JASC 6320

Service difficulty reports · 1,930

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 ERAA060586Bearing · failedNEW BEARING THAT HAS ROLLER FALLING OUT OF CAGE.Jan 13, 1999SDR CA990119004Gear · cracked(CAN) RING GEAR WAS REMOVED TO REPAIR A STUD IN THE LOWER HOUSING. ON INSPECTION, A CRACK WAS FOUND IN THE LOWER FLANGE OF THE RING GEAR. THE RING GEAR WAS REPLACED.Jan 11, 1999 · Skrsky S61NSDR QXEA9900298Frame · dentedPDX - FORWARD CARGO DOOR APERTURE FRAME DENTED AND SLIGHTLY PROTRUDING INTO APERTURE. REPAIRED IAW FOKKER SRM 53-02-16, FIGURE 1.Dec 31, 1998 · N499US · Fokker F28MK4000SDR ERAA060581Quill Assy · mismanufacturedINSPECTION OF INPUT QUILL ASSY REVEALED THAT INCORRECT SHIMMING PROCEDURE RESULTED IN CAP ASSY AND PINION HAVING TO BE REPLACED. INSTALLED NEW CAP, BEARINGS, SEALANT PACKINGS. PINION THAT WAS REMOVED WAS SENT TO ABLE METALLICS FOR REPLATING DUE TO COPPER PLDec 30, 1998 · N177EH · Bell 412SDR 99ZZZX773Transmitter · erraticTRANSMITTER HAS ERRATIC PRESSURE INDICATIONS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Dec 19, 1998 · N5194C · Bolkms BK117B1SDR CA990111006Bearing · misinstalled(CAN) DURING MAIN ROTOR REPLACEMENT, A LARGE AMOUNT OF ROTATIONAL PLAY, APPROXIMATELY 2 INCHES DISCOVERED, MAX SHOULD BE 0.060 INCH. UPPER YOKE ASSY BEARINGS IMPROPERLY INSTALLED, NOT PRESSED IN DEEP ENOUGH AND AT AN ANGLE, SCORING THE YOKE. INBOARD ARM ATTADec 14, 1998 · Robsin R44SDR 99ZZZX49Gear · galledDISASSEMBLED, CLEANED AND INSPECTED AND FOUND EXCESSIVE GALLING ON PINION AND T/M GEARS. PINION GEAR HAD EXCESSIVE GALLING ON GEAR TEETH POSSIBLY DUE TO IMPROPER MESHING OF T/M AND PINION GEARS. SECONDARY DAMAGE: T/M GEAR P/N 6893673 S/N NN145514, TT: 648.Dec 3, 1998 · N477AL · Bell 407SDR AU981597Gear · broken(AUS) MAIN TRANSMISSION MAIN DRIVE GEAR TOOTH BROKEN OFF.Nov 27, 1998 · Hughes 369DSDR HEEA0016785Main Case · mismanufacturedRECEIVED CASE FROM BELL, NO PLUG INSTALLED.Nov 11, 1998 · Bell 206L3SDR HEEA0016780Pump · leakingTRANSMISSION OIL PUMP LEAKING.Nov 11, 1998 · N437PH · Bell 407SDR CA981123004Gear · cracked(CAN) ON POST-FLIGHT INSPECTION, CRACK FOUND ON LOWER FLANGE OF THE MAIN GEARBOX RING GEAR.Nov 11, 1998 · Skrsky S61NSDR HEEA0016721Bearing Bushing · mismarkedBUSHING P/N 4639-310-007 WAS SENT PACKAGED IN A BOX TAGGED P/N 4639-311-008.Nov 6, 1998 · Bolkms BK117A4SDR HEEA0016720Upper Housing · damagedTOP CASE LINER LOOSE AND DAMAGEDNov 6, 1998 · N7136H · Bolkms BO105SSDR HEEA0016719Lower Housing · wornINTERNAL SHAFT SEAT WORN.Nov 6, 1998 · N911HM · Bolkms BO105SSDR HEEA0016717Transmission · making metalTRANSMISSION MAKING METAL.Nov 6, 1998 · N81992 · Bolkms BO105SSDR HEEA0016716Transmission · making metalMAKING METAL. INSPECT AND REPAIR DUE TO METAL IN OIL AND EXCESSIVE CORROSION ON TOP OF MAST. ALSO SENDING ROTOR BRAKE AND DISK, MAST DRIVE ADAPTER ASSY, (2) PITCH LINKS, (2) CONTROL LEVERS, (1) CONTROL FORK ASSY AND (1) BEARING BLOCK, (1) HINGED SUPPORT.Nov 6, 1998 · N911PF · Bolkms BO105SSDR HEEA0016715Ring Gear · crackedMAKING METAL. FOUND RING GEAR CRACKED AT ALIGNMENT BOLT HOLE FORWARD POSITION. ALSO FOUND COLLECTOR WHEEL, SUNGEAR , 2 EACH INTERMEDIATE SHAFT, 5 EACH PLANETARY GEARS SPALLING. REPAIRED TRANSMISSION AND INSTALLED SERVICEABLE PARTS.Nov 6, 1998 · N911HM · Bolkms BO105SSDR HEEA0016714Bearing · spalledMAKING METAL. FOUND MAST BEARING SPALDING AND WAS CAUSE OF METAL. REPAIRED TRANSMISSION AND INSTALLED NEW MAST BEARING.Nov 6, 1998 · N7136H · Bolkms BO105SSDR AU981525Drive · stripped(AUS) MAIN TRANSMISSION FAN PULLEY DRIVE STRIPPED. SUSPECT INCORRECTLY TORQUED AT LAST MAINTENANCE CHECK.Nov 3, 1998 · Bell 47G5ASDR AU981413Sump · clogged(AUS) RECENTLY OVERHAULED MAIN TRANSMISSION CONTINUALLY RUNNING HOT. INVESTIGATION FOUND THAT THE SUMP WAS SLUDGED.Oct 28, 1998 · Robsin R22ALPHASDR HEEA0016492Indicator · reads highOIL TRANSMITTER INDICATION INTERMITTENTLY STICKS AND READS HIGH.Oct 27, 1998 · N22608 · Bell 412SDR HEEA0016342Pump · corrodedPORT PLATE CORRODED.Oct 22, 1998 · N6957Y · Bell 214STSDR HEEA0016308Transmission · making metalTRANSMISSION HAS METAL IN OIL.Oct 22, 1998 · N5435V · Skrsky S76ASDR HEEA0016167Case Assy · defectiveTRANSMISSION UNABLE TO OBTAIN PROPER BACKLASH ON QUILLS. POSSIBLE DEFECTIVE PART.Oct 16, 1998 · Bell 412SDR CA981007012Crossbeam · cracked(CAN) MAIN ROTOR GEARBOX CROSSBEAM CRACKED AT BOTH ENDS ON THE THIN SIDE OF THE RADIUS FLAT SURFACE.Sep 30, 1998 · Snias AS350BSDR HEEA0016039Case · crackedCRACK INDICATION ON BOTTOM OF MAIN CASE, INSIDE AND OUT, IN SAME PLACE. SCRAPPED CASE AND REPLACED WITH NEW CASE.Sep 11, 1998 · N6610E · Bell 206L3SDR 99ZZZX850Switch · inoperativeOIL PRESSURE WARNING SWITCH INOPERATIVE. WILL NOT TURN OFF MAIN TRANSMISSION PRESSURE WARNING LIGHT. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Sep 7, 1998 · N202LF · Bolkms BO105LSA3SDR HEEA0015986Chip Detector · damagedHEAD ROUNDED OFF ON CHIP DETECTOR.Sep 4, 1998 · N6100R · Snias AS350B2SDR 98ZZZX3543Bearing · misinstalledBEARING FAILED AFTER INCORRECT INSTALL. INSP OF WHAT APPEARED TO BE EXCESS BACKLASH ON THE 47-620-497-1 FAN DRIVE GEAR ASSY. UPON REMOVAL OF FAN DRIVE QUILL ASSY, NOTED NEW GEAR PATTERN AFT AND HIGH RUNNING OFF HEEL OF 530 GEAR. UPON REMOVAL OF CLUTCH, DETESep 1, 1998 · N100VB · Bell 47G3B1SDR HEEA0015903Indicator · malfunctionedINDICATOR STICKS AT 30 PERCENT PRESSURE SIDE.Aug 28, 1998 · N3893S · Bell 412SDR HEEA0015886Main Case · wornMAIN CASE ASSEMBLY HAS WORN I/P LINER AND 4 EACH STUD HOLES AT UPPER MATING SURFACE HAVE CORROSION.Aug 27, 1998 · Bell 206L1SDR HEEA0015763Indicator · reads highPRESSURE READS HIGH OUT OF TOLERANCE.Aug 25, 1998 · N20898 · Bell 206L1SDR HEEA0015707Switch · malfunctionedLIGHT COMES ON INTERMITTENTLY ON PRESSURE SWITCH.Aug 19, 1998 · N406PH · Bell 407SDR 99ZZZX3041Bearing · failedOUTER RACE OF DUPLEX BEARING BREAKING DOWN.Aug 17, 1998 · N2146F · Bell 206BSDR HEEA0015597Indicator · stickingTRANSMISSION O8IL PRESSURE PSI NEEDLE STICKY AT 20 PSI.Aug 14, 1998 · N3893S · Bell 412SDR HEEA0015504Switch · failedTRANSMISSION PRESSURE LIGHT WILL NOT GO OUT WHEN OIL PRESSURE GOES THROUGH 38 PSI.Aug 13, 1998 · N467PH · Bell 407SDR 98ZZZX3367Inserts · looseUPON VISUAL INSPECTION OF PARTS, FOUND 1 EACH INSERT PULLED OUT OF GEARBOX HOUSING AND 2 EACH INSERTS LOOSE AT EXCITER BOX MATING SURFACE. ONE EACH INSERT P/N NAS1394-3L WAS PULLED OUT AND 2 EACH INSERTS WERE FOUND LOOSE. POSSIBLE CAUSE IS EXCESSIVE CLEARANCAug 7, 1998 · N407AL · Bell 407SDR 98ZZZX3363Insert · looseUPON VISUAL INSPECTION OF ALL PARTS, FOUND 1 EACH INSERT PULLED OUT AND 2 EACH INSERTS LOOSE AT EXCITER BOX MATING SURFACE ON GEARBOX HOUSING. ONE EACH INSERT P/N NAS1394-3L PULLED OUT AND 2 EACH INSERTS LOOSE. POSSIBLY CAUSED BY EXCESSIVE CLEARANCE BETWEEN Aug 7, 1998 · N457AL · Bell 407SDR HEEA0015473Indicator · sticksPRESSURE GAUGE STICKS AT 50 PSI.Jul 30, 1998 · Bell 206L1SDR HEEA0015467Link Assy · wornLINK ASSEMBLY HAS WORN SPINDLE.Jul 30, 1998 · N50034 · Bell 206L1SDR HEEA0015453Oil Pump · failedLOW OIL PRESSURE FOUND ON OIL PUMP.Jul 30, 1998 · N5029H · Bolkms BO105SSDR HEEA0015451Pinion Assy · wornTRANSMISSION PINION ASSEMBLY HAS WORN SEAL WEAR SLEEVE BEYOND LIMITS.Jul 30, 1998 · N141PH · Bell 412SDR HEEA0015446Indicator · fluctuatesGEARBOX OIL PRESSURE NEEDLE FLUCTUATES. TIME SINCE REPAIR, 42:40 HOURS.Jul 30, 1998 · N1202T · Bell 412SDR HEEA0015442Indicator · failedPRESSURE GAUGE READS APPROXIMATELY 181 POUNDS. TOO LOW, LEAKS.Jul 30, 1998 · N5012V · Bell 206L1SDR HEEA0015423Seal · leakingMAIN ROTOR DRIVE SEAL LEAKING.Jul 30, 1998 · N2149S · Bell 412SDR HEEA0015422Seal · leakingMAIN ROTOR DRIVE SEAL LEAKING.Jul 30, 1998 · N33008 · Bell 412SDR 98ZZZX4438Line · corrodedOIL WAS RUNNING OUT OF THE DRAIN HOLE BOTTOM SIDE OF THE HELICOPTER. FOLLOWING LINES HAD PIN POINT HOLES CAUSED BY CORROSION. P/N 206-070-450-001, TUBE ASSY, TORQUE, ENGINE. P/N 206-070-446-001, TUBE ASSY, OIL, ENGINE. OIL PASSING THESE HOLES EMANATING THEJul 30, 1998 · Bell 206B3SDR 99ZZZX772Transmitter · intermittentTRANSMITTER UNIT OPERATES INTERMITTENTLY. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Jul 23, 1998 · N10UM · Bolkms BK117B1SDR 98ZZZX2778Pump · failedPRE-FLIGHT INSP FND XMSN FLUID FULL. AFTER START AND SPOOL UP THRU 70 PERCENT NR, PILOT NOTICED XMSN CHIPS LIGHT. PILOT SHUT DOWN, FND FUZZ AND FERROUS FLAKES ON CHIP PLUGS. CLEANED AND RE-INSTALLED. UPON RE-START, XMSN CHIPS LIGHT. FLUID LEVEL FOUND AT AJul 23, 1998 · N1107T · Hughes 369DSDR CA981125030Transmission · making metal(CAN) MAIN ROTOR TRANSMISSION MAKING METAL (FLAKES). THE TRANSMISSION INCREASED 25C. SLIGHT OIL PRESSURE DECREASE.Jul 15, 1998 · Bell 206B
Back to JASC 6320