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 HEEA966754Gearbox · crackedCRACKED CORE. INVESTIGATE AND ANALYZE CASE.Feb 28, 1996 · Hughes 369DSDR ERAA96204Roller Bearing · making metalGEARBOX MAKING METAL. INNER RACE HAS DAMAGE THAT CAN BE FELT WITH A PROBE.Feb 26, 1996 · N133EH · Bolkms BO105SSDR ERAA96203Roller Bearing · making metalNEW BEARING THAT HAS PITTING ON OUTER RACE, GEARBOX MAKING METAL.Feb 26, 1996 · N133EH · Bolkms BO105SSDR ERAA96202Bearing · making metalGEARBOX MAKING METAL, OUTER RACE HAS PITS, ROLLERS ARE ROUGH.Feb 26, 1996 · N133EH · Bolkms BO105SSDR HCMA9610Seal Magnetic · defectivePART IS DEFECTIVE. LEAKS BADLY.Feb 21, 1996 · N972BH · Snias AS350B2SDR 96ZZZX1068Housing · crackedDURING ROUTINE INSPECTION, A .75 INCH LONG CRACK WAS FOUND IN THE FORWARD RT ATTACHMENT MOUNT. THIS HOUSING IS MANUFACTURED FROM MAGNESIUM WHICH REQUIRES A ROUTINE INSPECTION. C/W SB 61B35-48 REPLACES THIS ITEM WITH AN ALUMINUM HOUSING WITH MUCH THICKER MOUNFeb 12, 1996 · N612RM · Skrsky S61NSDR HCMA962Rear Rotor · worn excessPART IS WORN EXCESSIVELY. REMOVED AND REPLACED.Feb 9, 1996 · N312B · Snias AS350BASDR HEEA966623Gear Box · yoke seizedCOULD NOT REMOVE T/R YOKE ASSEMBLY FROM GEARBOX ASSEMBLY.Feb 5, 1996 · N6097Z · Snias AS350B2SDR CA960312007Gearbox · teeth wear(CAN)CHIP LIGHT ON. PLUG INSPECTED AND FOUND GRAY PASTE. 23.2 HOURS LATER DURING 600 HOUR INSPECTION PROBLEM FOUND WITH GEAR TEETH.Jan 30, 1996 · Bell 206BSDR 96ZZZX4105Gearbox · making metalTAIL ROTOR GEAR BOX RECENTLY OVERHAULED. MADE METAL AFTER 154.8 HOURS SINCE OVERHAUL. TAIL ROTOR GEARBOX WAS REPLACED. AIRCRAFT TT: 6,253.8 HOURS.Jan 23, 1996 · N216LA · Snias AS350B1SDR HEEA966487Spider · boot looseDUST BOOT P/N 350A33-2069-20 COMING LOOSE FROM SPIDER ASSY AND SLIDING ON SHAFT.Jan 19, 1996 · N60951 · Snias AS350B2SDR 96ZZZX2359Bevel Gear Set · making metalON LANDING AT DESTINATION, THROTTLE AT FLIGHT IDLE. INTERMEDIATE TAIL ROTOR DRIVE GEARBOX CHIP DETECTOR LIGHT ILLUMINATED. FOUND LARGE CHIP MISSING FROM BEVEL GEAR.Jan 18, 1996 · N4572V · Bolkms BO105SSDR HEEA966420Bearing · wornLAMINATED HINGE BEARINGS WORN. INSTALLED NEW TAIL ROTOR HUB ASSEMBLY.Jan 11, 1996 · N6100R · Snias AS350B2SDR CA960129026Seal · leaking(CAN)SEAL LEAKING TO THE POINT WHERE OIL HAS TO BE ADDED DAILY.Jan 11, 1996 · Bell 206L4SDR CA960129024Seal · leaking(CAN)SEAL LEAKING. OIL HAS TO BE ADDED DAILY.Jan 11, 1996 · Bell 206L4SDR CA960129023Seal · leaking(CAN)SEAL LEAKING. REQUIRES OIL TO BE ADDED TO GEARBOX DAILY.Jan 11, 1996 · Bell 206L4SDR CA960122004Bevel Gear · chipped tooth(CAN)CHIP LIGHT ON. CLEANED CHIP PLUG AND DRAINED/FLUSHED T/R GEARBOX. FOUND CHIP FROM BEVEL GEAR SET.Jan 10, 1996 · Robsin R22BETASDR HEED95434Packing · leakingT/R OUTPUT SEAL ON TRANSMISSION LEAKING. REPLACED UNITDec 13, 1995 · N236X · Bell 230SDR HEED95433Packing · leakingT/R OUTPUT SEAL ON TRANSMISSION LEAKING. REPLACED UNITDec 13, 1995 · N236X · Bell 230SDR HEED95432Packing · leakingT/R OUTPUT SEAL ON TRANSMISSION LEAKING. REPLACED UNITDec 13, 1995 · N236X · Bell 230SDR HEED95431Tabloc-Nut · seal leakT/R OUTPUT SEAL ON TRANSMISSION LEAKING. REPLACED TAB LOC UNITDec 13, 1995 · N236X · Bell 230SDR HEED95430Seal · leakingT/R OUTPUT SEAL ON TRANSMISSION LEAKING. REPLACED UNITDec 13, 1995 · N236X · Bell 230SDR 96ZZZX131Housing · crackedDAILY INSPECTION FOUND TAIL ROTOR GEAR BOX CASE CRACKED AT RIGHT MOUNTING STUD.Nov 30, 1995 · N5416F · Bolkms BO105CBSSDR CA951122012Hinge · separating(CAN)TAIL ROTOR VIBRATION. FOUND ELASTOMERIC TO BE SEPARATING.Nov 10, 1995 · Snias AS350BSDR 95ZZZX6348Bolt · wrong partACFT WAS IN FOR A 100-HOUR INSP. MECHANIC PERFORMING TAIL ROTOR GEARBOX MOUNT RE-TORQUE, CUT THE SAFETY WIRE AND THE BOLT PULLED OUT. IT WAS ALSO FOUND THAT 2 OTHER BOLTS WERE ONLY IN PLACE BY 2 THREADS. MECHANIC STATED BOLTS WERE INCORRECT, PN NAS1304-24H,Nov 9, 1995 · N9110F · Hughes 369HSSDR 95ZZZX6979Bearing · looseBEARING UNSTAKED. RMA NR 4004596.Nov 2, 1995 · N20875 · Snias AS350BSDR 95ZZZX6981Seal · leaksMAGNETIC SEAL LEAKS.Oct 3, 1995 · N20875 · Snias AS350BSDR 95ZZZX6512Gearbox · misrepairedGEARBOX HOUSING WAS SENT FOR REPAIR 11-30-94 AND WAS RETURNED ON 9-19-95 WITH A SERVICEABILITY TAG AND THE WORK REQUESTED WAS NOT COMPLETED. IT WAS ONE-HALF FINISHED AND COULD NOT BE INSTALLED IN ITS CURRENT CONDITION. REASON IT WAS SENT, WAS FOR EXCESSIVE CSep 22, 1995 · N460H · Bolkms BK117B1SDR 95ZZZX6244Seal · leakingINSTALLED NEW SEAL AND WEAR SLEEVE FOR REPAIR LEAK AT INPUT SEAL. NEW SEAL IS LEAKING AGAIN AFTER VERY SHORT TIME IN SERVICE. A COMMON PROBLEM, BUT NOT SO SOON. INSPECTION INTERVAL FOR GEARBOX IS 3,000 HOURS. CHANGING SEAL 10 TIMES NOT DESIRABLE. SEAL IS Sep 22, 1995 · N167BH · Bell 206BSDR 95ZZZX6209Seal · leakingINSTALLED NEW SEAL AND REVERSED WEAR SLEEVE TO FRESH RUNNING SURFACE TO REPAIR LEAK AT INPUT SEAL. NEW SEAL IS LEAKING AGAIN AFTER VERY SHORT TIME IN SERVICE. A COMMON PROBLEM, BUT NOT AFTER SO LITTLE TIME. INSPECTION INTERVAL FOR GEARBOX IS 3,000 HRS. CHASep 22, 1995 · N161BH · Bell 206BSDR TEIL959Seal · deteriorationAFTER ONLY 30 HOURS OF OPERATION WITH NEW STYLE SEAL, SEAL BEGAN TO DETERIORATE AROUND OUTPUT SHAFT SEALING SURFACE INTO OIL CAUSING OIL COLOR TO CHANGE TO BLACK. ACCUMULATION OF RUBBER SEAL MATERIAL ON CHIP PLUG DETECTOR FACE CAUSED CHIP PLUG DETECTOR TO BECOSep 18, 1995 · N3528T · Bell 206BSDR HEEA955593Gear Box · defectiveCOUPLING BACKLASH TOO HIGH. NOTE: PIN DIM IN CR&O CHAPTER 65.20-07 PAGE 33 PARAGRAPH #3B IS INCORRECT. GEARBOX REMOVED DUE TO THIS ERROR. REPAIRED GEARBOX.Aug 17, 1995 · N3897N · Bell 214STSDR HEEA955352Spacer · defectiveSEAL LEAKING. REPLACED WITH NEW SPACER AND RETURNED TO SERVICE.Jul 11, 1995 · N7077B · Bell 206LSDR 96ZZZX993Gearbox · defectiveHIGH FREQUENCY VIBRATION AND UNABLE TO BALANCE T/R ASSY WHEN INSTALLED ON GEARBOX.Jun 20, 1995 · N727H · Bell 206L3SDR HEEA955161Gear Box · making metalGEAR BOX MAKING METAL.Jun 13, 1995 · N60951 · Snias AS350B2SDR 95ZZZX3353Seal · leakTAIL ROTOR GEARBOX REMOVED FROM AIRCRAFT DUE TO LEAKING INPUT SEAL. SEAL MATERIALS APPEAR NORMAL. NO APPARENT DEFECTS. THIS IS A NEW-TYPE SEAL. THIS IS THE SECOND TIME THIS NEW-TYPE SEAL HAS LEAKED A SHORT TIME AFTER INSTALLATION.Jun 13, 1995 · N362AL · Bell 206L3SDR 95ZZZX3108Bearing · damagedDAMAGED ROLLERS (5 PLACES) ON ROLLER BEARING.May 30, 1995 · N626MB · Bolkms BK117A3SDR HEEA955089Output Gear · wornWORN SPLINES. REPLACED WITH SERVICEABLE PART.May 25, 1995 · N5426U · Skrsky S76ASDR HEEA955088Flange · worn splinesWORN SPLINES. REPLACED WITH SERVICEABLE PART.May 25, 1995 · N5426U · Skrsky S76ASDR F6LM9598Hinge Laminate · tornTORN BEYOND LIMITS, (LOW LIFE ON THIS PART, SUBMITTER SUGGESTS DUE TO THE HEAT FROM THE EXHAUST.) REPLACED BEARINGSMay 17, 1995 · N6095T · Snias AS350B2SDR LJER950516Gearbox · under torqueTAIL ROTOR GEARBOX OUTPUT SHAFT RETAINING NUT, PN MS1414526, WAS FOUND SLIPPING AND UNDERTORQUED. DURING 100-HOUR INSPECTION, TAIL ROTOR BLADE ROTATION NOTED MOVING MORE THAN NORMAL GEAR BACKLASH. TEAR DOWN OF THE T/R GEARBOX REVEALED NUT TORQUED TO 75 INCHEMay 16, 1995 · N511TT · Robsin R22ALPHASDR 95ZZZX3916Seal · leaksSEAL WORN BEYOND LIMITS. LEAKS BAD.May 16, 1995 · N972BH · Snias AS350B2SDR HEEA954976Gearbox · leakingREPAIR DUE TO SEALS LEAKING.May 12, 1995 · N230UN · Bell 230SDR HEEA954973Fitting · crackedHAIRLINE CRACK ON INSIDE CASTING NEAR L/H UPPER MOUNT HOLE.May 11, 1995 · N132AE · Bolkms BK117B2SDR GJQA9520870Seal · leakingT/R GEARBOX INPUT SEAL LEAKING, ALSO USED 1 EACH M8348/1-230May 5, 1995 · N404W · Bell 206L4SDR 95ZZZX3914Ball Joint · wornBALL JOINT HAS EXCESSIVE AXIAL PLAY IN BEARING.May 3, 1995 · N972BH · Snias AS350B2SDR HEED95197Plug · seal leakingT/R GEARBOX INPUT SEAL LEAKING. ORDER NEWApr 26, 1995 · N236X · Bell 230SDR HEED95195Seal · leakingT/R GEARBOX INPUT SEAL LEAKING. ORDER NEWApr 26, 1995 · N236X · Bell 230SDR EGRA9541Shaft Seal · leakingOIL SEEPING FROM VERTICAL FIN. REMOVED IGB FROM AIRCRAFT, REPLACED INPUT SEAL.Apr 26, 1995 · N116MB · Bolkms BK117A3SDR HEED9575Seal · leakingT/R GEARBOX INPUT SEAL LEAKING. ORDER NEW.Apr 24, 1995 · N236X · Bell 230
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