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.
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
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 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 PARTSDR 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.SDR HAIHEEA9769Tube Assy · corrodedCORROSION ON CONTROL TUBE BEYOND LIMITS. SEVERAL AREAS HAD CORROSION. REPLACED WITH SERVICEABLE CONTROL ASSEMBLY.SDR HAIHEEA9727Actuator Assy · bearing wornBEARING WORN.SDR HAIHEEA9697Actuator · leakingT/R ACTUATOR LEAKING.SDR 97ZZZX4126Bearing · wornTHRUSTER BUILD-UP ASSEMBLY CONTROL BEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH 4 EACH NEW UNITS, CORRECTED PROBLEM.SDR HAIHEEA9420Rod · wornPITCH CONTROL ROD WEAR AND VIBRATION ABOVE 2IPS.SDR HAIHEEA9369Actuator · leakACTUATOR LEAK BETWEEN ELECTRO MECHANICAL ACTUATOR AND HYDRAULIC SERVO BODY.SDR 97ZZZX3201Mount · crackedAFT TRANSMISSION MOUNT CRACKED FROM RIVET, OUTWARD THROUGH EXTRUSION WEB AT UPPER LEFT MOUNT, PN 500N3139, STA 137.50 BULKHEAD.SDR 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.SDR HAIHEEA9308Yaw Control · failedACTUATOR FULLY EXTEND WILL NOT RETRACT.SDR HAIHEEA9302Actuator · leakingT/R ACTUATOR LEAKING FLUID. (NOT WITHIN LIMITS)SDR HAIHEEA9298Rod Bearing · crackedPITCH CONTROL ROD CRACKED END BEARINGS.SDR 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. FAILURSDR 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 SDR HAIHEEA9228Rod · wornBEARINGS WORN.SDR 97ZZZX2472Bearing · seizedTHRUSTER BUILD-UP ASSEMBLY SEIZED. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. CORES RETURNED TO MDHS FROM RNO.SDR 97ZZZX2470Rotating Cone · wornTHRUSTER BUILD-UP INSTALLATION. WORN RING. REPLACED WITH USED UNIT, CORRECTED PROBLEM. CORES RETURNED TO MDHS FROM RNO.SDR 97ZZZX2468Pulley · groovedTHRUSTER BUILD-UP ASSEMBLY PULLEY UNIT EXCESSIVELY GROOVED. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. CORES RETURNED TO MDHS FROM RNO.SDR 97ZZZX2467Sector Assy · stiffTHRUSTER BUILD-UP ASSEMBLY SECTOR STIFF. REPLACED WITH NEW UNIT, CORRECTED PROBLEM. CORES RETURNED TO MDHS FROM RNO.SDR AU970229Support · cracked(AUS) TAIL ROTOR CONTROL PEDAL CENTRE SUPPORT CRACKED AT THE UPPER SUPPORT TUBE WELDED JOINTSDR 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.SDR 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 DIVESDR 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 PROSDR 97ZZZX2465Blade · damagedFAN ASSEMBLY, NOTAR (R), BLADE DAMAGED. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.SDR 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 PROSDR 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 PROSDR 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.SDR 97ZZZX2461Bellcrank · wornINSTALLATION, NOTAR (R) FAN CONTROL WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.SDR CA970327021Pitch Change Rod · corroded(CAN) ELASTOMER BUSHINGS IN TAIL ROTOR PITCH CHANGE ROD END FOUND CORRODED, CRACKED, AND DELAMINATED.SDR 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.SDR HEEA979145Link · wornLINK BEARINGS WORN. SERIAL NUMBERS REMOVED ARE NHFS2129 AND NHFS2050. SERIAL NUMBERS FOR REPLACEMENTS ARE NHFS2451 AND NHFS2586.SDR HEEA978932Pc Link · bearing wornPC LINK OUTBOARD BEARING WORN.SDR 97ZZZX1656Pitch Link · wornBEARINGS WORN. REPLACED 2 EACH PITCH LINKS.SDR HEEA978896Link · wornWORN BEARING.SDR 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.SDR 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 NINESDR 97ZZZX2473Fan Assy · damagedFAN ASSEMBLY, NOTAR (R). DAMAGED AROUND BLADE CUFF. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.SDR 97ZZZX2325Bearing · notchedT/R CONTROL BEARING NOTCHED. OCCURRENCE DATE IS 12-19-96. REPALCED WITH 6 EACH UNITS, CORRECTED PROBLEM.SDR HEEA968785Rod · wornPITCH CONTROL ROD WORN BEARING.SDR 97ZZZX1335Actuator · defectiveON TEST FLIGHT AFTER INSTALLATION OF ACTUATOR, THE T/R PEDAL WAS STIFF IN LEFT FORWARD QUADRANT.SDR 97ZZZX1337Actuator · leakingLEAKING ACTUATOR.SDR 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.SDR HEEA968609Rod · wornPITCH CONTROL ROD IS WORN EXCESSIVELY. (WORN SPHERICAL BEARINGS) SERIAL NUMBERS REMOVED PMA8787 AND PMA8784.SDR HEEA968608Rod · wornPITCH CONTROL ROD IS WORN EXCESSIVELY. (WORN SPHERICAL BEARINGS)SDR CA961216011Control Tube · chafed(CAN) CLAMP ON PITOT STATIC TUBE CHAFED A HOLE IN TAIL ROTOR CONTROL TUBE.SDR MVH0064233Lobe · wornLOBES WORN ON TAIL ROTOR PITCH.SDR 97ZZZX725Thrust Bearing · wornTHRUST BEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH 3 EACH NEW UNITS, CORRECTED PROBLEM.SDR HEEA968393Rod · wornBOTH T/R P/C LINKS WORN.SDR 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.
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