N70EG · Bolkms BO105SSDR HAIHEEA9239Pump · leakingXMSN OIL PUMP LEAKING.Mar 21, 1997 · N407PH · Bell 407SDR 97ZZZX1670Screen · unbondedTRANSMISSION SUMP INBOARD SLEEVE UNBONDED FROM SCREEN ASSY, 2 EACH REPLACED IN LAST 4 MONTHS FOR SAME REASON.Mar 21, 1997 · N67960 · Bell 206BSDR NYBA9712Ring Gear · making metalGEARBOX RING GEAR CAUSING METAL GENERATION. REPLACEDMar 18, 1997 · N129NH · Skrsky S58ETSDR JYDR970328Main Shaft · crackedCRACKS FOUND IN LOWER SPLINES. CRACKS APPEAR TO START IN SPLINE RADIUS AND TRAVEL AT 45 DEGREES TOWARD THE SPLINE TOOTH. INDICATIONS ARE ON THE LOAD SIDE JUST AT OR BELOW ENGAGEMENT AREA. ELEVEN SPLINES WITH INDICATIONS. LONGEST INDICATION IS 0.150 INCH LOMar 17, 1997 · N163AC · Skrsky S64FSDR CA970327016Input Seal · leaking(CAN) INPUT SEAL LEAKING, HYDRAULIC BELT CHANGED, OIL SOAKED.Mar 17, 1997 · Snias AS350BSDR 97ZZZX2478Main Shaft · crackedMGB MAIN SHAFT INSPECTION, CRACKS FOUND IN LOWER SPLINES. CRACKS APPEAR TO START IN SPLINE RADIUS AND TRAVEL AT 45 DEGREES TOWARD THE SPLINE TOOTH. INDICATIONS ARE ON THE LOAD SIDE JUST AT OR BELOW ENGAGEMENT AREA. ELEVEN SPLINES WITH INDICATIONS. LONGEST Mar 17, 1997 · N163AC · Skrsky S64FSDR 97ZZZX2457Pinion Assy · leakingTRANSMISSION ASSY INPUT PINION ASSY LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. CORES RETURNED TO MDHS FROM RNO.Mar 15, 1997 · N901CF · Doug MD900SDR 97ZZZX2456Pinion Assy · leakingTRANSMISSION ASSY INPUT PINION ASSY LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. CORES RETURNED TO MDHS FROM RNO.Mar 15, 1997 · N901CF · Doug MD900SDR GJOR323EGearbox · making metalAFTER A TRAINING FLIGHT, PILOT NOTIFIED MAINT OF A STRANGE NOISE THAT APPEARED TO BE EMANATING FROM THE DRIVE SYSTEM. AFTER A VISUAL OF THE MAIN AND TAIL ROTOR DRIVE SYSTEMS, A MAINT GROUND RUN WAS PERFORMED. MAINT CONFIRMED A MEDIUM TO LOW FREQUENCY NOISE RMar 14, 1997 · N4046A · Robsin R22BETASDR 97ZZZX1939Bearing · spalledSPALLING ON BALLS AND OUTER RACE OF BEARING. THIS BEARING IS USED IN SEVERAL DIFFERENT APPLICATIONS IN THE DRIVE TRAIN OF BELL HELICOPTERS.Mar 13, 1997 · N600MA · Bell UH1BSDR HEEA979183Bearing · spalledBEARING EXCESSIVE SPALLING. REPLACED WITH NEW BEARING.Mar 12, 1997 · N724MB · Bolkms BO105SSDR 97ZZZX2477Main Shaft · crackedMGB MAIN SHAFT INSPECTION. TWO SPLINES FOUND CONTAINING ONE INDICATION EACH. INDICATIONS LOCATED ON THE LOAD SIDE OF THE SPLINE AND IN THE ROOT AREA. LENGTH OF INDICATIONS WERE APPROXIMATELY 0.100 INCH LONG. INDICATION DID NOT EXTEND ONTO THE TOOTH FACE OFMar 4, 1997 · N159AC · Skrsky S64FSDR HEEA979135Gear Assy · mismanufacturedGEAR ASSY IMPROPERLY MACHINED, UNABLE TO INSTALL LOCKING CLIP P/N 204-040-231-001.Feb 21, 1997 · Bell 412SDR HEEA979130Transmitter · failedOIL PRESSURE READS LOW ABOVE 94% N1 AND PRESSURE FLUCTUATES FROM 110% TO 115%.Feb 21, 1997 · N417PH · Bell 407SDR HEEA979126Case Assy · defectiveSERIAL NUMBER ON ACCESSORY HOUSING DOES NOT MATCH MAIN CASE SERIAL NUMBER. MAIN CASE S/N A-000180 AND ACCESSORY HOUSING S/N A-100.Feb 21, 1997 · N3116P · Bell 206L3SDR 97ZZZX1138Seal Assy · failedDURING PRE-FLIGHT INSPECTION, MAIN DRIVESHAFT GREASE WAS FOUND ON FORWARD FIREWALL. AFTER FURTHER INVESTIGATION WHEN THE DRIVESHAFT WAS REMOVED, THE AFT SEAL ASSEMBLY HAD BECOME DEBONDED FROM THE ALUMINUM CUP. THE ROTOR BRAKE HAD ALSO STAYED ENGAGED WITH A VFeb 20, 1997 · N531KH · Bell 206L1SDR CA970311040Tube Assembly · chafed(CAN) AFT SECTION OF TUBE CHAFED AGAINST AIRFRAME BULKHEAD, CAUSING HOLE IN TUBE AND LOSS OF TRANSMISSION OIL. CLAMPS NOT INSTALLED.Feb 18, 1997 · Bell 212SDR 97ZZZX2458Pinion Assy · leakingTRANSMISSION ASSY LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. CORES RETURNED TO MDHS FROM RNO.Feb 14, 1997 · N901CF · Doug MD900SDR HEEA979108Gearbox · making metalCOMBINING GEARBOX MAKING METAL.Feb 11, 1997 · N3897N · Bell 214STSDR HEEA979081Tube · pittedREPAIRED PART RECEIVED FROM H-S TOOL & PARTS, INC. DEFECTIVE (PITTING ON JOURNAL). SENT TO H-S TOOL & PARTS, INC. FOR INSPECTION AND REPAIR.Feb 11, 1997 · Skrsky S76ASDR HEEA979079Drag Pin Assy · bearing failedBEARING CAME OUT OF FITTING. REPLACED FITTING WITH SERVICEABLE FITTING.Feb 11, 1997 · N2272V · Bell 206B3SDR HEEA979071Bearing · failedBEARING CAGE BROKEN. REPLACED WITH NEW BEARING.Feb 11, 1997 · N4253S · Skrsky S76ASDR HEEA979020Bearing Bushing · looseTRANSMISSION REMOVED DUE TO METAL IN OIL. BEARING SPINNING IN BUSHING WAS CAUSE OF PROBLEM. REPLACED WITH SERVICEABLE BEARING BUSHING.Feb 10, 1997 · N3526T · Bolkms BO105SSDR HEEA978999Oil Pump · scarredOIL PUMP SCARRED INTERNAL BUSHING.Feb 10, 1997 · N54191 · Bolkms BO105SSDR 97ZZZX860Main Shaft · crackedDURING OVERHAUL OF THE MGB, THE MAIN SHAFT WAS SUBJECTED TO A FMPI. ONE SPLINE WAS FOUND CRACKED ACROSS THE SPLINE WIDTH ON THE UPPER END OF THE LOWER SPLINE. THE CRACK DID NOT APPEAR TO ORIGINATE WHERE THE LOWER PLANETARY SPLINE CONTACTS THE SHAFT, BUT WAS LFeb 9, 1997 · N158AC · Skrsky S64FSDR 97ZZZX2476Main Shaft · crackedDURING O/H OF MGB, THE MAIN SHAFT WAS SUBJECTED TO A FMPI. ONE SPLINE FOUND CRACKED ACROSS THE SPLINE WIDTH ON UPPER END OF LOWER SPLINE. THE CRACK DID NOT APPEAR TO ORIGINATE WHERE THE LOWER PLANETARY SPLINE CONTACTS THE SHAFT, BUT WAS LOCATED APPROX 0.100 Feb 9, 1997 · N158AC · Skrsky S64FSDR 97ZZZX2459Pinion Assy · leakingTRANSMISSION ASSY LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. CORES RETURNED TO MDHS FROM RNO.Feb 8, 1997 · N901CF · Doug MD900
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