JASC 6720

Service difficulty reports · 852

Reports filed under 6720 · Tail Rotor Control System, 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 = '6720'
  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 AU970709Pitch Control · faulty(AUS) TAIL ROTOR PITCH CHANGE ASSEMBLY FAULTY - ASSEMBLY WAS REFITTED AT THE 2000 HOURLY SERVICING WITH NO WORK RELEASE ORDER OR RELEASE NUMBER SHOWING IT TO BE OVERHAULED BY ROBINSON HELICOPTER - PERSONNEL/MAINTENANCE ERROR - UNAPPROVED PARTMay 15, 1997 · Robsin R22BETASDR HAIHEEA9773Pitch Link · defectivePITCH LINK RIVETED ROD END IS THREADED ON TOO FAR. NOT ENOUGH THREADS REMAIN FOR ADJUSTMENTS TO BE PERFORMED AT ADJUSTABLE ROD END.May 5, 1997 · Bell 212SDR HAIHEEA9769Tube Assy · corrodedCORROSION ON CONTROL TUBE BEYOND LIMITS. SEVERAL AREAS HAD CORROSION. REPLACED WITH SERVICEABLE CONTROL ASSEMBLY.Apr 30, 1997 · N22743 · Bell 206BSDR HAIHEEA9727Actuator Assy · bearing wornBEARING WORN.Apr 30, 1997 · N3897N · Bell 214STSDR HAIHEEA9697Actuator · leakingT/R ACTUATOR LEAKING.Apr 30, 1997 · N132AE · Bolkms BK117B2SDR 97ZZZX4126Bearing · wornTHRUSTER BUILD-UP ASSEMBLY CONTROL BEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH 4 EACH NEW UNITS, CORRECTED PROBLEM.Apr 28, 1997 · N901CF · Doug MD900SDR HAIHEEA9420Rod · wornPITCH CONTROL ROD WEAR AND VIBRATION ABOVE 2IPS.Apr 16, 1997 · N4000L · Snias AS350B2SDR HAIHEEA9369Actuator · leakACTUATOR LEAK BETWEEN ELECTRO MECHANICAL ACTUATOR AND HYDRAULIC SERVO BODY.Apr 16, 1997 · N401PH · Bolkms BK117A3SDR 97ZZZX3201Mount · crackedAFT TRANSMISSION MOUNT CRACKED FROM RIVET, OUTWARD THROUGH EXTRUSION WEB AT UPPER LEFT MOUNT, PN 500N3139, STA 137.50 BULKHEAD.Apr 3, 1997 · N522FB · Hughes 500NSDR 97ZZZX2296Link · bearing lock upOPERATOR REPORTS LINK BEARING ASSY HAS LIMITED LIFE DUE TO LOCKING UP OF BEARINGS CAUSES PILOT TO HAVE ERRATIC PEDAL CONTROL HARD PEDALS, CAM, OVERSCARRING OF CLEVIS AT GEARING. AT PRESENT, NO GREASING PER MDHC. S/N'S NOTED LN001 THROUGH LN007.Apr 2, 1997 · Hughes 500NSDR HAIHEEA9308Yaw Control · failedACTUATOR FULLY EXTEND WILL NOT RETRACT.Apr 1, 1997 · N2014K · Bell 412SDR HAIHEEA9302Actuator · leakingT/R ACTUATOR LEAKING FLUID. (NOT WITHIN LIMITS)Apr 1, 1997 · N217UC · Bolkms BK117B1SDR HAIHEEA9298Rod Bearing · crackedPITCH CONTROL ROD CRACKED END BEARINGS.Apr 1, 1997 · N5793Z · Aerosp AS355F1SDR 97ZZZX1669Bearing · failedTAIL ROTOR PITCH CHANGE LINKS WERE INSTALLED AT 13,300.8 AIRCRAFT HOURS. AT 13,432 AIRCRAFT HOURS, ONE PITCH CHANGE LINK FAILED AT ONE END. THE BEARING APPEARS TO HAVE BEEN EXCESSIVELY OVER ROLL STAKED UPON INSTALLATION INTO THE LINK BEARING HOUSING. FAILURMar 24, 1997 · N8388F · Hughes 369HSSDR HAIHEEA9242Link Assembly · bearing failedRIVETED (NON-ADJUSTABLE) BEARING STIFF AND ROUGH. THIS BEARING ATTACHED TO THE PITCH CHANGE BELLCRANK BELOW THE TAIL ROTOR GEARBOX- REF. 407 IPC A667-15. THIS PROBLEM COULD BE RELATED TO THE TAIL ROTOR GEARBOX BREATHER TUBE VENTING ABOVE THELOCATION OF THIS Mar 21, 1997 · N407PH · Bell 407SDR HAIHEEA9228Rod · wornBEARINGS WORN.Mar 21, 1997 · N6100R · Snias AS350B2SDR 97ZZZX2472Bearing · seizedTHRUSTER BUILD-UP ASSEMBLY SEIZED. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. CORES RETURNED TO MDHS FROM RNO.Mar 15, 1997 · N901CF · Doug MD900SDR 97ZZZX2470Rotating Cone · wornTHRUSTER BUILD-UP INSTALLATION. WORN RING. REPLACED WITH USED UNIT, CORRECTED PROBLEM. CORES RETURNED TO MDHS FROM RNO.Mar 15, 1997 · N901CF · Doug MD900SDR 97ZZZX2468Pulley · groovedTHRUSTER BUILD-UP ASSEMBLY PULLEY UNIT EXCESSIVELY GROOVED. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. CORES RETURNED TO MDHS FROM RNO.Mar 15, 1997 · N901CF · Doug MD900SDR 97ZZZX2467Sector Assy · stiffTHRUSTER BUILD-UP ASSEMBLY SECTOR STIFF. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. CORES RETURNED TO MDHS FROM RNO.Mar 15, 1997 · N901CF · Doug MD900SDR AU970229Support · cracked(AUS) TAIL ROTOR CONTROL PEDAL CENTRE SUPPORT CRACKED AT THE UPPER SUPPORT TUBE WELDED JOINTMar 14, 1997 · Skrsky S76ASDR 97ZZZX1991Grip · defectiveBUSHING FOR PITCH LINK DOES NOT PROTRUDE FLUSH ON BACK SIDE OF GRIP EAR. THEREFORE, SINGLE STEEL WASHER UNDER NUT OF PC LINK BOLT SITS OVER RECESS AND CAN 'DISH' INTO RECESS CAUSING BOLT TO LOOSE TORQUE. PC LINK CONTACTED GRIP EAR AS LOOSE BOLT MOVED.Mar 13, 1997 · N22753 · Bell UH1BSDR 97ZZZX2471Diverter Plate · wornINSTALL, NOTAR (R) DIFFUSER - STATOR. REPLACED SEVERAL FAN BLADES. REINSTALLED FAN ASSY. WHILE PERFORMING A PEDAL CHECK, FOUND PITCH CONTROL BELLCRANK ROCKING INSIDE THE DIVERTER PLATE. FURTHER INVESTIGATION FOUND THE BUSHINGS ARE TOO LOOSE WITHIN THE DIVEMar 7, 1997 · N901CF · Doug MD900SDR 97ZZZX2466Blade Assy · defectiveFAN ASSEMBLY, NOTAR (R). WHILE PERFORMING FAN HUB WEIGHT CHANGE, FOUND SEVERAL FAN BLADES WITH SIDEWALL DEFECT OR PROTRUSION. ALSO, FOUND THE FAN DIVERTER PLATE BELLCRANK HAD ELONGATED HOLES. INNER BELLCRANK WAS LOOSE. REPLACED WITH NEW UNIT, CORRECTED PROMar 7, 1997 · N901CF · Doug MD900SDR 97ZZZX2465Blade · damagedFAN ASSEMBLY, NOTAR (R), BLADE DAMAGED. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Mar 7, 1997 · N901CF · Doug MD900SDR 97ZZZX2464Blade Assy · defectiveFAN ASSEMBLY, NOTAR (R). WHILE PERFORMING FAN HUB WEIGHT CHANGE, FOUND SEVERAL FAN BLADES WITH SIDEWALL DEFECT OR PROTRUSION. ALSO, FOUND THE FAN DIVERTER PLATE BELLCRANK HAD ELONGATED HOLES. INNER BELLCRANK WAS LOOSE. REPLACED WITH NEW UNIT, CORRECTED PROMar 7, 1997 · N901CF · Doug MD900SDR 97ZZZX2463Blade Assy · defectiveFAN ASSEMBLY, NOTAR (R). WHILE PERFORMING FAN HUB WEIGHT CHANGE, FOUND SEVERAL FAN BLADES WITH SIDEWALL DEFECT OR PROTRUSION. ALSO, FOUND THE FAN DIVERTER PLATE BELLCRANK HAD ELONGATED HOLES. INNER BELLCRANK WAS LOOSE. REPLACED WITH NEW UNIT, CORRECTED PROMar 7, 1997 · N901CF · Doug MD900SDR 97ZZZX2462Blade Assy · defectiveFAN ASSEMBLY, NOTAR (R). WHILE PERFORMING FAN HUB WEIGHT CHANGE, FOUND SEVERAL FAN BLADES WITH SIDEWALL DEFECT OR PROTRUSION. ALSO, FOUND THE FAN DIVERTER PLATE BELLCRANK HAD ELONGATED HOLES. INNER BELLCRANK WAS LOOSE.Mar 7, 1997 · N901CF · Doug MD900SDR 97ZZZX2461Bellcrank · wornINSTALLATION, NOTAR (R) FAN CONTROL WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Mar 7, 1997 · N901CF · Doug MD900SDR CA970327021Pitch Change Rod · corroded(CAN) ELASTOMER BUSHINGS IN TAIL ROTOR PITCH CHANGE ROD END FOUND CORRODED, CRACKED, AND DELAMINATED.Mar 6, 1997 · Snias AS350BSDR 97ZZZX2294Pitch Link · crackedDURING PRE-FLIGHT INSPECTION, A CRACK WAS FOUND ON THE TAIL ROTOR PITCH CHANGE LINK ADJACENT TO THE BEARING. SUSPECT CAUSE MAY HAVE BEEN DUE TO OUT OF BALANCE TAIL ROTOR ASSEMBLY.Mar 4, 1997 · N73MM · Bell 206L1SDR HEEA979145Link · wornLINK BEARINGS WORN. SERIAL NUMBERS REMOVED ARE NHFS2129 AND NHFS2050. SERIAL NUMBERS FOR REPLACEMENTS ARE NHFS2451 AND NHFS2586.Feb 25, 1997 · N407PH · Bell 407SDR HEEA978932Pc Link · bearing wornPC LINK OUTBOARD BEARING WORN.Jan 23, 1997 · N230UN · Bell 230SDR 97ZZZX1656Pitch Link · wornBEARINGS WORN. REPLACED 2 EACH PITCH LINKS.Jan 22, 1997 · N4UV · Bell 230SDR HEEA978896Link · wornWORN BEARING.Jan 17, 1997 · N230UN · Bell 230SDR CA970212001Hose · loose(CAN) PILOT FELT AN OBSTRUCTION WHEN MOVING THE TAIL ROTOR DURING LANDING. INSPECTION FOUND THAT THE HEATER HOSE WAS RUBBING ON THE LOWER FORWARD BELLCRANK (P/N C317-2). THE HOSE LAYS ALONGSIDE THE BELLCRANK AND CAME IN CONTACT WITH A CONTROL TUBE BOLT.Jan 14, 1997 · Robsin R44SDR 97ZZZX402Control Cable · mismanufacturedWHILE ATTEMPTING TO INSTALL A NEW TAIL ROTOR CABLE, THE TECHNICIAN DISCOVERED THAT THE THREADED 'MALE' END OF THE CABLE WAS THREADED IMPROPERLY. THE CABLE WAS THREADED WITH LEFT-HAND THREADS INSTEAD OF THE REQUIRED RIGHT-HAND THREADS. THE OPERATOR FOUND NINEJan 8, 1997 · Skrsky S76ASDR 97ZZZX2473Fan Assy · damagedFAN ASSEMBLY, NOTAR (R). DAMAGED AROUND BLADE CUFF. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Jan 1, 1997 · N901CF · Doug MD900SDR 97ZZZX2325Bearing · notchedT/R CONTROL BEARING NOTCHED. OCCURRENCE DATE IS 12-19-96. REPALCED WITH 6 EACH UNITS, CORRECTED PROBLEM.Jan 1, 1997 · N901CF · Doug MD900SDR HEEA968785Rod · wornPITCH CONTROL ROD WORN BEARING.Dec 27, 1996 · N350BZ · Snias AS350B2SDR 97ZZZX1335Actuator · defectiveON TEST FLIGHT AFTER INSTALLATION OF ACTUATOR, THE T/R PEDAL WAS STIFF IN LEFT FORWARD QUADRANT.Dec 23, 1996 · N214AE · Bolkms BK117B1SDR 97ZZZX1337Actuator · leakingLEAKING ACTUATOR.Dec 12, 1996 · N317MC · Bolkms BK117C1SDR 97ZZZX405Support · corrodedDURING REPAIR IN LANDING LIGHT BAY AREA, MECHANIC NOTED BELLCRANK SUPPORT P/N 206-030-111-3 EXCESSIVELY CORRODED. REPLACED BELLCRANK AND SUPPORT P/N 206-030-111-003.Dec 10, 1996 · N83086 · Bell 206BSDR HEEA968609Rod · wornPITCH CONTROL ROD IS WORN EXCESSIVELY. (WORN SPHERICAL BEARINGS) SERIAL NUMBERS REMOVED PMA8787 AND PMA8784.Dec 4, 1996 · N6100R · Snias AS350B2SDR HEEA968608Rod · wornPITCH CONTROL ROD IS WORN EXCESSIVELY. (WORN SPHERICAL BEARINGS)Dec 4, 1996 · N6097Z · Snias AS350B2SDR CA961216011Control Tube · chafed(CAN) CLAMP ON PITOT STATIC TUBE CHAFED A HOLE IN TAIL ROTOR CONTROL TUBE.Dec 4, 1996 · Aerosp SA316BSDR MVH0064233Lobe · wornLOBES WORN ON TAIL ROTOR PITCH.Nov 11, 1996 · N63CF · Aerosp SA365NSDR 97ZZZX725Thrust Bearing · wornTHRUST BEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH 3 EACH NEW UNITS, CORRECTED PROBLEM.Oct 22, 1996 · N901CF · Doug MD900SDR HEEA968393Rod · wornBOTH T/R P/C LINKS WORN.Oct 18, 1996 · N60951 · Snias AS350B2SDR HEEA968390Pitch Link · defectiveHOLE FOR SAFETY OF CHORDWISE WEIGHTS LOCATED IN WRONG PLACE. UNABLE TO SAFETY WITH REQUIRED WASHERS. ALSO REPLACED PITCH HORNS. SEE MMIR# HEEA0008388 AND HEEA0008389 FOR INFORMATION.Oct 18, 1996 · N3911L · Bell 412
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