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.
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
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 KBMA111987Bearing · wornBEARING WORN BEYOND LIMITS. REMOVED AND REPLACED WITH OVERHAULED UNIT.SDR ISHA077179Bevel Gear · defectiveREJECTED BY NAMPA VALLEY HELICOPTERS DUE TO PITTING AND UNABLE TO ESTABLISH STATIC GEAR PATTERN REPLACED WITH EXCHANGE ASSY.SDR ISHA077178Pinion Gear · defectiveGEAR REJECTED AT INTERMOUNTAIN TURBINE FOR PITTING AND UNABLE TO ESTABLISH PROPER STATIC GEAR PATTERN REPLACED ASSY. WITH EXCHANGESDR ERAA077292Bearing · failedBEARING ROLLER FALLS OUT OF CAGE.SDR HEEA077215Shaft · corrodedEXCESSIVE CORROSION AT TAIL ROTOR OUTPUT SHAFT DRIVE SPLINES.SDR CA011029017Lever · cracked(CAN) THE TAIL ROTOR CONTROL LEVER MAYBE THE SAME AIRFRAME TIME BUT WE ARE NOT 100 PERCENT SURE. THE TAILROTOR CONTROL LEVER HAD A DEFECT OF WEAR ON INSIDE EAR. UPON REMOVAL MAINTENANCE ENGINEER FOUND CRACKS IN THE WEBBING, TOP SIDE AT T/R SPIDER ATTACHMENT POSDR CA011109007Segment · missing(CAN) UPON INSTALLATION OF THE NEW CHAIN, THE ENGINEER NOTICED A SPACE BETWEEN SOME CHAIN LINKS. CHAIN IS MISSING A SEGMENT.SDR HEEA076899Gearbox · wornOUTPUT SHAFT SPLINE WORN. REPLACED WITH SERVICEABLE T/R GEARBOX ASSEMBLY.SDR CA011029011Carbon Seal · cracked(CAN) DURING A GROUND RUN ON OIL LEAK WAS DETECTED FROM THE TAIL ROTOR GEAR BOX. AIRCRAFT WAS SHUT DOWN LEAK INVESTIGATED. OIL LEAK FROM INPUT MAG SEAL. SEAL AND HOUSING REMOVED. THE STATIONARY PORTION OF SEAL FOUND TO HAVE MULTIPLE CRACKS. MAG SEAL WAS PREVIOSDR 2002FA0000022Gear · misalignedUNABLE TO ESTABLISH ACCEPTABLE GEAR PATTERN ON PINION.SDR CA011031017Gearbox · damaged(CAN) DURING ROUTINE 100 HOUR INSPECTION OIL DRAINED FROM T/R GEARBOX, FOUND EXCESSIVE SLUG & METAL PARTICLES ON CHIP DRAIN PLUG. FLUSHED GEARBOX. ADDED FRESH OIL. DISCONNECT INPUT SHAFT & ROTATED INPUT GEAR WITH T/R ATTACHED TO OUTPUT SIDE. NOISE NOTED FROM ISDR HEEA076628Bearing · wornWORN BEARING.SDR HEEA076384Boot · leakingBOOT SEAL LEAKING.SDR HEEA076383Boot · leakingBOOT SEAL LEAKING.SDR CA011012009Shaft · broken(CAN) GEARBOX RECEIVED FROM CUSTOMER WITH COMPLAINT OF T/R VIBRATION AND METAL GENERATION. ON STRIP DOWN THE OUTPUT GEARSHAFT WAS REMOVED AND THE OUTPUT JOURNAL AND THE END OF THE OUTPUT GEARSHAFT WERE FOUND INSIDE OF THE ALIGNMENT BEARING.THE OUTPUT GEARSHAFTSDR KBMA88798Bearing · wornTEETER BEARINGS WORN, INSTALLED NEW TEETER BEARINGS.SDR HEEA075959Seal · leakingSEAL LEAKING. REPLACED WITH SERVICEABLE PART.SDR CA010912018Gearbox · making metal(CAN) DURING A HELICOPTER ENGINE PERFORMANCE CHECK AT 2000 FT CRUISE, THE TAIL ROTOR GEARBOX CHIP LIGHT ILLUMINATED AND STAYED LIT. AFTER LANDING AT BASE, THERE WAS METAL FLAKES PRESENT ON CHIP DETECTOR. T/R GEARBOX WAS FLUSHED, CHIP DETECTOR CLEANED, & RE-INSSDR AC2A075849Bearing · brinelledINNER RACE WORN. IT WAS BRINNELING. REPLACED WITH NEW.SDR AUS20010925Shaft · distorted(AUS) TAIL ROTOR GEARBOX OUTPUT SHAFT BEARINGS BREAKING UP AND SHAFTRUNOUT EXCESSIVE. SHAFT RUNOUT APPROXIMATELY 0.457MM (0.018IN). MAXIMUM RUNOUT 0.0254MM (0.001IN).SDR HEEA075545Gearbox · leakingINPUT QUILL SEAL LEAKING. REPLACED WITH SERVICEABLE ASSY.SDR HEEA075503Gearbox · making metalMAKING METAL. REPLACED WITH SERVICEABLE PART.SDR HEEA075502Gearbox · damagedPLAY IN OUTPUT SHAFT, UNABLE TO BALANCE TAIL ROTOR. REPLACED WITH SERVICEABLE PART.SDR 2001F00386Bearing · wornT/R LAMINATED TEETER BEARINGS WORN. REPLACED WITH NEW BEARINGS. (M)SDR CA010726034Plate · worn(CAN) BLACK PAINT INDEX MARKS MISALIGNED AND OUTBAOARD SPACER FREE TO ROTAT. UNIT IS POST MOD 07-6554 PART 2.B.3 AND POST MOD 07-6551. RECEIVED IN SHOP, DOUBLE LOCKING OF NUT VERIFIED ALL VISIBLE ELEMENTS INBOARD OF BEARING FELT TIGHT AND SECURE, NUT UNLOCKED SDR ERAA074828Gearbox · damagedBEARINGS SCORED AND INPUT BUSHING FRETTING. DISASSEMBLED, VISUALLY INSPECTED. REPLACED ALL FIVE BEARINGS, INPUT BUSHING, ALL O RINGS, ALL SEALING RINGS, BOTH SEALS, ONE SCREW AND THE LOCKING PLATE. REASSEMBLED, SET GEAR DISTANCE, BACKLASH & PATTERN PRO-SEALESDR KBMA88664Bearing · wornTEETER BEARINGS WORN. REMOVED AND REPLACED WITH NEW BEARINGS.SDR BAQ2001F00000Gearbox · crackedWHILE DURING PRE-FLIGHT (DAILY) OF AIRCRAFT, FOUND TR 90 PERCENT GEAR BOX LOOSE. REMOVED GEAR BOX AND FOUND STUDS LOOSE ON GEAR BOX. INSPECTED FITTING AND ALSO FOUND CRACKED.SDR KBMA88666Bearing · wornBEARINGS ARE WORN. REMOVED AND REPLACED WITH NEW BEARINGS.SDR TI1R001487Bearing · deterioratedBEARING, BUSHINGS DETERIORATED AND WORN. REMOVED AND REPLACED.SDR HEEA073749Housing · leakingLEAKING. REPLACED WITH SERVICEABLE PART.SDR HEEA073728Seal · leakingSEAL LEAKING OIL. TO BE RETURNED TO VENDOR.SDR ERAA074626Gearbox · making metalGEARBOX IS MAKING METAL. BEARINGS BREAKING DOWN. ACTION TAKEN: OVERHAULED, DISASSEMBLED, CLEANED, VISUALLY INSPECTED AND NDT. C/W TB 412-99-157. INSTALLED NEW BEARINGS OP SHAFT, EXCLUDER ASSY AND ALL SEALING ELEMENTS. REASSEMBLED 90 DEGREE GEARBOX AND CHECSDR HEEA073788Bearing · wornINBOARD BEARING WORN. REPLACED WITH SERVICEABLE T/R PITCH LINK.SDR PN12001F00001Case · misdrilledTAIL ROTOR GEAR BOX USE SAFETY WIRE HOLES DRILLED OF CENTER AND THRU WALL OF TABS. REPLACED CASE AND DUPLEX BEARING.SDR IIF2001F00000Shaft · corrodedDURING THE FIRST 2500 HOUR OVERHAUL, FOUND CORROSION ON INBOARD SPLINES AND PITTING BEYOND LIMITS. PROBABLE CAUSE DUE TO BREAKDOWN GREASE. SUGGEST THAT TAIL ROTOR BUB AND BLADES ASSEMBLY NEEDS TO BE REMOVED PERIODICALLY AND SPLINES INSPECTED AND LUBRICATED WSDR LS1R073118Gearbox · making metalTAIL ROTOR GEARBOX IS MAKING METAL.SDR HEEA073115Bearing · crackedPITCH CONTROL BEARINGS CRACKED.SDR 20010606CW010Gearbox · looseUPON COMPLETION OF A 1.7 HR FLT, PILOT NOTICED SHUDDERING VIBRATION AFTER ROLLING THE TWIST GRIP TO IDLE. PILOT REPORTED PROBLEM TO MAINT, INSPECTION REVEALED MOVEMENT BETWEEN T/R G/B AND TAILBOOM CASTING. THREE G/B STUD NUTS WERE FOUND LOOSE, ONE ALIGNMENTSDR HEEA073027Gearbox · making metalTAIL ROTOR GEARBOX MAKING METAL.SDR 20010524CW002Housing · crackedDURING TEARDOWN FOR OVERHAUL, A CRACK WAS VISUALLY NOTICED AT APPROX THE 2 OCLOCK POSITION(AS INSTALLED ON AIRCRAFT) IN THE STRADDLE MOUNT OF THE IDLER GEAR ALIGNMENT BEARING PN SB2154-1 OF CENTER HOUSING PN 6435-66409-043. FURTHER INSPECTION AFTER REMOVAL OFSDR TI1R001456Bearing · crackedBEARING - CRACKED/SPLIT. REMOVED AND REPLACEDSDR CA010504004Shaft · broken(CAN) - METAL GENERATION, SCHEDULED 100 HOUR INSPECTION.- GEARBOX REMOVED AND SENT FOR REPAIR. - TEARDOWN INSPECTION FOUND THAT THE INPUT GEARSHAFT HAD FAILED INBOARD OF THE INPUT GEAR.- THIS GEARBOX HAD BEEN REPAIRED ON 3 PREVIOUS OCCASIONS FOR CLOUDY OIL/SLUSDR 20010511CW007Gearbox · failedUPON SHUT DOWN, THE PILOT AND MECH NOTICE AN ODD NOISE COMING FROM THE TAIR ROTOR ACCOMPANIED BY A SLIGHT VIBRATION. AIRCRAFT WAS DUE FOR A 100 HR INSPECTION, SO T/R OIL WAS DRAINED AGAIN. THE CHIP PLUG HAD NO CHIPS BUT DID HAVE A BLACK PASTE. PASTE WAS EXASDR HEEA072470Housing · leakingTAIL ROTOR GEARBOX INPUT SEAL LEAKING. REPLACED WITH SERVICEABLE PART.SDR AC2A072825Seal · leakingTAIL ROTOR GEAR BOX WAS LEAKING FROM OUT PUT SEAL. WHEN SEAL WAS RENOVED IT WAS DISCOVERED THAT THE SEAL LIP HAD SEALENT MIL-S-8784 ON IT. THIS SEALENT IS USED ON THE OUTER SURFACE OF THE SEAL WHEN INSTALLING. REPLACED SEAL.SDR KBMA88691Bushing · wornTAIL ROTOR SPIDER SPLIT BUSHINGS WORN BEYOND LIMITS.SDR KBMA88686Bearing · delaminatedTAIL ROTOR BEARINGS DELAMINATEDSDR TI1R001424Bearing · wornBEARING, WORN. REMOVED AND REPLACED.SDR KBMA88583Laminated Hinge · delaminatedHINGE DELAMINATED
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