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.
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
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 HAIHEEA9877Transmission · wornWEAR IN SURFACE OF TRANSMISSION TOP CASE.SDR HAIHEEA9863Pump · shaft wornSHAFT WORN IN SEAL RIDE.SDR 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.SDR 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 THICKSDR HAIHEEA9739Upper Housing · corrosionCORROSION IN MOUNTING HOLES BEYOND BUSHING.SDR HAIHEEA9702Gear Assy · wornGEAR ASSY SEAL RIDE AREA WORN.SDR HAIHEEA9692Seal Assy · pittedSEALING SURFACE PITTING BEYOND LIMITS.SDR HAIHEEA9687Case Assy · wornMAIN T/P BORE SLEEVE WORN, OIL LINE INLET ID CORRODED.SDR HAIHEEA9671Transmitter · out of tolTRANSMISSION OIL PRESSURE TRANSMITTER TRANSMITTS OUT OF TOLERANCE.SDR HAIHEEA9630Gear · defectiveGEAR HAS MISSING RIVETS.SDR 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.SDR AU970884Transmission · making metal(AUS) MAIN ROTOR TRANSMISSION METAL CONTAMINATION. SUSPECT CAUSED BY FATIGUE SPALLING OF PINION AND RING GEARS.SDR HAIHEEA9411Case Assy · defectiveUNABLE TO OBTAIN ACCEPTABLE BACKLASH. SHIM DIMENSIONS CHECK OK USING FORMULA FROM CR&O MANUAL, HOWEVER, BACKLASH STILL BELOW MINIMUM.SDR HAIHEEA9407Seal Assy · corrodedCARBON SEAL PITTED AND CORRODED; SEAL LEAKS. SENT TO MAGNETIC SEAL CORP. FOR INSPECTION AND REPAIR.SDR HAIHEEA9376Bearing · failedBEARING CAGE DRAGGING ON INNER RACE. REMOVED FROM YV-0-CVG-11. REPLACED WITH SERVICEABLE BEARING.SDR CA970528015Mag Seal · leaking(CAN) MAGNETIC SEAL SQUEELING ON SHUT DOWN SINCE INSTALLATION. OIL DARK AND BLACK, NON-MAGNETIC FILM IN FILTER.SDR 97ZZZX3211Switch · failedTEMPERATURE SWITCH MALFUNCTIONED FOR NO OBVIOUS REASON. CAUSED INTERMITTENT OVERTEMP LIGHT OF M/R GEARBOX.SDR 97ZZZX2758Bearing · failedFIELD CHIP LIGHT. FOUND BEARING BALLS, INNER AND OUTER RACE, PITTED (BREAKING DOWN).SDR 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 BOSDR 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 SDR CA970609014Bearing · failed(CAN) SEVERAL SMALL SLIVERS AND FLAKES OF METAL FOUND IN MAIN GEARBOX OIL FILTER. OIL ANALYSIS INDICATE BEARING MATERIAL FAILURE. GEARBOX REPLACED.SDR 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 DISCREPASDR 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 INSTALLSDR HAIHEEA9239Pump · leakingXMSN OIL PUMP LEAKING.SDR 97ZZZX1670Screen · unbondedTRANSMISSION SUMP INBOARD SLEEVE UNBONDED FROM SCREEN ASSY, 2 EACH REPLACED IN LAST 4 MONTHS FOR SAME REASON.SDR NYBA9712Ring Gear · making metalGEARBOX RING GEAR CAUSING METAL GENERATION. REPLACEDSDR 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 LOSDR CA970327016Input Seal · leaking(CAN) INPUT SEAL LEAKING, HYDRAULIC BELT CHANGED, OIL SOAKED.SDR 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 SDR 97ZZZX2457Pinion Assy · leakingTRANSMISSION ASSY INPUT PINION ASSY LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. CORES RETURNED TO MDHS FROM RNO.SDR 97ZZZX2456Pinion Assy · leakingTRANSMISSION ASSY INPUT PINION ASSY LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. CORES RETURNED TO MDHS FROM RNO.SDR 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 RSDR 97ZZZX1939Bearing · spalledSPALLING ON BALLS AND OUTER RACE OF BEARING. THIS BEARING IS USED IN SEVERAL DIFFERENT APPLICATIONS IN THE DRIVE TRAIN OF BELL HELICOPTERS.SDR HEEA979183Bearing · spalledBEARING EXCESSIVE SPALLING. REPLACED WITH NEW BEARING.SDR 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 OFSDR HEEA979135Gear Assy · mismanufacturedGEAR ASSY IMPROPERLY MACHINED, UNABLE TO INSTALL LOCKING CLIP P/N 204-040-231-001.SDR HEEA979130Transmitter · failedOIL PRESSURE READS LOW ABOVE 94% N1 AND PRESSURE FLUCTUATES FROM 110% TO 115%.SDR 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.SDR 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 VSDR CA970311040Tube Assembly · chafed(CAN) AFT SECTION OF TUBE CHAFED AGAINST AIRFRAME BULKHEAD, CAUSING HOLE IN TUBE AND LOSS OF TRANSMISSION OIL. CLAMPS NOT INSTALLED.SDR 97ZZZX2458Pinion Assy · leakingTRANSMISSION ASSY LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. CORES RETURNED TO MDHS FROM RNO.SDR HEEA979108Gearbox · making metalCOMBINING GEARBOX MAKING METAL.SDR 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.SDR HEEA979079Drag Pin Assy · bearing failedBEARING CAME OUT OF FITTING. REPLACED FITTING WITH SERVICEABLE FITTING.SDR HEEA979071Bearing · failedBEARING CAGE BROKEN. REPLACED WITH NEW BEARING.SDR HEEA979020Bearing Bushing · looseTRANSMISSION REMOVED DUE TO METAL IN OIL. BEARING SPINNING IN BUSHING WAS CAUSE OF PROBLEM. REPLACED WITH SERVICEABLE BEARING BUSHING.SDR HEEA978999Oil Pump · scarredOIL PUMP SCARRED INTERNAL BUSHING.SDR 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 LSDR 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 SDR 97ZZZX2459Pinion Assy · leakingTRANSMISSION ASSY LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. CORES RETURNED TO MDHS FROM RNO.
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