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 HEEA968389Pitch 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 HEEA0008390 FOR INFORMATION.Oct 18, 1996 · N3911L · Bell 412SDR HEEA968388Pitch Horn · defectiveHOLE FOR SAFETY OF CHORDWISE WEIGHTS LOCATED IN WRONG PLACE. UNABLE TO SAFETY WITH REQUIRED WASHERS. ALSO REPLACED PITCH LINKS. SEE MMIR# HEEA0008389 AND HEEA0008390 FOR INFORMATION. S/N A9 A11Oct 18, 1996 · N3911L · Bell 412SDR 97ZZZX734Actuator · defectiveDAMPNER ACTUATOR INSPECT FOR BREAKAWAY TORQUE TOLERANCE. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Oct 15, 1996 · N901CF · Doug MD900SDR 97ZZZX733Actuator · faultyDAMPNER ACTUATOR FAILED BREAKAWAY TORQUE TOLERANCE INSPECTION. REPLACED WITH NEW UNIT, CORRECTED PROBLEM.Oct 15, 1996 · N901CF · Doug MD900SDR HEEA968275Cable Assembly · mis mfgCABLE 1/2 INCH TOO SHORT WHEN MEASURED AGAINST OLD T/R CABLE. WHEN INSTALLED IN AIRCRAFT EXPOSED THREAD ON TURNBUCKLE OUT OF LIMITS WITH CORRECT CABLE TENSION.Oct 14, 1996 · N1545X · Skrsky S76ASDR 96ZZZX5760Pitch Link · bearing playPLAY IN BEARINGS, 2 EA PITCH LINK ASSY.Oct 7, 1996 · N317MC · Bolkms BK117C1SDR 96ZZZX5755Bellcrank · bearing wornT/R BELLCRANK BEARINGS WORN.Oct 7, 1996 · N317MC · Bolkms BK117C1SDR 96ZZZX5694Actuator · leakingACTUATOR EXCESSIVE LEAKAGE.Sep 20, 1996 · N117M · Bolkms BK117A1SDR HEEA967791Pedal Assy · worn excessPART IS WORN EXCESSIVELY. (BEARING WORN BEYOND LIMITS) REPLACED WITH SERVICEABLE PEDAL ASSEMBLY.Sep 9, 1996 · N2133X · Bell 206L1SDR HEEA967790Support Assy · corrodedPART IS CORRODED. (CORROSION AROUND BASE OF PEDAL SUPPORT) REPLACED WITH SERVICEABLE PART.Sep 9, 1996 · N3904L · Bell 206L1SDR 97ZZZX670Bearing · wornTHRUST BEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH 3 EACH NEW UNITS, CORRECTED PROBLEM.Aug 3, 1996 · N901CF · Doug MD900SDR 96ZZZX4646Actuator · leaksACTUATOR LEAKS.Jul 15, 1996 · N117LF · Bolkms BK117A1SDR 97ZZZX671Bearing · wornTHRUST BEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH 4 EACH NEW UNITS, CORRECTED PROBLEM.Jul 1, 1996 · N901CF · Doug MD900SDR 96ZZZX4666Pitch Link · bearing playTAIL ROTOR CONTROL PLAY IN BEARINGS (2 EACH).Jun 7, 1996 · N317MC · Bolkms BK117C1SDR HEEA967312Control Rod · corrodedROD IS CORRODED. (CORROSION FOUND UNDERNEATH BLACK HEAT SHRINK. REPLACED WITH SERVICEABLE CONTROL TUBE.Jun 4, 1996 · N5421E · Bolkms BO105SSDR 96ZZZX3158Bearing · looseDURING ROUTINE INSPECTION OF AD 94-24-04, THE DUPLEX BEARING WAS LOOSE (AXIALLY) INSIDE OF PITCH CONTROL HOUSING (369A1802) - THE ENTIRE BEARING INCLUDING THE OUTER HOUSING OF THE BEARING. THIS COULD ALLOW THE BEARING TO SPIN INSIDE THE HOUSING. SUBMITTER STMay 21, 1996 · N911FT · Hughes 369DSDR ERAA96238Control Rod · corrodedTUBE HAS METAL BLISTER ON INSIDE. POSSIBLE CORROSION .May 13, 1996 · Bolkms BO105SSDR HEEA967224Servo Assy · defectiveSERVO KICKING IN FLIGHT.May 9, 1996 · N2261D · Bell 412SDR 96ZZZX3140Bearing · flat spotsTHRUST BEARING HAS FLAT SPOTS. REPLACED WITH 6 EACH NEW UNITS, CORRECTED PROBLEM.May 1, 1996 · N901CF · Doug MD900SDR 96ZZZX3183Bell Crank · wornBEARING WORN AND STIFF. REMOVED AND REPLACED.Apr 12, 1996 · N317MC · Bolkms BK117C1SDR 96ZZZX2585Control Cable · bindingPILOT EXPERIENCED BINDING IN T/R PEDALS AND MADE A PRECAUTIONARY RUNNING LANDING. INSPECTION FOUND BINDING IN TELEFLEX CONTROL CABLE. CABLE WAS REPLACED.Apr 11, 1996 · N216LA · Snias AS350B1SDR 96ZZZX2789Control Cable · frayedINFORMATION APPLICABLE TO MODELS, F28C, F28C-2 F28-F, 280F, 280FX. INSPECTION FOUND TAIL ROTOR CABLES FRAYED WHERE THEY PASS OVER THE AFT ALIGNMENT PULLEYS IN THE TAIL CONE. PULLEYS WERE LUBED, FREE AND TURNING. SUSPECT VIBRATION WAS CAUSING CABLES TO RATTLApr 1, 1996 · N8627J · Enstrm F28FSDR 96ZZZX3139Bearing · wornTHRUST BEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH 2 EACH NEW UNITS, CORRECTED PROBLEM.Mar 21, 1996 · N901CF · Doug MD900SDR 96ZZZX3138Bearing · wornTHRUST BEARING WORN BEYOND SERVICEABLE LIMITS. REPLACED WITH 2 EACH NEW UNITS, CORRECTED PROBLEM.Mar 21, 1996 · N901CF · Doug MD900SDR HEEA966724Pitch Links · wornPITCH LINK BEARINGS WORN.Feb 26, 1996 · N230UN · Bell 230SDR HEEA966722Link · worn excessLINK IS WORN EXCESSIVELY. (SPHERICAL BEARINGS WORN)Feb 26, 1996 · N230UN · Bell 230SDR HEEA966688Actuator Assy · defectiveSAS YAW CHANNEL WOULD NOT COME ON LINE UNTIL ACTUATOR LOCK WAS PUSHED INTO OPEN POSITION. WITH ACTUATOR INSTALLED IN AIRCRAFT, LOCK SOLENOID WOULD NOT OPEN LOCK WITHOUT BEING PUSHED. LOCK WOULD STAY OPEN ONCE IT WAS PUSHED THERE.Feb 12, 1996 · N8045T · Bell 214STSDR HEEA966574Connecting Link · crackedTAIL ROTOR P/C LINK IS CRACKED ON BOTH ENDS WHERE BEARINGS PRESSED INTO LINK. REPLACED P/C LINK WITH SERVICEABLE PART.Jan 31, 1996 · N3181J · Bell 206BSDR AU960065Bearing · seized(AUS) TAIL ROTOR CONTROL BARREL BEARING SEIZED - BEARINGS ARE SEALED UNITSJan 19, 1996 · Bell 47G3BSDR HEEA966422Servo · leakingLEAKING AT PILOT VALVE AND BOTH ENDS OF CYLINDER ALSO OUT OF TIMING. SENT TO AMERICAN EUROCOPTER CORP. ..THEIR PROPERTY BEING RETURNED. (PHI REQUESTS FOR CREDIT)Jan 11, 1996 · N5797X · Aerosp AS355F1SDR HEEA966414Rod Bearing · wornBEARING WORN. REPLACED WITH SERVICEABLE T/R P/C LINK.Jan 11, 1996 · N60951 · Snias AS350B2SDR HEED95444Link · defectiveT/R LINK DEFECTIVE. REPLACED UNITDec 13, 1995 · N236X · Bell 230SDR CA951218005Link · rough bearing(CAN)DURING INSPECTION FOR ABNORMAL NOISE, THE T/R PITCH CONTROL BEARING WAS FOUND TO BE ROUGH.Dec 13, 1995 · Hughes 369DSDR 96ZZZX300Pitch Horn · loose studDURING DAILY INSPECTION, FOUND THE PITCH LINK STUD ON THE PITCH HORN WAS LOOSE. SUSPECT CAUSE IS THE STUD WAS NOT PERMANENTLY SECURED AT THE FACTORY. ALSO, THE PITCH HORN WAS NOT PROPERLY TORQUED AT THE FACTORY CAUSING THE PITCH HORN TO BECOME LOOSE ON THE TDec 13, 1995 · N175AL · Bell 206L4SDR CA951218003Pitch Change · dry req lube(CAN)TIME EXPIRED FOR REGREASE, COMPONENT APPEARS TO HAVE NO GREASE LEFT IN ASSEMBLY. TIME THIS INSTALLATION 23 MONTHS.Dec 11, 1995 · Hughes 369DSDR 96ZZZX440Bellcrank · wornTEFLON COATING WORN BEYOND LIMITS IN T/R BELLCRANK. REMOVED AND REPLACED.Dec 8, 1995 · N214AE · Bolkms BK117B1SDR CA951130008Control Tube · bearing loose(CAN)SPHERICAL BEARING FOUND LOOSE IN CONTROL TUBE.Nov 27, 1995 · Snias AS350BSDR CA951215201Bracket · cracked(CAN)TAIL ROTOR PEDAL BRACKET BROKE AWAY FROM AIRFRAME. PILOT PERFORMING PRE-FLIGHT CONTROL CHECK.Nov 17, 1995 · Hughes 369DSDR 96ZZZX444Bellcrank · wornTEFLON COATED BEARING WORN ON T/R BELLCRANK. REMOVED AND REPLACED.Nov 11, 1995 · N317MC · Bolkms BK117C1SDR 95ZZZX6621Rod · wornON 100-HOUR INSPECTION, LOOSENESS OF BEARING WAS FOUND. CAUSE - NORMAL WEAR.Nov 9, 1995 · N842BP · Snias AS350BSDR 95ZZZX6530Rod · wornDURING 100-HOUR INSPECTION, LOOSENESS OF BEARING WAS FOUND. SUSPECTED CAUSE, NORMAL WEAR.Nov 9, 1995 · N842BP · Snias AS350BSDR HEED95387Link · bearing wornBEARING WORN TO EXXON LIMITS .REPLACED UNITNov 3, 1995 · N236X · Bell 230SDR 95ZZZX7055Pitch Link · crackedFOUND CRACK ON OUTBOARD PITCH CHANGE LINK NEXT TO BEARING. SUBMITTER STATED PART WAS NEW FROM BELL, PROBLEM MAY BE FROM OVERSTAKING OF BEARING AT ASSEMBLY.Oct 26, 1995 · N333PJ · Bell 206BSDR 95ZZZX7000Bellcrank · clevis wornT/R BELLCRANK INPUT CLEVIS WORN PAST LIMITS.Oct 18, 1995 · N32GA · Snias AS350BSDR HEEA955895Pitch Links · bearing wornT/R P/C LINKS BEARINGS WORN BEYOND LIMITS.Oct 17, 1995 · N230UN · Bell 230SDR HEEA955889Yaw Control · defectiveYAW ACTUATOR DEFLECTS LEFT, WILL NOT ENTER.Oct 13, 1995 · N22608 · Bell 412SDR 95ZZZX6488Actuator · leakingLEAKING TAIL ROTOR ACTUATOR.Oct 12, 1995 · N117UC · Bolkms BK117A3SDR 95ZZZX5712Control Tube · chafedTAIL ROTOR PITCH ACTUATOR CONTROL TUBE HAS STARTED GETTING WEAR DOWN BELOW THE PAINT AS IT PASSES THROUGH THE BULKHEAD. OPENED UP THE LIGHTNING HOLE TO ALLOW SUFFICIENT CONTROL TUBE CLEARANCE.Sep 18, 1995 · N911NM · Bell 222USDR HEEA955767Bearing · wornBEARING HAS EXCESSIVE AXIAL WEAR (.4MM MAX) REPLACED WITH SERVICEABLE T/R P/C LINK.Sep 14, 1995 · N5418A · Bolkms BO105SSDR CA950912019Bearing · cracked(CAN)DURING FACTORY ACCEPTANCE THE PILOT/OWNER REPORTED THAT THE FORCE REQUIRED FOR FLAPPING THE TAIL ROTOR WAS EXCESSIVE. COMPANY FLIGHT TEST RESPONDED THAT THIS WAS NORMAL FOR A NEW AIRCRAFT. DURING THE IMPORT INSPECTION THE FLAPPING BEARING INNER RACE WAS Aug 31, 1995 · Robsin R44
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