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 CA970421042Crossbeam · cracked(CAN) INSPECTION PER AD 96-156-071(B) REVEALED CRACK OF BI-DIRECTIONAL CROSSBEAM OF MAIN GEARBOX. PART TC: 5,392.Feb 7, 1997 · Snias AS350BSDR CA970311091Crossbeam · cracked(CAN) MAIN GEARBOX BI-DIRECTIONAL CROSSBEAM FOUND CRACKED DURING INSPECTION PER AD 96-156-07(B).Feb 7, 1997 · Snias AS350BSDR 97ZZZX2575Shaft · crackedMAIN GEARBOX INSPECTION. TWO INDICATIONS FOUND IN THE RADIUS OF ONE SPLINE DURING MPI INSPECTION. BOTH INDICATIONS WERE APPROXIMATELY 0.050 INCH IN LENGTH AND EXTENDING TOWARDS THE TOOTH FACE. NO OTHER INDICATIONS WERE FOUND.Feb 7, 1997 · N179AC · Skrsky S64FSDR 97ZZZX1271Inner Race · making metalMETAL CHIPPING AWAY FROM THE INNER RACE OF ONE BEARING SET FROM PLANETARY GEAR SET OF THE MAIN ROTOR TRANSMISSION. DETECTED BY THE CHIP DETECTOR.Feb 6, 1997 · N3186P · Bell 206L1SDR 97ZZZX953Gasket · misfitTHESE PARTS WHEN RECEIVED FROM A.E.C., ARE TOO SMALL IN DIAMETER TO CORRECTLY FIT. AMER EUROCOPTER SAYS TO SOAK THE GASKET OR TO TEAR THE OUTSIDE PART OF THE BOLT HOLES TO MAKE IT FIT. AFTER TRYING TO GET THE GASKET TO SWELL BY SOAKING, THE GASKET STILL TOREFeb 4, 1997 · N6084W · Snias AS350B2SDR 97ZZZX913Housing · crackedWHILE DOING THE ZONE 5 INSPECTION, FOUND A CRACK IN THE UPPER MAIN GEARBOX HOUSING JUST AFT OF THE RIGHT REAR SUPPORT LEG. THE CRACK WAS FOUND IN THE AREA SHOWN IN CHAPTER 5-20-00, PAGE 23, FIGURE 16. THE MAIN GEARBOX WILL BE CHANGED TO FIX THIS PROBLEM. AIFeb 4, 1997 · N76FL · Skrsky S76BSDR 97ZZZX912Gear Tooth · chippedDURING AIRCRAFT RUN-UP, ROTOR TACHOMETER WENT TO ZERO. FOUND ONE TOOTH ON RING GEAR CHIPPED. FOUND CHIP JAMMED IN OIL PUMP GEARS WHICH CAUSED OIL PUMP DRIVESHAFT TO SHEAR. SCHWEIZER SB 244.2 ADDRESSES THIS SUBJECT. THIS IS ALSO ADDRESSED IN THE 50/100 HR CFeb 4, 1997 · N6141N · Hughes 269CSDR 97ZZZX2479Main Shaft · crackedMGB MAIN SHAFT INSPECTION, EIGHT SPLINES FOUND DURING MPI INSPECTION WITH ONE TO THREE INDICATIONS PER SPLINE. INDICATIONS WERE FOUND IN RADIUS AND TRAVELED UP THE TOOTH FACE APPROXIMATELY .1250 INCH.Feb 1, 1997 · N178AC · Skrsky S64FSDR 97ZZZX914Pinion · teeth brokenINSPECTION FOUND PINION WITH A BROKEN TOOTH AND PITTING ON THE REST OF THE TEETH. SUBMITTER BELIEVES THE CAUSE TO BE IMPROPER BACKLASH.Jan 29, 1997 · Bell OH58ASDR 97ZZZX1117Ring Gear · spalledOPENED TRANSMISSION TO INSPECT FOR WEAR AND FOUND M/R OUTPUT SHAFT RING GEAR 369D25127-11, S/N 005570-1089, AND PINION 369D25125-13, S/N 005570-0437, SPALLED IN SEVERAL PLACES. REPLACED TRANSMISSION. SENT THIS ONE IN FOR OVERHAUL.Jan 22, 1997 · N5074R · Hughes 369DSDR 97ZZZX1273Bearing · failedTRANSMISSION MADE CHIP LIGHTS, FOUND BEARING BALLS BREAKING DOWN.Jan 21, 1997 · N351AL · Bell 206L3SDR 98ZZZX1016Oil Pump · failedHAD TO REMOVE TRANSMISSION FOR DAMAGED OIL PUMP DRIVE GEAR CAUSED FROM OIL PUMP SEIZURE (NO SHEAR SHAFT ON OIL PUMP). DATE OF INCIDENT 1-20-97.Jan 20, 1997 · N134KA · Kaman K1200SDR 97ZZZX669Hose · leakingHOSE LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Dec 24, 1996 · N901CF · Doug MD900SDR 97ZZZX407Sun Gear · defectiveRECEIVED 2 EACH NEW SUN GEARS S/N'S 1389 AND 1368. PERFORMED MAGNAFLUX INSPECTION ON GEARS DUE TO COMPANY POLICY. BOTH FOUND TO HAVE DEFECT INDICATIONS. VISUAL INSPECTION REVEALED NOTHING. RETURNED TO MANUFACTURER FOR EVALUATION.Dec 23, 1996 · Bolkms BO105SSDR 97ZZZX205Housing · crackedWHILE PERFORMING 150 HR INSPECTION A CRACK WAS FOUND ON THE UPPER HOUSING AFT RIGHT FOOT OF THE MAIN GEARBOX. (UPPER HOUSING TT 2336.7). REPLACED MAIN GEARBOX ASSEMBLY WITH A SERVICEABLE GEARBOX IAW SIKORSKY MM. A/C TT 3091.8 HRS. GRBOX P/N 76351-09600-042Dec 13, 1996 · N76RP · Skrsky S76BSDR 97ZZZX199Hose · leakingTRANSMISSION TO FREEWHEELING UNIT HOSE WAS SEEPING AT MIDDLE OF LINE DUE TO DEFECT. HOSE WAS REPLACED WITH SERVICEABLE HOSE.Dec 12, 1996 · N5748H · Bell 206L1SDR HEEA968654Center Case · bore wornCENTER CASE OUTPUT BORE WORN, CORROSION ON BASE FLANGE AND WEAR STEP ON SUPPORT PINS AND NOZZLE RING SURFACE.Dec 10, 1996 · N54191 · Bolkms BO105SSDR 97ZZZX204Nozzle · bentDURING OVERHAUL OIL NOZZLE WAS FOUND BENT - PART WAS REPLACED.Dec 9, 1996 · N5074R · Hughes 369DSDR HEEA968611Sleeve Assy · damagedDAMAGED THREADS IN JACK OUT HOLE.Dec 4, 1996 · N911PB · Bell 412SDR HEEA968610Gear · pittedPITTING ON MATING SURFACE BEYOND ACCEPTABLE LIMITS.Dec 4, 1996 · N911PB · Bell 412SDR HEEA968566Shaft · corrodedTRANSMISSION OVERHAUL DUE. UPON INSPECTION OF PARTS NOTED:CORRODED SPLINES BEYOND LIMITS. REPLACED WITH SERVICEABLE PARTS. SEE MMIR# HEEA0008563 THROUGH HEEA0008566 FOR PARTS REPLACED.Nov 25, 1996 · N10761 · Bell 206L1SDR HEEA968565Housing · corrodedTRANSMISSION OVERHAUL DUE. UPON INSPECTION OF PARTS NOTED: CORROSION IN BOLT HOLE. REPLACED WITH SERVICEABLE PARTS. SEE MMIR# HEEA0008563 THROUGH HEEA0008566 FOR PARTS REPLACED.Nov 25, 1996 · N10761 · Bell 206L1SDR HEEA968564Case Assy · corrodedTRANSMISSION OVERHAUL DUE. UPON INSPECTION OF PARTS NOTED: CORROSION IN ORING GROOVE. REPLACED WITH SERVICEABLE PARTS. SEE MMIR# HEEA0008563 THROUGH HEEA0008566 FOR PARTS REPLACED.Nov 25, 1996 · N10761 · Bell 206L1SDR HEEA968563Case Assy · corrodedTRANSMISSION OVERHAUL DUE. UPON INSPECTION OF PARTS NOTED: CORROSION ON I/P FLANGE SURFACE AND SURFACE WHERE CENTER CASE SEATS. REPLACED WITH SERVICEABLE PARTS. SEE MMIR# HEEA0008563 THROUGH HEEA0008566 FOR PARTS REPLACED.Nov 25, 1996 · N10761 · Bell 206L1SDR 97ZZZX668Hose · leakingHOSE LEAKING BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Nov 25, 1996 · N901CF · Doug MD900SDR 97ZZZX640Hose · leakingHOSE LEAKING BEYOND SERVICEABLE LIMITS. SMALL PINHOLE 3 INCHES FROM OIL PUMP OUTLET. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Nov 25, 1996 · N901CF · Doug MD900SDR HEEA968521Case Assy · faultyS/N ON MAIN CASE DOES NOT MATCH WITH S/N ON ACC. DRIVE HOUSING. MAIN CASE S/N A000180 AND ACC. DRIVE HOUSING S/N A100.Nov 21, 1996 · N3116P · Bell 206L3SDR HEEA968490Pinion · excess wearEXCESSIVE WEAR ON CONVEX SIDE OF GEAR TEETH. REPLACED WITH SERVICEABLE PART. SEE MMIR# HEEA0008489 FOR PINION ALSO REPLACED.Nov 20, 1996 · N31219 · Skrsky S76ASDR HEEA968489Bevel Gear · excess wornEXCESSIVE WEAR ON CONVEX SIDE OF GEAR TEETH. REPLACED WITH SERVICEABLE PART. SEE MMIR# HEEA0008490 FOR PINION ALSO REPLACED.Nov 20, 1996 · N31219 · Skrsky S76ASDR CA961216004Driveshaft · teeth missing(CAN) MAIN DRIVESHAFT INSPECTED DURING 300 HOUR INSPECTION. 7 OUT OF 34 TEETH ON OUTPUT SPLINE TO MAIN TRANSMISSION FOUND CRACKED.Nov 20, 1996 · Hughes 369FFSDR CA970326005Bearing · peeling(CAN) LEFT HAND INPUT BEARING,ON MAIN TRANSMISSION, PEELING.Nov 12, 1996SDR HEEA968421Filter Housing · pin holePIN HOLE ON SIDE OF HOUSING. REPLACED WITH SERVICEABLE PARTS. SEE MMIR # HEEA0008418 THROUGH #8421 FOR ADDITIONAL PARTS REPLACED.Nov 4, 1996 · N1078D · Bell 206L1SDR HEEA968420Sun Gear · wornSUN GEAR WORN BEYOND LIMITS (SPLINES). REPLACED WITH SERVICEABLE PARTS. SEE MMIR # HEEA0008418 THROUGH #8421 FOR ADDITIONAL PARTS REPLACED.Nov 4, 1996 · N1078D · Bell 206L1SDR HEEA968419Shaft · wornSHAFTWORN BEYOND LIMITS (SPLINES). REPLACED WITH SERVICEABLE PARTS. SEE MMIR # HEEA0008418 THROUGH #8421 FOR ADDITIONAL PARTS REPLACED.Nov 4, 1996 · N1078D · Bell 206L1SDR HEEA968418Case Assy · crackedTHREE EACH CRACK INDICATIONS IN WEB ARMS. REPLACED WITH SERVICEABLE PARTS. SEE MMIR # HEEA0008418 THROUGH #8421 FOR ADDITIONAL PARTS REPLACED.Nov 4, 1996 · N1078D · Bell 206L1SDR CA970311060Nut · cracked(CAN) UPON TRANSMISSON REPLACEMENT, R/H PYLON SUPPORT PAD NUT WAS FOUND CRACKED. L/H PYLON SUPPORT WAS WORN AND POSSIBLE CAUSE OF CRACKING DUE TO POUNDING.Nov 4, 1996 · Bell 206BSDR 97ZZZX1657Indicator · reads highMGT READS 50 DEGREES CELSIUS HIGH ALL THE TIME.Oct 25, 1996 · N4UV · Bell 230SDR HEEA968368Input Seal · leakingSEAL LEAKING. REPLACED SEAL WITH NEW PART.Oct 15, 1996 · N133AE · Bolkms BO105SSDR 96ZZZX5499Seal · leakingM/R TRANSMISSION WAS LEAKING AND SUBSEQUENT INSPECTION FOUND THE TACHOMETER GENERATOR SEAL WAS LEAKING. THE SEAL EDGE SEEMED TO BE ROUGH AND BURNT LOOKING. REPLACED SEAL.Oct 15, 1996 · N5074R · Hughes 369DSDR 96ZZZX5761Wire · shortedNR 1 TRANS PRESSURE PLUG SHORTING OUT CAUSING FLUCTUATION IN GAUGE.Oct 10, 1996 · N317MC · Bolkms BK117C1SDR 96ZZZX5612Drain Valve · crackedDURING OVERHAUL, FOUND THE M/R TRANS DRAIN PLUGS CRACKED AT THE FLANGE COMPLETELY AROUND, BUT NOT YET ALL THE WAY THROUGH THE WALL. REPLACED PART.Oct 8, 1996 · N5074R · Hughes 369DSDR 96ZZZX5935Transmission · making metalTRANSMISSION REMOVED DUE TO METAL CONTAMINATION IN THE OIL. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Oct 4, 1996 · N105LC · Bolkms BO105CBSSDR HEEA968102Indicator · sticksPRESS NEEDLE STICKS 50 TO 80%.Oct 3, 1996SDR HEEA968068Gearshaft · corroded nutCORROSION IN THREADS. REPLACED WITH SERVICEABLE PART.Oct 3, 1996 · N1078G · Bell 206L1SDR HEEA968067Bearing · pittedPITTING ON ROLLERS. REPLACED WITH SERVICEABLE PART.Oct 3, 1996 · N1078G · Bell 206L1SDR HEEA968066Bearing · pittedPITTING ON ROLLERS. REPLACED WITH SERVICEABLE PART.Oct 3, 1996 · N1078G · Bell 206L1SDR HEEA968065Case Assy · corrodedCORROSION IN ORING GROOVE. REPLACED WITH SERVICEABLE PART.Oct 3, 1996 · N1078G · Bell 206L1SDR HEEA968064Case Assy · crackedTWO EACH CRACKS INDICATED IN ONE EACH ARM OF WEB. REPLACED WITH SERVICEABLE CENTER CASE.Oct 3, 1996 · N979BH · Bell 206L3SDR HEEA968063Sun Gear · corrodedCORROSION IN SPLINES OF GEAR. REPLACED WITH SERVICEABLE SUN GEAR.Oct 3, 1996 · N979BH · Bell 206L3SDR HEEA968062Bearing · spalledTRANSMISSION WAS REMOVED FOR METAL IN OIL AND FOUND TRIPLEX BEARING BALLS SPALLING. REPLACED WITH SERVICEABLE TRIPLEX BEARING.Oct 3, 1996 · N5737T · Bell 206L1
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