JASC 6520

Service difficulty reports · 865

Reports filed under 6520 · Tail 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 = '6520'
  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 HEEA064843Spline Adapter · strippedSPLINE STRIPPED.Oct 19, 1999 · N721PH · Bell 407SDR HEEA064668Adapter · damagedSPLINE DAMAGED.Oct 5, 1999 · N407PH · Bell 407SDR CA000110002Bearing · making metal(CAN) INPUT ALIGNMENT BEARING MAKING METAL (CHIP LITE IN FLIGHT). GEARBOX STRIPPED TO DETERMINE CAUSE OF METAL GENERATION.Oct 4, 1999 · Hughes 369DSDR HEEA064658Adapter · wornSPLINES WORN CONSIDERABLY ON THE TRANSMISSION OIL PUMP SIDE.Oct 4, 1999 · N719PH · Bell 407SDR CA991007024Gear · worn(CAN) GEAR TOOTH MAKING METAL DUE TO PREMATURE WEAR. GEAR PAIR S/N ZF4956. GEAR PAIR REPLACED.Oct 1, 1999 · Snias AS350*SDR CA991007023Gear · worn(CAN) TAIL ROTOR GEARBOX MAKING METAL. PREMATURE WEAR OF GEAR TEETH/GEAR PAIR S/N ZF4912. GEAR PAIR WAS REPLACED.Oct 1, 1999 · Snias AS350*SDR CA991209010Gearbox · making metal(CAN) UNIT MAKING METAL (GENEROUS AMOUNTS).Sep 30, 1999 · Snias AS350BASDR CA991209008Bearing · failed(CAN) UNIT FAILED THE ROTATIONAL DRAG TORQUE CHECK SET OUT IN DGAC AD 1999-085-076(A)R2.Sep 30, 1999 · Snias AS350BASDR 99ZZZX4090Stud · failedMOUNTING STUDS, 6 EACH, FAILED SUB-SURFACE AT 90 DEGREE GEARBOX MOUNTING FLANGE (APPARENT TENSILE FAILURE). SUBMITTER SUSPECTED PREVIOUS VIBRATORY OR OVER-TORQUE DAMAGE TO MOUNTING STUDS.Sep 21, 1999 · N32800 · Bell UH1HSDR HEEA064458Rod · wornPITCH ROD BEARINGS WORN. SERIAL NUMBERS REMOVED ARE S2863 AND S2250. REPLACED WITH SERIAL NUMBERS S3693 AND S3624.Sep 17, 1999 · N350BZ · Snias AS350B2SDR HEEA064457Rod · wornPITCH ROD BEARINGS WORN. REPLACED WITH SERIAL NUMBERS S3613 AND S3845.Sep 17, 1999 · N40466 · Snias AS350B2SDR HEEA064456Rod · wornPITCH ROD BEARINGS WORN. REPLACED WITH SERIAL NUMBERS S3672 AND S3739.Sep 17, 1999 · N60951 · Snias AS350B2SDR HEEA064454Gearbox · making metalGEARBOX MAKING METAL.Sep 16, 1999 · N6097Z · Snias AS350B2SDR 99ZZZX4578Case · wornPRE-FLIGHT INSPECTION FOUND MOUNTING PADS WORN BEYOND LIMITS IN BHT 407 CR&O MANUAL. ONE EACH DOW ALIGNMENT PIN BROKEN. FURTHER TEAR-DOWN REVEALED HIGH GEAR BACKLASH AND SCARING OF THE GEAR TEETH. POSSIBLY DUE TO LOW OR ABSENCE OF OIL AT THE SAME TIME. HISep 8, 1999 · N407AL · Bell 407SDR HEEA064335Seal · pittedSEAL PITTED. REFERENCE: DMR NR 686436.Sep 7, 1999 · N510PH · Bell 407SDR 99ZZZX3804Hinge · crackedCRACKS IN RUBBER, COULD NOT BALANCE TAIL ROTOR BLADES.Sep 7, 1999 · N911NT · Snias AS350BSDR CA000404010Gearbox · making metal(CAN) MAKING METAL. FERROUS FLAKES SET OFF THE CHIP LIGHT. DRAINING OF THE OIL REVEALED NON-FERROUS METAL AS WELL. OIL HAD APPEARANCE OF MILKY PAINT.Aug 24, 1999 · Snias AS350BSDR HEEA063274Gear · scoredBEARING SEAT SCORED. REPLACED WITH SERVICEABLE GEAR ASSY.Aug 10, 1999 · N3897N · Bell 214STSDR HEEA063273Shaft · failedFAILURE IN THREAD AREA OF OUTPUT SHAFT. REPLACED WITH SERVICEABLE OUTPUT SHAFT.Aug 10, 1999 · N8045T · Bell 214STSDR HEEA063271Shaft · corrodedGEARBOX REMOVED DUE TO CORROSION AND WEAR ON SPLINES. FOUND 1 EACH SPLINE BROKEN. REPLACED WITH SERVICEABLE OUTPUT SHAFT.Aug 10, 1999 · N3897N · Bell 214STSDR CA991028037Seal · leaking(CAN) INPUT SEAL LEAKING HYDRAULIC FLUID. NEW SEAL INSTALLED.Aug 6, 1999 · Bell 206L3SDR 20000713SH018Bearing · failedTHIS HAS BEEN THE SECOND OCCURRENCE IN WHICH THE T/R SPHERICAL BEARINGS HAVE FAILED. THE FIRST OCCURRED AT ACTT: 138.2 HOURS IN WHICH THE MECHANIC FOUND THE BEARING ELASTOMERS TORN BEYOND LIMITS. THE SECOND FAILURE OCCURRED AT 748.7 HOURS ACTT, PART TT, 610Jul 30, 1999 · N318SA · Snias AS350BASDR HEEA063417Housing · crackedHOUSING CRACKED AT MOUNTING EAR. REPLACED WITH SERVICEABLE PART.Jul 29, 1999 · N5031U · Bolkms BO105SSDR HEEA063125Seal · leakingSEAL LEAKING.Jul 28, 1999 · N8595X · Bell 407SDR HEEA063097Seal · leakingSEAL LEAKING.Jul 28, 1999 · N402PH · Bell 407SDR HEEA062999Gearbox · making metalTAIL ROTOR GEARBOX MAKING METAL. REFERENCE: DMR NR 686197.Jul 23, 1999 · N447PH · Bell 407SDR HEEA063008Bearing · wornBALL END BEARINGS WORN.Jul 22, 1999 · N4000L · Snias AS350B2SDR HEEA062907Bevel Gear Set · spalledBEVEL GEAR SET SPALLING.Jul 12, 1999 · N911RS · Bolkms BO105CBSSDR HEEA062906Transmission · crackedTAIL ROTOR TRANS HAD CRACKED MAIN CASE. REPLACED WITH SERVICEABLE PART.Jul 12, 1999 · Bolkms BO105SSDR HEEA062831Gearbox · damagedCOULD NOT MOUNT GEARBOX - FOUND STUDS BENT. REPLACED WITH SERVICEABLE ASSY.Jul 12, 1999 · N22347 · Bell 412SDR HEEA062755Bearing · roughBEARING ROUGH WHEN ROTATING. REFERENCE: MA NR R019985.Jul 8, 1999 · N4000L · Snias AS350B2SDR HEEA062750Rod · crackedCRACKED BUSHING. REFERENCE: RMA NR R020074.Jul 8, 1999 · N40466 · Snias AS350B2SDR HCMA066335Hinge · wornBEARINGS WORN BEYOND LIMITS.Jun 30, 1999 · N862BH · Snias AS350BASDR CZMA082748Gearbox · making metalEXCEESIVE METAL DEPOSITS ON CHIP DETECTOR REPLACED GEARBOX WITH NEW PART FROM MANUFACTURERJun 28, 1999 · N911BE · Bell 412SDR HEED064579Housing · corrodedTAIL ROTOR GEARBOX S/N: A239-00202 REMOVED FROM AIRCRAFT DUE TO LEAKING. FOUND OUTPUT HOUSING (ABOVE) QUADRANT ATTACHMENT BOLT HOLE AREA CORRODED. REPLACED WITH NEW OUTPUT HOUSING.Jun 25, 1999 · N478X · Skrsky S76CSDR HEEA062525Gearbox · corrodedTAIL ROTOR GEARBOX HAS EXCESSIVE CORROSION ON OUTPUT SHAFT SPLINES.May 26, 1999 · N405PH · Bell 407SDR HEEA062503Gearbox · corrodedTAIL ROTOR ASSEMBLY RUSTED TO SPLINES ON T/R GEARBOX.May 26, 1999 · N612PH · Bell 407SDR HCMA075172Bearing · tornPART IS TORN BEYOND LIMITS AND THE T/R WILL NOT BALANCE.Apr 29, 1999 · N992BH · Snias AS350B2SDR HEED064537Chip Detector · looseCHIP DETECTOR HAS PLUG LOOSE IN HOUSING AND BODY VALVE WILL NOT SEAT. ORDERED REPLACEMENT.Apr 27, 1999 · N236X · Bell 230SDR 99ZZZX2503Hinge · crackedRUBBER BLOCK IS CRACKED AND DISTORTED.Apr 23, 1999SDR CA990521004Gearbox · making metal(CAN) TAIL ROTOR GEARBOX MAKING DOME SHAPED METAL CHIPS. SUSPECT BEARING FAILURE. ONE OTHER SIMILAR OCCURRENCE REPORTED.Apr 9, 1999 · Snias AS350BSDR HEEA061814Gearbox · seizedTAIL ROTOR SPIDER BEARING SEIZED. ASSEMBLY THEN BROKE AT PIPE.Apr 8, 1999 · N6095S · Snias AS350B2SDR 99ZZZX1718Seal · leakingINPUT SEAL LEAKING. REPLACED WITH NEW SEALS FROM BELL HELICOPTER.Apr 6, 1999 · N97SP · Bell 407SDR HEEA061789Case · corrodedTAIL ROTOR GEARBOX CORRODED ON CASE ASSEMBLY.Apr 5, 1999 · N135AE · Bolkms BO105SSDR HEEA061325Boot · splitOUTPUT SEAL BOOT ON HOUSING SPLITTING.Mar 23, 1999 · N57416 · Bell 407SDR HEEA061324Bearing · wornWORN TRUNNION BEARING.Mar 23, 1999 · N57416 · Bell 407SDR HEEA061173Gearbox · leaksLEAK FROM INPUT AND MAYBE FROM OUTPUT IN TAIL ROTOR GEARBOX.Mar 19, 1999 · N6097Z · Snias AS350B2SDR HEEA060967Gearbox · corrodedCORRODED SPLINES WHERE TAIL ROTOR IS MOUNTED.Mar 5, 1999 · N510PH · Bell 407SDR HEEA060705Gearbox · corrodedCORROSION PITS ON OUTPUT SHAFT.Feb 22, 1999 · N142PH · Bell 412SDR 99ZZZX1236Balance Wheel · damagedTEAR-DOWN TO PERFORM REPAIR. BALANCE WHEEL PN 206-011-716-001 NOT TORQUED ON SHAFT, CAUSED WHEEL AND SHAFT TO BE DAMAGED BEYOND LIMITS.Feb 17, 1999 · N367AL · Bell 206L3
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