JASC 6240
Service difficulty reports · 676
Reports filed under 6240 · Main Rotor Indicating 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 = '6240' 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 = '6240' 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 QR9R2026091600001Sensor · intermittentLOW ROTOR RPM LT AND AUDIO INTERMITTENTLY ACTIVE WHILE HOVER TAXIING, ALL OTHER INDICATIONS WERE NORMAL. A TESTFLIGHT EVAL FOUND UPON LANDING ON THE PAD AND REDUCING COLLECTIVE, THE ROTOR RPM AUDIO AND LIGHT ILLUMINATED WITH ROTOR RPM AT 96.8%. WHEN INCREASINGSDR QR9R2026081800001Sensor · erraticROTOR RPM INDICATOR GAVE ERRATIC INDICATIONS FROM 101% TO 80% DURING FLIGHT. THE ROTOR LOW WARNING LIGHT INDICATION FLUCTUATED INTERMITTENTLY, NEVER STAYING ON. THE LOW ROTOR AUDIO NEVER SOUNDED OFF. REMOVED AND REPLACED THE SPEED PICKUP SENSOR IAW AMM 62-41-0SDR QR9R2026042000001Sensor · faultyAFTER STARTING ENGINE #2, INITIALLY NR APPEARED ON THE TRIPLE TACH AND MATCHED #2 N2, BUT THEN RETURNED TO 0. A BATTERY DISCONNECT/RESET DID NOT RESOLVE THE PROBLEM. REMOVED AND REPLACED SPEED PICK-UP SENSOR.SDR QR9R2025110300002Sensor · faultyRRPM GAUGE WOULD DROP TO ZERO INTERMITTENTLY IN FLIGHT WITH LOW RRPM AUDIO. ALL OTHER ENGINE INDICATORS WERE NORMAL. HAPPENED SEVERAL TIMES IN FLIGHT. A TEST FLIGHT EVAL FOUND ROTOR RPM WENT TO 0 WHEN INCREASING COLLECTIVE PRIOR TO TAKEOFF TWO TIMES. RPM ON TRSDR QR9R2025103000001Sensor · faultyTRIPLE TACH FAILED DURING START UP. NR FAILED TO SYNC, THEN WOULD DROP TO 0. AFTER SEVERAL SECONDS IT WOULD MATCH TO N2 AND THEN REVERT BACK TO ZERO. HAPPENED CONSISTENTLY 4 TIMES. REMOVED AND REPLACED SPEED PICK-UP SENSOR IAW AMM 62-41-00, 4-1. T/P MOC GOOD.SDR QR9R2025091700001Sensor · faultyROTOR TACH INTERMITTENT. TEST FLIGHT EVAL FOUND ROTOR TACH AND DIGITAL READOUT INTERMITTENT ON THE GROUND BUT WORKS FINE IN FLIGHT. THE ROTOR INDICATION DECREASES AND RETURNS TO NORMAL WHEN THE COLLECTIVE IS APPLIED ON THE GROUND. REMOVED AND REPLACED SPEED PISDR QR9R2025052900003Sensor · faultyAPPROXIMATELY ONE MINUTE AFTER FIRST ENGINE START, BOTH NR DISPLAYS (TRIPLE TACH AND VEMD SYSTEM PAGE) DROPPED TO INDICATING ZERO RPM. REMOVED AND REPLACED NR SPEED SENSOR IAW AMM 62-41-00, 4-1. MOC SUCCESSFULLY COMPLETED.SDR QR9R2025051600001Sensor · faultyFAULTY TRIPLE TACHOMETER NR INDICATION WITH TWIST GRIPS IN FLIGHT (INTERMITTENT 101 TO 0 INDICATIONS WITH W/U DISPLAY AND AUDIO). REMOVED AND REPLACED NR SENSOR IAW AMM 62-41-00, 41. MOC OK.SDR QR9R2025040900001Sensor · faultyLOW ROTOR RPM LIGHT ON THE WU WITH ASSOCIATED TONE CAME ON INADVERTANTLY 6 TIMES DURING A 30 MINUTE FLIGHT. DURING TROUBLESHOOTING OF MAIN ROTOR RPM SYSTEM, FOUND RPM MONITORING SYSTEM TO BE WORKING. RPM SENSOR IS AT FAULT. REMOVED AND REPLACED SPEED PICK-UP (SDR QR9R2024101600001Sensor · intermittentDURING FLIGHT, ROTOR RPM INDICATION DROPPED TO 0 THEN RETURNED TO NORMAL FOUR TIMES TOTAL. TROUBLESHOOTING FOUND THE MAIN ROTOR RPM SENSOR INDICATED INTERMITTENTLY. TRIPLE TACHOMETER INDICATOR FUNCTIONED NORMALLY ON SIGNAL GENERATOR. REMOVED AND REPLACED SPEEDSDR QR9R2024100800002Sensor · failedNR FAILURE ON TRIPLE TACH DURING FLIGHT RESULTING IN AN UNSCHEDULED LANDING. REMOVED AND REPLACED SPEED PICK-UP SENSOR IAW AMM 62-41-00, 4-1. T/P MOC COMPLETED IAW AMM 005-60-00, 6-12. CHECK FOUND GOOD.SDR QR9R2024080700001Pickup · failedDURING FLIGHT, TRIPLE TACH FAILED WHEN REDUCING TWIST GRIP FROM FLIGHT TO IDLE. A TEST FLIGHT EVAL REVEALED ROTOR INDICATION GOES TO ZERO BOTH ANALOG AND DIGITAL. ROTOR RPM SPEED PICK-UP FAILED INSPECTION IAW AMM 62-41-00, 4-1 PROCEDURE E1. REMOVED AND REPLACESDR QR9R2024032500001Pickup · failedON START UP, NR WAS AT IDLE THEN BEGAN FLUCTUATING TO ALMOST ZERO WITH BOTH ENGINES AT IDLE. REMOVED AND REPLACED SPEED PICK-UP IAW AMM 62-41-00, 4-1. MOC SUCCESSFULLY COMPLETED; NO FAULTS NOTED.SDR QR9R2024013100001Indicator · fluctuatesDURING HOVER, ROTOR TACH WOULD DROP TO 0 SEVERAL TIMES, THEN GO BACK TO NORMAL. REMOVED AND REPLACED TRIPLE INDICATOR IAW AMM 77-14-00, 4-1.SDR YV3R2023120100590Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY P/N: C792-5 ENGINE NEEDLE WAS OVERREADING 2%.SDR YV3R2023120100589Warning System · defectiveCUSTOMER REPORTED WARNING UNIT ASSEMBLY, LOW RPM P/N: A569-5 WAS INOPERATIVE.SDR 2023FA0000766Gauge · debondedMAST MOMENT WAS EXCEEDED IN A HOVER. LANDED THE AIRCRAFT WITH NO ISSUES. AFTER TROUBLESHOOTING FOUND THE STRAIN GAUGE IN THE MAST HAD DEBONDED CAUSING A FALSE INDICATION IN THE COCKPIT.SDR QR9R2023103100001Pickup · failedTRIPLE TACH/ROTOR RPM FAILURE DURING FLIGHT. DURING ROTOR SPEED FAILURE TROUBLESHOOTING, FOUND NR SENSOR BAD DURING FUNCTION TEST OF THE ROTOR SPEED MONITORING SYS AMM 62-41-00, 5-1. REMOVED AND REPLACED SPEED PICK-UP; LIMITED TEST FLIGHT SUCCESSFULLY COMPLETESDR YV3R2023111500586Warning Unit · defectiveCUSTOMER REPORTED WARNING UNIT, LOW RPM P/N: A569-9 PART FAILURE, HORN LIGHT STAYS ON.SDR QR9R2023071900001Pickup · illuminatedIN FLIGHT, VARNAR CAUTION APPEARED THREE TIMES. THE RPM R LIGHT AND AUDIO APPEARED WITH RPM R INDICATING 0% MULTIPLE TIMES. REMOVED AND REPLACED SPEED PICK-UP SENSOR IAW 62-41-00, 4-1. MOC SUCCESSFULLY COMPLETED.SDR JBZA20230706001Unknown · unknownTRIPLE TACHOMETER INDICATIONS LOST FOR # 1 , #2 ENGINES AND MAIN ROTOR TRANSMISSIONSDR YV3R2023051600567Relay · inoperativeCUSTOMER REPORTED RELAY ASSEMBLY P/N: B280-12 WAS INOPERATIVE (NO LOW RPM LIGHT OR HORN).SDR YV3R2023042700559Warning Unit · defectiveCUSTOMER REPORTED WARNING UNIT ASSEMBLY, LOW RPM P/N: A569-5 LOW ROTOR HORN SOUND INOPERATIVE.SDR YV3R2023042700558Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER P/N: C792-5 NEEDLES GET STUCK BETWEEN 68% - 90%.SDR YV3R2023042700555Warning Unit · defectiveCUSTOMER REPORTED WARNING UNIT P/N: A569-5 WAS INOPERATIVE.SDR ULXR307FD21323Sensor · failedNR SENSOR FAILURE. NR WENT TO ZERO IN FLIGHT. CAUSED TRANSPONDER TO GO OFF LINE AS AIRCRAFT THOUGHT IT WAS ON THE GROUND DUE TO ZERO ROTOR RPM.SDR YV3R2022111700547Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY P/N: C792-5 FLUCTUATES CAUSING OVER RPM.SDR QR9R2022101900002Indicator · intermittentDURING FLIGHT, TRIPLE TACH INTERMITTENT FAILURE. REPLACED TRIPLE TACH IAW 62-41-00,4-3. COMPLETED GROUND RUN AND FLIGHT IAW THE RFM. NO DISCREPANCIES NOTED.SDR YV3R2022111700546Warning Unit · inoperativeCUSTOMER REPORTED WARNING UNIT ASSEMBLY P/N: A569-5 WAS INOPERATIVE OUT OF THE BOX.SDR YV3R2022101500545None · faultyCUSTOMER REPORTED WARNING UNIT ASSEMBLY (LOW RPM) P/N: A569-5 WAS NOT SERVICEABLE.SDR YV3R2022100700544None · failedCUSTOMER REPORTED WARNING UNIT ASSEMBLY (LOW RPM) P/N: A569-9 FAILED TO ACTIVATE LIGHT AND HORN.SDR YV3R2022100700543None · defectiveCUSTOMER REPORTED WARNING UNIT ASSEMBLY (LOW RPM) P/N: A569-11 LOW ROTOR WARNING LIGHT AND SOUND (AUDIO) CAME ON DURING THE FIRST FLIGHT.SDR YV3R2022052600529None · defectiveCUSTOMER REPORTED WARNING UNIT ASSEMBLY P/N: A569-11 WAS INOPERATIVE.SDR YV3R2022050400527None · defectiveCUSTOMER REPORTED WARNING UNIT ASSEMBLY (RPM) P/N: A569-5 WAS INOPERATIVE.SDR YV3R2022050400525None · defectiveCUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY P/N: C792-4 NEEDLES WERE JUMPING WITHIN UNIT.SDR QR9R20220330001Pickup · faultyFIVE SECONDS AFTER STARTING #1 ENGINE, NR DROPPED TO ZERO THEN RETURNED 3 MINUTES LATER. AFTER RESET, NR LAGGED GOING INTO FLIGHT. TOOK OFF, DROPPED TO ZERO 3 TIMES IN FIVE MINUTE PERIOD. REPLACED SPEED PICK-UP, MOC SUCCESSFULLY COMPLETED.SDR YV3R2022050400524None · defectiveCUSTOMER REPORTED WARNING UNIT ASSEMBLY P/N: A569-9 FAILED TO REACT TO RPM'S.SDR YV3R2022021600517Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY P/N: A792-4 INDICATED INCORRECT READING.SDR YV3R2022021000515None · noneCUSTOMER REPORTED WARNING UNIT (LOW RPM) P/N" A569-5 WAS NOT FUNCTION AT FULL RPM.SDR YV3R2022021000514None · noneCUSTOMER REPORTED WARNING UNIT ASSEMBLY (LOW RPM) P/N: A569-11 LOW RPM LIGHT NEVER WENT OUT. CORRECTION: UNIQUE CONTROL # YV3R2022021000514, 3B (MANUFACTURER) : SHOULD BE "RROYCE"SDR YV3R2022021000513None · defectiveCUSTOMER REPORTED WARNING UNIT ASSEMBLY (LOW RPM) P/N: A569-11 LOW RPM LIGHT NEVER WENT OUT.SDR QR9R20211207003Pickup · faultyONCE THE #1 ENGINE WAS STARTED, NO NRO INDICATIONS. CALLED MAINTENANCE TO TROUBLESHOOT, RESET BAT AND GENERATORS FOR TROUBLESHOOTING. FOUND THAT AFTER START N2 NEEDLE INDICATED PROPERLY WHILE ROTOR TACH REMAINED AT ZERO. ADDITIONALLY, NR ON THE SYSTEM STATUS PSDR YV3R2021100700497Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER P/N: C792-4 WAS INTERMITTENT.SDR YV3R2021090100492Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY P/N: A792-4 ENGINE TACH NEEDLE READS 70% WITH ENGINE SHUT DOWN.SDR YV3R2021072200471Warning Unit · defectiveCUSTOMER REPORTED WARNING UNIT P/N: A569-9 HORN (AUDIO) DID NOT SOUND.SDR YV3R2021070700469Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER P/N: C792-4 ROTOR NEEDLE READS LOW 2-5%.SDR YV3R2021070700468Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER P/N: C792-4 ROTOR NEEDLE WAS INTERMITTENT, AND THEN FAIL COMPLETELY.SDR YV3R2021060900461Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER P/N: C792-4 ENGINE NEEDLE PEGS WITH POWER APPLIED.SDR YV3R2021052800458Warning Unit · defectiveCUSTOMER REPORTED WARNING UNIT (LOW RPM) P/N: A569-11 WAS NOT FUNCTIONING CORRECTLY, LOW RPM LIGHT ILLUMINATES WITH HORN SOUNDING.SDR YV3R2021052800457Warning Unit · defectiveCUSTOMER REPORTED WARNING UNIT ASSEMBLY (LOW RPM) P/N: A569-5 WAS INOPERATIVE.
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