Robinson Helicopter R44

Service difficulty reports · 447

Newest first. General aviation reporting is voluntary.

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 aircraft_model_key = 'R44'
  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 2026FA0000623Cylinder · scoredTHIS IS A NEW AIRCRAFT. LESS THAN 50HRS HAD BEEN FLOWN BEFORE WE FOUND ISSUES. LOGBOOK ENTRY, AIRCRAFT HAD A HARD STARTING CONDITION. FOUND STUCK INTAKE VALVES ON CYLINDERS 2, 4 & 5 WHILE DOING A COLD COMPRESSION CHECK. UPON FURTHER INSPECTION ALL THE EXHAUSTDec 5, 2025 · N306VA · Robsin R44 · Reciprocating Engine Cylinder SectionSDR 2025FA0000661Bracket · looseINSTALLED 3 DIFFERENT HARTZELL 149-12HT-H2 STARTERS (S/NS H-X112418, H-Z112422 & H-Z050870) BETWEEN 03/28/2025 AND 07/24/2025 ON A ROBINSON R44. EACH FAILED IN THE SAME MANNER AT 105.19, 82.66 & 9.91 HOURS TIME IN SERVICE RESPECTIVELY. IN EACH CASE THE ST2405 Aug 8, 2025 · N829AK · Robsin R44 · Engine StarterSDR 2024FA0000624Starter · deterioratedSKYTECH STARTERS HAVE ALWAYS BEEN THE GO TO & BEST IN THE BUSINESS BUT IN THE LAST YEAR OR 2 THEY HAVE MASSIVELY GONE DOWN HILL. WE HAVE HAD 3 STARTERS ON DIFFERENT HELICOPTERS IN THE PAST 6 MONTHS RANDOMLY FAIL IN VARIOUS WAYS. ONE BEING WHAT WE BELIEVE TO BEAug 20, 2024 · N832AK · Robsin R44 · Starter-GeneratorSDR 2NVA202408210020Control Rod · deformedDURING ATTEMPTED ROTOR ENGAGEMENT FOLLOWING ENGINE START, TAIL ROTOR PEDALS DEFLECTED FULL LEFT. ENGINE WAS IMMEDIATELY SHUT DOWN AFTER LESS THAN 45 DEGREES OF ROTOR MOVEMENT. INSPECTION REVEALED CONTACT BETWEEN AFT FLEX PLATE AND TAIL ROTOR CONTROL ROD. FURTHAug 18, 2024 · N740RH · Robsin R44 · Tail Rotor Control SystemSDR 2NVA202407090010Intake Valve · failedABOUT 30 MINUTES INTO A TOUR, PILOT HEARD A SOUND AND EXPERIENCED LOSS OF POWER AND HIGH MANIFOLD PRESSURE. INITIATED POWER ON LANDING ON AN ADJACENT OPEN FIELD. VISUAL INSPECTION REVEALED OIL LEAK NEAR CYLINDER # 6. UPON REMOVAL OF VALVE COVER A BROKEN OFF VAJul 9, 2024 · N328SS · Robsin R44 · Reciprocating Engine Cylinder SectionSDR 8HBR20240520062Ignition Unit · failedPILOTS REPORTED A ROUGH ENGINE RUNNING ON THE LEFT IGNITION UNIT (EIS). IT WAS DETERMINED THE EIS UNIT HAS FAILED. THIS IS THE SECOND EIS IGNITION UNIT TO FAIL ON THIS AIRCRAFT.May 19, 2024 · N4056V · Robsin R44 · Ignition SystemSDR YV3R2023120100590Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY P/N: C792-5 ENGINE NEEDLE WAS OVERREADING 2%.Nov 11, 2023 · Robsin R44 · Main Rotor Indicating SystemSDR 2NVA202311010001Intake Valve · damagedPILOT IDENTIFIED HIGH MANIFOLD PRESSURE REQUIRED AFTER TAKE OFF AND PERFORMED A PRE CAUTIONARY LANDING OFF AIRPORT. INSPECTION REVEALED A WET SPARK PLUG ON CYLINDER # 6. AFTER REMOVAL OF THE VALVE COVER, A BROKEN INTAKE VALVE TIP WAS DISCOVERED. NEW STYLE ROTAOct 28, 2023 · N328SS · Robsin R44 · Reciprocating Engine Cylinder SectionSDR YV3R2023120100588Governor · defectiveCUSTOMER REPORTED GOVERNOR ASSEMBLY P/N: B247-9 WAS INOPERATIVE.Oct 5, 2023 · Robsin R44 · Engine (Reciprocating)SDR 2023FA0000663Bolt · failedDISCOVERED ENGINE MOUNT. REMOVED ENGINE CHECKED TORQUE ON REMAINING 3 BOLLS,. ALL BOLTS TORQUED TO RHC SPECS. REPLACED ALL 4 BOLLS I TORQUED AND SAFELY WIRED LO RHC SPECS. ALSO REPLACED ALL 3 RUBBER ENGINE MOUNTS WITH NEW I NO DEFECTS FOUND(800HRS ON RUBBER EJul 26, 2023 · N568E · Robsin R44 · Engine Mount SectionSDR YV3R2023071000575Clutch · faultyCUSTOMER REPORTED HEAVY YAW MOVEMENTS WITH LOUD NOISES, C018-4 CLUTCH ASSEMBLY HAS ALUMINUM AND STEEL PARTICLES IN OIL.May 30, 2023 · Robsin R44 · Main Rotor Drive SystemSDR YV3R2023061500572Governor · defectiveCUSTOMER REPORTED GOVERNOR ASSEMBLY P/N: B247-5 HAS POSSIBLE FRICTION LOSS AT ARM.May 19, 2023 · Robsin R44 · Standard Practices/StructuresSDR YV3R2023061400571Switch · defectiveCUSTOMER REPORTED SWITCHES ASSEMBLY P/N: C053-2 HAS LOOSE CONNECTIONS.May 19, 2023 · Robsin R44 · Main Rotor Drive SystemSDR YV3R2023061400570Shield · crackedCUSTOMER REPORTED SHIELD ASSEMBLY P/N: D314-1 WAS FOUND CRACKED.May 18, 2023 · Robsin R44 · Engine Exhaust SystemSDR 2023FA0000214Sheave · unknownBUMPS OR BUBBLES WERE FOUND IN THE UPPER SHEAVE GROOVES. THESE SEEM TO BE CORROSION POCKETS BETWEEN THE METALIZED PLATING AND THE CAST ALUMINUM BASE. IF THIS CONTINUED IN SERVICE, ACCELERATED DRIVE BELT WEAR WILL OCCUR.Apr 13, 2023 · N4377U · Robsin R44 · Engine/Transmission CouplingSDR YV3R2023042700560Timer · defectiveCUSTOMER REPORTED TIME DELAY ASSEMBLY, LOW FUEL P/N: G655-1 LOW FUEL INDICATION INOPERATIVE.Apr 12, 2023 · Robsin R44 · Fuel Flow SensorSDR YV3R2023042700558Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER P/N: C792-5 NEEDLES GET STUCK BETWEEN 68% - 90%.Apr 11, 2023 · N7102Z · Robsin R44 · Main Rotor Indicating SystemSDR 2023FA0000151Bearing · roughFOUND ROUGH FEELING SWASHPLATE BEARING. THIS BEARING HAS A LIMITED LIFE LIMIT, BUT IS NEVER TO BE INSPECTED FOR ROUGHNESS. 100 HR/ ANNUAL INSPECTION PROCESS DOES NOT CALL FOR THE REMOVAL OF HARDWARE TO CHECK SWASHPLATE AT ANY HOUR/DATE INTERVAL. ROBINSON DMar 22, 2023 · N839RM · Robsin R44 · Main Rotor Mast/SwashplateSDR YV3R2022092300540Governor · defectiveCUSTOMER REPORTED GOVERNOR ASSEMBLY P/N: B247-5 ARM FRICTION WAS LOW.Sep 15, 2022 · Robsin R44 · Engine Indicating SystemSDR YV3R2022091400536Governor · faultedCUSTOMER REPORTED GOVERNOR ASSEMBLY P/N: B247-5 ARM FRICTION WAS HIGH.Aug 24, 2022 · Robsin R44 · Engine RPM Indicating SystemSDR 2022FA0000442Intake Valve · burnedLOW CYLINDER COMPRESSIONS WERE NOTED AT ANNUAL FOR AN ENGINE THAT WAS REPAIRED BY LYCOMING ONLY 180 HRS PRIOR TO CURRENT INSPECTION. BORESCOPE REVEALED BURNED INTAKE VALVES. CRANKSHAFT EXPANSION PLUG HAD A SUNSTANTIAL OIL LEAK AND CRANKSHAFT SEAL WAS LOOSE IN May 19, 2022 · N41LY · Robsin R44 · Reciprocating Engine Cylinder SectionSDR 2022FA0000523Exhaust Valve · brokenDURING CRUISE FLIGHT ENGINE BEGAN TO RUN ROUGH AND AN INCREASED POWER SETTING WAS REQUIRED TO MAINTAIN LEVEL FLIGHT. THE HELICOPTER IMMEDIATELY RETURNED TO THE HELIPAD AND MADE A NORMAL LANDING. BORE SCOPE INSPECTION REVEALED THAT THE #3 CYLINDER EXHAUST VALVEMar 22, 2022 · N7197V · Robsin R44 · Reciprocating Engine Cylinder SectionSDR 2022FA0000090None · properICE FORMED INSIDE TAIL ROTOR SLIDER ASSEMBLY AFTER TAKE OFF DUE TO SUB FREEZING TEMPERATURES. NOTE: A/C EXPOSED TO RAIN PREVIOUS DAY AT OAT NEAR 60 F. AFTER FRONTAL PASSAGE OAT DROPPED TO 9*F, BUT AIRCRAFT WAS STORED IN DRY HANGER FOR 12 HOURS PRIOR TO FLIGHJan 20, 2022 · N211TB · Robsin R44 · Flight Control SystemSDR YV3R2021112000502None · noneCUSTOMER REPORTED CONTROLLER ASSEMBLY P/N: D278-1 ALLOWED RPM'S TO KEEP CLIMBING.Nov 5, 2021 · Robsin R44 · Engine RPM Indicating SystemSDR YV3R2021100700497Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER P/N: C792-4 WAS INTERMITTENT.Sep 22, 2021 · N808LB · Robsin R44 · Main Rotor Indicating SystemSDR YV3R2021082800483Actuator · defectiveCUSTOMER REPORTED ACTUATOR ASSEMBLY P/N: C051-2 LOWER LIMIT SWITCH MALFUNCTIONED.Aug 24, 2021 · Robsin R44 · Main Rotor Drive SystemSDR YV3R2021082800480Actuator · defectiveCUSTOMER REPORTED ACTUATOR ASSEMBLY P/N: C051-1 WILL NOT DISENGAGE DURING SWITCH SPRING TEST METHOD 1.Aug 13, 2021 · Robsin R44 · Main Rotor Drive SystemSDR YV3R2021081100479Governor · defectiveCUSTOMER REPORTED GOVERNOR ASSEMBLY P/N: B247-5 WAS UNSERVICEABLE.Jul 29, 2021 · Robsin R44 · Engine (Reciprocating)SDR YV3R2021081000476Gauge · defectiveCUSTOMER REPORTED MANIFOLD PRESSURE GAGE P/N: A600-4 WAS FAULTY.Jul 22, 2021 · Robsin R44 · Manifold Pressure (MP) IndicatingSDR YV3R2021081000475Gauge · faultedCUSTOMER REPORTED CARBURETOR AIR TEMPERATURE GAUGE P/N: C604-8 WAS FAULTY.Jul 22, 2021 · Robsin R44 · Engine Air Intake SystemSDR YV3R2021070700468Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER P/N: C792-4 ROTOR NEEDLE WAS INTERMITTENT, AND THEN FAIL COMPLETELY.Jun 29, 2021 · N46SG · Robsin R44 · Main Rotor Indicating SystemSDR YV3R2021062200463Actuator · defectiveCUSTOMER REPORTED ACTUATOR ASSEMBLY P/N: C051-1 DID NOT COLLAPSE A COLUMN.Jun 8, 2021 · Robsin R44 · Main Rotor Drive SystemSDR YV3R2021060900461Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER P/N: C792-4 ENGINE NEEDLE PEGS WITH POWER APPLIED.Jun 1, 2021 · N715SG · Robsin R44 · Main Rotor Indicating SystemSDR YV3R2021090100489Sheave · defectiveCUSTOMER SHEAVE, LOWER P/N: A493-1 RECEIVED FOR WARRANTY. AFTER EVALUATION, BASE MATERIAL (ALUMINUM) HAD CORROSION, WHICH CAUSED BUBBLING BETWEEN ALUMINUM AND METALIZED COATING MATERIAL.May 27, 2021 · N969TA · Robsin R44 · Main Rotor Drive SystemSDR YV3R2021052800454Indicator · defectiveCUSTOMER REPORTED AIRSPEED INDICATOR P/N: C599-1 NEEDLE WAS ERRATIC.May 11, 2021 · N42127 · Robsin R44 · Airspeed/Mach IndicatorSDR 2021FA0000121Harness · lockedMULTIPLE TIMES DURING MULTIPLE FLIGHTS, PILOTS 5 POINT HARNESS WOULD LOCK UP AND NOT RELEASE, NOT ALLOWING THE PILOT TO ACCESS FORWARD CONTROLS.May 3, 2021 · N4911X · Robsin R44 · Emergency EquipmentSDR YV3R2021043000452Gauge · defectiveREVISED UNIQUE CONTROL #: CUSTOMER REPORTED MANIFOLD PRESSURE GAGE P/N: A600-4 WILL NOT DISPLAY CORRECT PRESSURE.Apr 20, 2021 · N988DC · Robsin R44 · Manifold Pressure (MP) IndicatingSDR 2021FA0000119Gauge · defectiveCUSTOMER REPORTED MANIFOLD PRESSURE GAGE P/N: A600-4 WILL NOT DISPLAY CORRECT PRESSURE.Apr 20, 2021 · N988DC · Robsin R44 · Manifold Pressure (MP) IndicatingSDR YV3R2021031300447Motor · defectiveCUSTOMER REPORTED GEARMOTOR ASSEMBLY P/N: D276-1 OPERATION TOO SLOW.Mar 5, 2021 · Robsin R44 · Main Rotor Drive SystemSDR HLXR202108170001Extinguisher · failedAIRCRAFT WAS FLYING APPROX 100 AGL AT 20 KNTS, FIRE NOZZLE BLEW OFF THE BOTTLE GOING THROUGH THE LT FWD WINDSCREEN. PILOT MAINTAINED CONTROL AND LANDED. BELIEVE THE HEATER VENT WAS BLOWING HOT AIR ON THE EXTINGUISHER, CAUSING THE PROBLEM. RECOMMEND RELOCATINMar 1, 2021 · N506KG · Robsin R44 · Extinguishing SystemSDR YV3R2021031200445Gauge · defectiveCUSTOMER REPORTED MANIFOLD ABSOLUTE PRESSURE GAGE (M.A.P) P/N: A600-4 WAS INTERMITTENT IN OPERATION.Mar 1, 2021 · Robsin R44 · Manifold Pressure (MP) IndicatingSDR YV3R2021031200444Motor · defectiveCUSTOMER REPORTED GEARMOTOR ASSEMBLY P/N: D276-3 WAS INTERMITTENT IN OPERATION.Mar 1, 2021 · Robsin R44 · Main Rotor Drive SystemSDR YV3R2021030300440Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY P/N: C792-5 ENGINE RPM INDICATION WAS IRREGULAR.Feb 16, 2021 · Robsin R44 · Main Rotor Indicating SystemSDR YV3R2021022200437Gauge · defectiveCUSTOMER REPORTED MANIFOLD ABSOLUTE PRESSURE GAGE (M.A.P) P/N: A600-4 INDICATING NEEDLE STUCK.Feb 16, 2021 · Robsin R44 · Manifold Pressure (MP) IndicatingSDR YV3R2021022200436Gauge · defectiveCUSTOMER REPORTED MANIFOLD ABSOLUTE PRESSURE GAGE (M.A.P) P/N: A600-4 NEEDLE INDICATING INCORRECTLY.Feb 16, 2021 · Robsin R44 · Manifold Pressure (MP) IndicatingSDR YV3R2021022200435Transmitter · defectiveCUSTOMER REPORTED SENDER-FUEL LEVEL PN: D252-1 WAS READING INCORRECTLY.Feb 16, 2021 · Robsin R44 · Fuel Quantity SensorSDR YV3R2021022200434Governor · defectiveCUSTOMER REPORTED CONTROLLER ASSEMBLY (GOVERNOR) PN: D278-1 WAS INOPERATIVE WHEN TURNED ON ABOVE 80%.Feb 10, 2021 · N888SN · Robsin R44 · Engine RPM Indicating SystemSDR YV3R2021022200433Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY PN: C792-4 ROTOR NEEDLE WAS INOPERATIVE.Feb 9, 2021 · N72SL · Robsin R44 · Main Rotor Indicating SystemSDR 2021FA0000030Governor · failedDURING AIRCRAFT RUN-UP PROCEDURES PILOT ENGAGED GOVERNOR SWITCH INCREASED THROTTLE TO 832% FOR GOVERNOR TO TAKE OVER. GOVERNOR FAILED TO ENGAGE, AIRCRAFT SHUT DOWN NORMALLY. MECHANIC PERFORMED TROUBLESHOOTING PROCEDURES FOUND GOVERNOR CONTROLLER PN D278-1 TOFeb 3, 2021 · N888SN · Robsin R44 · Engine ControlsSDR YV3R2021012200427Gauge · defectiveCUSTOMER REPORTED MANIFOLD ABSOLUTE PRESSURE GAGE (M.A.P) P/N: A600-7 NEEDLE INDICATION WAS LAGGING.Jan 20, 2021 · Robsin R44 · Manifold Pressure (MP) Indicating
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