Lycoming O-540-F1B5

Service difficulty reports · 378

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 engine_model_key = 'O540F1B5'
  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 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 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 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 YV3R2023061400571Switch · defectiveCUSTOMER REPORTED SWITCHES ASSEMBLY P/N: C053-2 HAS LOOSE CONNECTIONS.May 19, 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 YV3R2023061400570Shield · crackedCUSTOMER REPORTED SHIELD ASSEMBLY P/N: D314-1 WAS FOUND CRACKED.May 18, 2023 · Robsin R44 · Engine Exhaust SystemSDR 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 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 YV3R2022021000516None · noneCUSTOMER REPORTED FUEL SENDER (LEVEL) P/N: D252-1 CAUSED ERRATIC READINGS ON GAUGE ASSEMBLY.Jan 25, 2022 · N988DC · Robsin R22 · Fuel Quantity SensorSDR YV3R2022011000506None · noneGOVERNOR CONTROLLER P/N: D278-1 UNRESPONSIVE DURING AUTOROTATION RECOVERY TRAINING.Dec 14, 2021 · Robsin R22 · Engine RPM Indicating SystemSDR YV3R2021110900501None · noneCUSTOMER REPORTED ACTUATOR ASSEMBLY P/N: C051-1 COLUMN SWITCH FAILED.Nov 2, 2021 · N161WP · Robsin R22 · Main Rotor Drive SystemSDR YV3R2021110900500Collector · crackedCUSTOMER REPORTED COLLECTOR P/N: C169-5 EXHAUST (LH) WAS CRACKED.Oct 20, 2021 · Robsin R22 · Engine Exhaust 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 YV3R2021081000475Gauge · faultedCUSTOMER REPORTED CARBURETOR AIR TEMPERATURE GAUGE P/N: C604-8 WAS FAULTY.Jul 22, 2021 · Robsin R44 · Engine Air Intake SystemSDR YV3R2021081000476Gauge · defectiveCUSTOMER REPORTED MANIFOLD PRESSURE GAGE P/N: A600-4 WAS FAULTY.Jul 22, 2021 · Robsin R44 · Manifold Pressure (MP) IndicatingSDR 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 YV3R2021052800453Switch · defectiveCUSTOMER REPORTED SWITCHES ASSEMBLY P/N: C053-2 HAD A FAULTY SWITCH.May 11, 2021 · N8330G · Robsin R22BETA · Electrical Power SystemSDR 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 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 2021FA0000162Cylinder Head · crackedDURING FLIGHT, THE PILOT NOTICED A 20 KNOT LOSS UNDER MAXIMUM CONTINUOUS POWER. UPON LANDING AND INSPECTION, OIL SPRAY WAS FOUND ON RIGHT SIDE OF ENGINE AND FIREWALL. OIL QUANTITY, PRESSURE, AND TEMPERATURE INDICATORS WERE IN THE GREEN. OIL CONSUMPTION WENT FRApr 4, 2021 · N306M · Reciprocating Engine Cylinder SectionSDR 2021FA0000163Cylinder Head · crackedDURING FLIGHT, THE PILOT NOTICED A 20 KNOT LOSS UNDER MAXIMUM CONTINUOUS POWER. UPON LANDING AND INSPECTION, OIL SPRAY WAS FOUND ON RIGHT SIDE OF ENGINE AND FIREWALL. OIL QUANTITY, PRESSURE, AND TEMPERATURE INDICATORS WERE IN THE GREEN. OIL CONSUMPTION WENT FRApr 4, 2021 · N306MB · Reciprocating Engine Cylinder SectionSDR YV3R2021031300447Motor · defectiveCUSTOMER REPORTED GEARMOTOR ASSEMBLY P/N: D276-1 OPERATION TOO SLOW.Mar 5, 2021 · Robsin R44 · Main Rotor Drive SystemSDR YV3R2021031200444Motor · defectiveCUSTOMER REPORTED GEARMOTOR ASSEMBLY P/N: D276-3 WAS INTERMITTENT IN OPERATION.Mar 1, 2021 · Robsin R44 · Main Rotor Drive 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 YV3R2021022200435Transmitter · defectiveCUSTOMER REPORTED SENDER-FUEL LEVEL PN: D252-1 WAS READING INCORRECTLY.Feb 16, 2021 · Robsin R44 · Fuel Quantity SensorSDR 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 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 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 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 YV3R2021020400431Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY P/N: C792-4 WAS INDICATING ERRATIC.Feb 1, 2021 · N34TB · Robsin R44RAVENII · Main Rotor Indicating SystemSDR YV3R2021020400430Indicator · defectiveCUSTOMER REPORTED ATTITUDE INDICATOR P/N: B823-12 WAS READING INACCURATELY.Jan 20, 2021 · Robsin R44RAVENII · Attitude Gyro and Indicating SystemSDR YV3R2021011100419Shield · crackedCUSTOMER REPORTED EXHAUST SHIELD ASSEMBLY P/N: D314-1 WAS CRACKED.Jan 7, 2021 · Robsin R44 · Engine Exhaust SystemSDR YV3R2021012000423Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY P/N: ROTOR NEEDLE WAS INTERMITTENT.Jan 7, 2021 · Robsin R44 · Main Rotor Indicating SystemSDR YV3R2021012000421Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY P/N: C792-4 ROTOR NEEDLE GOES FULL SCALE.Jan 6, 2021 · Robsin R44 · Main Rotor Indicating SystemSDR YV3R2021010500412Dual Tachometer · defectiveCUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY P/N: C792-4 ROTOR NEEDLE WAS UNSERVICEABLE.Dec 18, 2020 · Robsin R44 · Main Rotor Indicating SystemSDR YV3R2021010700414Dual Tachometer · reads lowCUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY P/N: C972-4 RPM NEEDLE READS LOW (INACCURATE).Dec 18, 2020 · Robsin R44 · Main Rotor Indicating System
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