# Service difficulty reports: Robinson Helicopter R44

A list on [Robinson Helicopter R44](https://openairdocs.org/model/robinson-helicopter-r44.md).

Newest first. General aviation reporting is voluntary.

Page 1 of 9 · 447 reports

- [SDR 2026FA0000623](https://openairdocs.org/sdr/2026FA0000623.md): Cylinder · scored · Dec 5, 2025 · N306VA · Robsin R44 · Reciprocating Engine Cylinder Section
  > THIS 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 EXHAUST
- [SDR 2025FA0000661](https://openairdocs.org/sdr/2025FA0000661.md): Bracket · loose · Aug 8, 2025 · N829AK · Robsin R44 · Engine Starter
  > INSTALLED 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
- [SDR 2024FA0000624](https://openairdocs.org/sdr/2024FA0000624.md): Starter · deteriorated · Aug 20, 2024 · N832AK · Robsin R44 · Starter-Generator
  > SKYTECH 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 BE
- [SDR 2NVA202408210020](https://openairdocs.org/sdr/2NVA202408210020.md): Control Rod · deformed · Aug 18, 2024 · N740RH · Robsin R44 · Tail Rotor Control System
  > DURING 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. FURTH
- [SDR 2NVA202407090010](https://openairdocs.org/sdr/2NVA202407090010.md): Intake Valve · failed · Jul 9, 2024 · N328SS · Robsin R44 · Reciprocating Engine Cylinder Section
  > ABOUT 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 VA
- [SDR 8HBR20240520062](https://openairdocs.org/sdr/8HBR20240520062.md): Ignition Unit · failed · May 19, 2024 · N4056V · Robsin R44 · Ignition System
  > PILOTS 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.
- [SDR YV3R2023120100590](https://openairdocs.org/sdr/YV3R2023120100590.md): Dual Tachometer · defective · Nov 11, 2023 · Robsin R44 · Main Rotor Indicating System
  > CUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY P/N: C792-5 ENGINE NEEDLE WAS OVERREADING 2%.
- [SDR 2NVA202311010001](https://openairdocs.org/sdr/2NVA202311010001.md): Intake Valve · damaged · Oct 28, 2023 · N328SS · Robsin R44 · Reciprocating Engine Cylinder Section
  > PILOT 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 ROTA
- [SDR YV3R2023120100588](https://openairdocs.org/sdr/YV3R2023120100588.md): Governor · defective · Oct 5, 2023 · Robsin R44 · Engine (Reciprocating)
  > CUSTOMER REPORTED GOVERNOR ASSEMBLY P/N: B247-9 WAS INOPERATIVE.
- [SDR 2023FA0000663](https://openairdocs.org/sdr/2023FA0000663.md): Bolt · failed · Jul 26, 2023 · N568E · Robsin R44 · Engine Mount Section
  > DISCOVERED 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 E
- [SDR YV3R2023071000575](https://openairdocs.org/sdr/YV3R2023071000575.md): Clutch · faulty · May 30, 2023 · Robsin R44 · Main Rotor Drive System
  > CUSTOMER REPORTED HEAVY YAW MOVEMENTS WITH LOUD NOISES, C018-4 CLUTCH ASSEMBLY HAS ALUMINUM AND STEEL PARTICLES IN OIL.
- [SDR YV3R2023061500572](https://openairdocs.org/sdr/YV3R2023061500572.md): Governor · defective · May 19, 2023 · Robsin R44 · Standard Practices/Structures
  > CUSTOMER REPORTED GOVERNOR ASSEMBLY P/N: B247-5 HAS POSSIBLE FRICTION LOSS AT ARM.
- [SDR YV3R2023061400571](https://openairdocs.org/sdr/YV3R2023061400571.md): Switch · defective · May 19, 2023 · Robsin R44 · Main Rotor Drive System
  > CUSTOMER REPORTED SWITCHES ASSEMBLY P/N: C053-2 HAS LOOSE CONNECTIONS.
- [SDR YV3R2023061400570](https://openairdocs.org/sdr/YV3R2023061400570.md): Shield · cracked · May 18, 2023 · Robsin R44 · Engine Exhaust System
  > CUSTOMER REPORTED SHIELD ASSEMBLY P/N: D314-1 WAS FOUND CRACKED.
- [SDR 2023FA0000214](https://openairdocs.org/sdr/2023FA0000214.md): Sheave · unknown · Apr 13, 2023 · N4377U · Robsin R44 · Engine/Transmission Coupling
  > BUMPS 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.
- [SDR YV3R2023042700560](https://openairdocs.org/sdr/YV3R2023042700560.md): Timer · defective · Apr 12, 2023 · Robsin R44 · Fuel Flow Sensor
  > CUSTOMER REPORTED TIME DELAY ASSEMBLY, LOW FUEL P/N: G655-1 LOW FUEL INDICATION INOPERATIVE.
- [SDR YV3R2023042700558](https://openairdocs.org/sdr/YV3R2023042700558.md): Dual Tachometer · defective · Apr 11, 2023 · N7102Z · Robsin R44 · Main Rotor Indicating System
  > CUSTOMER REPORTED DUAL TACHOMETER P/N: C792-5 NEEDLES GET STUCK BETWEEN 68% - 90%.
- [SDR 2023FA0000151](https://openairdocs.org/sdr/2023FA0000151.md): Bearing · rough · Mar 22, 2023 · N839RM · Robsin R44 · Main Rotor Mast/Swashplate
  > FOUND 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 D
- [SDR YV3R2022092300540](https://openairdocs.org/sdr/YV3R2022092300540.md): Governor · defective · Sep 15, 2022 · Robsin R44 · Engine Indicating System
  > CUSTOMER REPORTED GOVERNOR ASSEMBLY P/N: B247-5 ARM FRICTION WAS LOW.
- [SDR YV3R2022091400536](https://openairdocs.org/sdr/YV3R2022091400536.md): Governor · faulted · Aug 24, 2022 · Robsin R44 · Engine RPM Indicating System
  > CUSTOMER REPORTED GOVERNOR ASSEMBLY P/N: B247-5 ARM FRICTION WAS HIGH.
- [SDR 2022FA0000442](https://openairdocs.org/sdr/2022FA0000442.md): Intake Valve · burned · May 19, 2022 · N41LY · Robsin R44 · Reciprocating Engine Cylinder Section
  > LOW 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
- [SDR 2022FA0000523](https://openairdocs.org/sdr/2022FA0000523.md): Exhaust Valve · broken · Mar 22, 2022 · N7197V · Robsin R44 · Reciprocating Engine Cylinder Section
  > DURING 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 VALVE
- [SDR 2022FA0000090](https://openairdocs.org/sdr/2022FA0000090.md): None · proper · Jan 20, 2022 · N211TB · Robsin R44 · Flight Control System
  > ICE 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 FLIGH
- [SDR YV3R2021112000502](https://openairdocs.org/sdr/YV3R2021112000502.md): None · none · Nov 5, 2021 · Robsin R44 · Engine RPM Indicating System
  > CUSTOMER REPORTED CONTROLLER ASSEMBLY P/N: D278-1 ALLOWED RPM'S TO KEEP CLIMBING.
- [SDR YV3R2021100700497](https://openairdocs.org/sdr/YV3R2021100700497.md): Dual Tachometer · defective · Sep 22, 2021 · N808LB · Robsin R44 · Main Rotor Indicating System
  > CUSTOMER REPORTED DUAL TACHOMETER P/N: C792-4 WAS INTERMITTENT.
- [SDR YV3R2021082800483](https://openairdocs.org/sdr/YV3R2021082800483.md): Actuator · defective · Aug 24, 2021 · Robsin R44 · Main Rotor Drive System
  > CUSTOMER REPORTED ACTUATOR ASSEMBLY P/N: C051-2 LOWER LIMIT SWITCH MALFUNCTIONED.
- [SDR YV3R2021082800480](https://openairdocs.org/sdr/YV3R2021082800480.md): Actuator · defective · Aug 13, 2021 · Robsin R44 · Main Rotor Drive System
  > CUSTOMER REPORTED ACTUATOR ASSEMBLY P/N: C051-1 WILL NOT DISENGAGE DURING SWITCH SPRING TEST METHOD 1.
- [SDR YV3R2021081100479](https://openairdocs.org/sdr/YV3R2021081100479.md): Governor · defective · Jul 29, 2021 · Robsin R44 · Engine (Reciprocating)
  > CUSTOMER REPORTED GOVERNOR ASSEMBLY P/N: B247-5 WAS UNSERVICEABLE.
- [SDR YV3R2021081000476](https://openairdocs.org/sdr/YV3R2021081000476.md): Gauge · defective · Jul 22, 2021 · Robsin R44 · Manifold Pressure (MP) Indicating
  > CUSTOMER REPORTED MANIFOLD PRESSURE GAGE P/N: A600-4 WAS FAULTY.
- [SDR YV3R2021081000475](https://openairdocs.org/sdr/YV3R2021081000475.md): Gauge · faulted · Jul 22, 2021 · Robsin R44 · Engine Air Intake System
  > CUSTOMER REPORTED CARBURETOR AIR TEMPERATURE GAUGE P/N: C604-8 WAS FAULTY.
- [SDR YV3R2021070700468](https://openairdocs.org/sdr/YV3R2021070700468.md): Dual Tachometer · defective · Jun 29, 2021 · N46SG · Robsin R44 · Main Rotor Indicating System
  > CUSTOMER REPORTED DUAL TACHOMETER P/N: C792-4 ROTOR NEEDLE WAS INTERMITTENT, AND THEN FAIL COMPLETELY.
- [SDR YV3R2021062200463](https://openairdocs.org/sdr/YV3R2021062200463.md): Actuator · defective · Jun 8, 2021 · Robsin R44 · Main Rotor Drive System
  > CUSTOMER REPORTED ACTUATOR ASSEMBLY P/N: C051-1 DID NOT COLLAPSE A COLUMN.
- [SDR YV3R2021060900461](https://openairdocs.org/sdr/YV3R2021060900461.md): Dual Tachometer · defective · Jun 1, 2021 · N715SG · Robsin R44 · Main Rotor Indicating System
  > CUSTOMER REPORTED DUAL TACHOMETER P/N: C792-4 ENGINE NEEDLE PEGS WITH POWER APPLIED.
- [SDR YV3R2021090100489](https://openairdocs.org/sdr/YV3R2021090100489.md): Sheave · defective · May 27, 2021 · N969TA · Robsin R44 · Main Rotor Drive System
  > CUSTOMER 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.
- [SDR YV3R2021052800454](https://openairdocs.org/sdr/YV3R2021052800454.md): Indicator · defective · May 11, 2021 · N42127 · Robsin R44 · Airspeed/Mach Indicator
  > CUSTOMER REPORTED AIRSPEED INDICATOR P/N: C599-1 NEEDLE WAS ERRATIC.
- [SDR 2021FA0000121](https://openairdocs.org/sdr/2021FA0000121.md): Harness · locked · May 3, 2021 · N4911X · Robsin R44 · Emergency Equipment
  > MULTIPLE TIMES DURING MULTIPLE FLIGHTS, PILOTS 5 POINT HARNESS WOULD LOCK UP AND NOT RELEASE, NOT ALLOWING THE PILOT TO ACCESS FORWARD CONTROLS.
- [SDR YV3R2021043000452](https://openairdocs.org/sdr/YV3R2021043000452.md): Gauge · defective · Apr 20, 2021 · N988DC · Robsin R44 · Manifold Pressure (MP) Indicating
  > REVISED UNIQUE CONTROL #: CUSTOMER REPORTED MANIFOLD PRESSURE GAGE P/N: A600-4 WILL NOT DISPLAY CORRECT PRESSURE.
- [SDR 2021FA0000119](https://openairdocs.org/sdr/2021FA0000119.md): Gauge · defective · Apr 20, 2021 · N988DC · Robsin R44 · Manifold Pressure (MP) Indicating
  > CUSTOMER REPORTED MANIFOLD PRESSURE GAGE P/N: A600-4 WILL NOT DISPLAY CORRECT PRESSURE.
- [SDR YV3R2021031300447](https://openairdocs.org/sdr/YV3R2021031300447.md): Motor · defective · Mar 5, 2021 · Robsin R44 · Main Rotor Drive System
  > CUSTOMER REPORTED GEARMOTOR ASSEMBLY P/N: D276-1 OPERATION TOO SLOW.
- [SDR HLXR202108170001](https://openairdocs.org/sdr/HLXR202108170001.md): Extinguisher · failed · Mar 1, 2021 · N506KG · Robsin R44 · Extinguishing System
  > AIRCRAFT 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 RELOCATIN
- [SDR YV3R2021031200445](https://openairdocs.org/sdr/YV3R2021031200445.md): Gauge · defective · Mar 1, 2021 · Robsin R44 · Manifold Pressure (MP) Indicating
  > CUSTOMER REPORTED MANIFOLD ABSOLUTE PRESSURE GAGE (M.A.P) P/N: A600-4 WAS INTERMITTENT IN OPERATION.
- [SDR YV3R2021031200444](https://openairdocs.org/sdr/YV3R2021031200444.md): Motor · defective · Mar 1, 2021 · Robsin R44 · Main Rotor Drive System
  > CUSTOMER REPORTED GEARMOTOR ASSEMBLY P/N: D276-3 WAS INTERMITTENT IN OPERATION.
- [SDR YV3R2021030300440](https://openairdocs.org/sdr/YV3R2021030300440.md): Dual Tachometer · defective · Feb 16, 2021 · Robsin R44 · Main Rotor Indicating System
  > CUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY P/N: C792-5 ENGINE RPM INDICATION WAS IRREGULAR.
- [SDR YV3R2021022200437](https://openairdocs.org/sdr/YV3R2021022200437.md): Gauge · defective · Feb 16, 2021 · Robsin R44 · Manifold Pressure (MP) Indicating
  > CUSTOMER REPORTED MANIFOLD ABSOLUTE PRESSURE GAGE (M.A.P) P/N: A600-4 INDICATING NEEDLE STUCK.
- [SDR YV3R2021022200436](https://openairdocs.org/sdr/YV3R2021022200436.md): Gauge · defective · Feb 16, 2021 · Robsin R44 · Manifold Pressure (MP) Indicating
  > CUSTOMER REPORTED MANIFOLD ABSOLUTE PRESSURE GAGE (M.A.P) P/N: A600-4 NEEDLE INDICATING INCORRECTLY.
- [SDR YV3R2021022200435](https://openairdocs.org/sdr/YV3R2021022200435.md): Transmitter · defective · Feb 16, 2021 · Robsin R44 · Fuel Quantity Sensor
  > CUSTOMER REPORTED SENDER-FUEL LEVEL PN: D252-1 WAS READING INCORRECTLY.
- [SDR YV3R2021022200434](https://openairdocs.org/sdr/YV3R2021022200434.md): Governor · defective · Feb 10, 2021 · N888SN · Robsin R44 · Engine RPM Indicating System
  > CUSTOMER REPORTED CONTROLLER ASSEMBLY (GOVERNOR) PN: D278-1 WAS INOPERATIVE WHEN TURNED ON ABOVE 80%.
- [SDR YV3R2021022200433](https://openairdocs.org/sdr/YV3R2021022200433.md): Dual Tachometer · defective · Feb 9, 2021 · N72SL · Robsin R44 · Main Rotor Indicating System
  > CUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY PN: C792-4 ROTOR NEEDLE WAS INOPERATIVE.
- [SDR 2021FA0000030](https://openairdocs.org/sdr/2021FA0000030.md): Governor · failed · Feb 3, 2021 · N888SN · Robsin R44 · Engine Controls
  > DURING 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 TO
- [SDR YV3R2021012200427](https://openairdocs.org/sdr/YV3R2021012200427.md): Gauge · defective · Jan 20, 2021 · Robsin R44 · Manifold Pressure (MP) Indicating
  > CUSTOMER REPORTED MANIFOLD ABSOLUTE PRESSURE GAGE (M.A.P) P/N: A600-7 NEEDLE INDICATION WAS LAGGING.

Next page: https://openairdocs.org/model/robinson-helicopter-r44/reports.md?page=2

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
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
```

This list as a web page: https://openairdocs.org/model/robinson-helicopter-r44/reports

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