Lycoming O-360-A4M

Service difficulty reports · 559

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 = 'O360A4M'
  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 2026FA0000604Carburetor · faultedAFTER ONLY 360.49 TACH HOURS IN SERVICE FOUND THROTTLE GETTING STUCK BEFORE FULL THROTTLE STOP. SUSPECTED ACCELERATOR PUMP PLUNGER GETTING STUCK NOT ALLOWING THROTTLE ARM TO HIT FULL THROTTLE STOP.Jul 2, 2026 · N172KJ · Cessna 172N · Fuel Control/Reciprocating EnginesSDR 2026FA0000201Impulse Coupling · defectiveMAGNETO PULLED DURING ROUTINE MAINTENANCE TO CHECK FOR THE PRESENCE OF A CHAMPION MANUFACTURED IMPULSE COUPLING. ONE WAS FOUND INSTALLED AND THUS REMOVED FOR REPLACEMENT WITH A NEW ES3163 IMPULSE COUPLING. AFTER REMOVAL OF THE OLD IMPULSE COUPLING, I DISASSEMMar 20, 2026 · N314AV · Cessna 172M · Magneto/DistributorSDR 2025FA0000633Cylinder Head · crackedNR 4 CYLINDER HEAD CRACKED ACROSS COOLING FINS IN FLIGHT. CREW NOTICED LOSS OF POWER/SHUDDER.Sep 9, 2025 · N99040 · Cessna 172P · Reciprocating Engine Cylinder SectionSDR 2025FA0000253Retaining Ring · defectiveDURING THE INSTALLATION OF THE RETAINING RING IT IMMEDIATELY BROKE. SENT THE STRUT TO ANOTHER SHOP THEY ATTEMPTED AND BROKE 2 MORE. SPOKE WITH PIPER TECHNICIAN AND RECEIVED THIS AS A RESPONSE. "AS PER OUR PHONE CONVERSATION YESTERDAY REGARDING THE INSTALLATIONApr 8, 2025 · N43753 · Piper PA28181 · Nose/Tail Landing GearSDR 2025FA0000204Carburetor · faultedFARGO, ND (FAR): N113SW, P28A, FAR-FAR, DECLARED AN EMERGENCY DUE TO A ROUGH RUNNING ENGINE. ACFT RETURNED TO FAR ARPT, LANDED, AND TAXIED TO THE RAMP WITHOUT FURTHER INCIDENT. 11/15/2024 2238Z. OVERHAULED CARBURETOR INSTALLED ON NOVEMBER 8TH, 2024.Nov 15, 2024 · N113SW · Piper PA28181 · Fuel Control/Reciprocating EnginesSDR 2024FA0000288Bulkhead · crackedFWD SPINNER BULKHEAD DEVELOPED CRACKS NEAR BOLTS, OBSERVED THAT CRACKS CONTINUE TO DEVELP AFTER REPLACEMENT, AFTER ONLY A FEW HOURS IN SERVICE.Apr 4, 2024 · N644FT · Piper PA28181 · Propeller SystemSDR 2024FA0000061Rivet · looseMAGNETO P/N 4371 S/N 22071298. LOOSE RIVETS FOUND ON IMPULSE COUPLING DURING 500 HOUR INSPECTION. REPLACED IMPULSE COUPLING WITH NEW.Jan 15, 2024 · N475TA · Magneto/DistributorSDR 2024FA0000060Rivet · looseMAGNETO P/N 4371 S/N 22070051. LOOSE RIVETS FOUND ON IMPULSE COUPLING DURING 500 HOUR INSPECTION. REPLACED IMPULSE COUPLING WITH NEW.Jan 11, 2024 · N662A · Magneto/DistributorSDR 2024FA0000059Impulse Coupling · damagedMAGNETO P/N 4371 S/N 21030390. LOOSE RIVETS FOUND ON IMPULSE COUPLING DURING 500 HOUR INSPECTION. REPLACED IMPULSE COUPLING WITH NEW.Dec 14, 2023 · N959G · Magneto/DistributorSDR 2024FA0000058Rivet · looseMAGNETO P/N 4371 S/N 22010949. LOOSE RIVETS FOUND ON IMPULSE COUPLING DURING 500 HOUR INSPECTION. REPLACED IMPULSE COUPLING WITH NEW.Nov 9, 2023 · N348D · Magneto/DistributorSDR 2024FA0000057Rivet · looseMAGNETO P/N 4371 S/N 21091251. LOOSE RIVETS FOUND ON IMPULSE COUPLING DURING 500 HOUR INSPECTION. REPLACED IMPULE COUPLING WITH NEW.Oct 18, 2023 · N935G · Magneto/DistributorSDR 2024FA0000055Rivet · looseMAGNETO P/N 66GC20SFNN S/N 21080300. LOOSE RIVETS FOUND ON IMPULSE COUPLING DURING 500 HOUR INSPECTION. REPLACED IMPULE COUPLING WITH NEW.Sep 13, 2023 · N792A · Magneto/DistributorSDR 2023FA0000528Unknown · unknownPILOT REPORTS THAT THE INITIAL MAGNETO CHECK, THE ENGINE WAS RUNNING ROUGH, ON SECOND MAGNETO CHECK ENGINE SMOOTH OUT. ON TAKE OFF THE ENGINE POWER FLUCTUATED AND AIRCRAFT DID NOT MAKE POWER. PILOT ABORTED TAKE-OFF. WE PERFORMED A VISUAL INSPECTION OF THE ENGISep 8, 2023 · N792A · Piper PA28181 · Ignition SystemSDR 2023FA0000494Impulse Coupling · looseFOUND MAGNETO IMPULSE COUPLING RIVETS LOOSE AND REPLACED WITH NEW IMPULSE COUPLING.Aug 18, 2023 · N151G · Magneto/DistributorSDR 2023FA0000493Impulse Coupling · looseFOUND MAGNETO IMPULSE COUPLING RIVETS LOOSE AND REPLACED WITH NEW IMPULSE COUPLING.Aug 10, 2023 · N147G · Magneto/DistributorSDR 2023FA0000491Impulse Coupling · looseFOUND MAGNETO IMPULSE COUPLING RIVETS LOOSE AND REPLACED WITH NEW IMPULSE COUPLING.Jul 6, 2023 · N412A · Magneto/DistributorSDR 2023FA0000492Impulse Coupling · looseFOUND MAGNETO IMPULSE COUPLING RIVETS LOOSE AND REPLACED WITH NEW IMPULSE COUPLING.Jul 6, 2023 · N219A · Magneto/DistributorSDR 2023FA0000490Impulse Coupling · looseFOUND MAGNETO IMPULSE COUPLING RIVETS LOOSE AND REPLACED WITH NEW IMPULSE COUPLING.Jun 30, 2023 · N991A · Magneto/DistributorSDR 2023FA0000210Impulse Coupling · looseMAGNETO IMPULSE COUPLING RIVETS FOUND LOOSE, REPLACED COUPLING WITH NEW.Apr 7, 2023 · N386D · Ignition SystemSDR 2023FA0000208Impulse Coupling · looseMAGNETO IMPULSE COUPLING RIVETS FOUND LOOSE, REPLACED COUPLING WITH NEW.Apr 5, 2023 · N358G · Ignition SystemSDR 2023FA0000197Impulse Coupling · looseENGINE LEFT MAGNETO IMPULSE COUPLING RIVETS FOUND BENT, REPLACED IMPULSE COUPLING WITH NEW.Mar 15, 2023 · N449A · Ignition SystemSDR 2023FA0000196Impulse Coupling · looseENGINE LEFT MAGNETO IMPULSE COUPLING RIVETS FOUND LOOSE, REPLACED IMPULSE COUPLING WITH NEW.Mar 14, 2023 · N877G · Ignition SystemSDR 2023FA0000191Impulse Coupling · looseENGINE LEFT MAGNETO IMPULSE COUPLING RIVETS FOUND BENT, REPLACED IMPULSE COUPLING WITH NEW.Mar 13, 2023 · N394D · Ignition SystemSDR 2023FA0000131Impulse Coupling · defectiveMAGNETO IMPULSE COUPLING FOUND TO HAVE LOOSE RIVETS, REPLACED IMPULSE COUPLING WITH NEW.Mar 3, 2023 · N592K · Ignition SystemSDR 2023FA0000097Battery Pack · mismanufacturedA NEW ARTEX ELT WITH A NEW BATTERY WAS INSTALLED IN THE AIRCRAFT ON 8/16 AND THE BATTERY PACK LABEL HAD A MANUFACTURE DATE OF 5/16 AND AN EXPIRATION DATE OF 10/23. UPON ROUTINE INSPECTION ON 2/23, THE BATTERY DID NOT HAVE ENOUGH ENERGY TO PASS ITS INTERNAL TESFeb 22, 2023 · N12492 · Cessna 172M · Emergency Locator BeaconSDR 2023FA0000339Attach Bolt · looseALL 4 BOLTS HOLDING VERTICAL STABILIZER SPAR TO REAR BULKHEAD WERE LOOSE. I SAW BLACK ALUMINUM DUST AROUND THE LOWER TWO DURING A ROUTINE INSPECTION. I REMOVED THE BOLTS AND DID NOT FIND SIGNIFICANT WEAR ON THE STRUCTURES. THE NUTS HAD TORQUE STRIPE ON THEM, CFeb 14, 2023 · N28AU · Piper PA28181 · Vertical StabilizerSDR 2023FA0000192Impulse Coupling · looseENGINE LEFT MAGNETO IMPULSE COUPLING RIVETS FOUND LOOSE, REPLACED IMPULSE COUPLING WITH NEW.Feb 1, 2023 · N485A · Ignition SystemSDR 2023FA0000056Impulse Coupling · defectiveENGINE LEFT MAGNETO MODEL 4371 S.N. 21090440, FOUND IMPULSE COUPLING RIVETS LOOSE. REPLACED IMPULSE COUPLINGJan 24, 2023 · N598A · Magneto/DistributorSDR 2023FA0000054Rotor Shaft · defectiveENGINE RIGHT MAGNETO MODEL 4370 S.N. 21011028, FOUND ROTOR SHAFT SHEARED AT BALL BEARING. REPLACED MAGNETO WITH NEW.Jan 4, 2023 · N869G · Magneto/DistributorSDR 2023FA0000053Impulse Coupling · defectiveENGINE LEFT MAGNETO MODEL 4371 S.N. 21080467, FOUND IMPULSE COUPLING P/N M3163 TO HAVE LOOSE RIVETS. REPLACED WITH NEW.Dec 30, 2022 · N952A · Magneto/DistributorSDR 2023FA0000195Impulse Coupling · looseENGINE LEFT MAGNETO IMPULSE COUPLING RIVETS FOUND LOOSE, REPLACED IMPULSE COUPLING WITH NEW.Dec 9, 2022 · N676A · Ignition SystemSDR 2022FA0000749Impulse Coupling · looseDURING 500HR MAGNETO INSPECTION FOUND MAG 4371, S.N. 18071029 IMPULSE COUPLING RIVETS LOOSE. REPLACED IMPULSE COUPLING WITH NEW.Dec 6, 2022 · N710A · Magneto/DistributorSDR 2022FA0000748Impulse Coupling · looseDURING 500HR MAGNETO INSPECTION FOUND MAG 4371, S.N. 21080836 IMPULSE COUPLING RIVETS LOOSE. REPLACED IMPULSE COUPLING WITH NEW.Dec 1, 2022 · N861P · Magneto/DistributorSDR 2022FA0000747Impulse Coupling · looseDURING 500HR MAGNETO INSPECTION FOUND MAG 4371, S.N. 19080251 IMPULSE COUPLING RIVETS LOOSE. REPLACED IMPULSE COUPLING WITH NEW.Nov 30, 2022 · N547K · Magneto/DistributorSDR 2023FA0000194Impulse Coupling · looseENGINE LEFT MAGNETO IMPULSE COUPLING RIVETS FOUND LOOSE, REPLACED IMPULSE COUPLING WITH NEW.Nov 22, 2022 · N845G · Ignition SystemSDR 2022FA0000709Impulse Coupling · looseSLICK MAG P/N 4371, S.N. 21071346 FOUND LOOSE RIVETS ON IMPULSE COUPLING DURING INSPECTION, REPLACED IMPULSE COUPLING WITH NEW.Nov 18, 2022 · N684A · Magneto/DistributorSDR 2022FA0000710Impulse Coupling · looseSLICK MAG P/N 4371, S.N. 20120811 FOUND LOOSE RIVETS ON IMPULSE COUPLING DURING INSPECTION, REPLACED IMPULSE COUPLING WITH NEW.Nov 18, 2022 · N487A · Magneto/DistributorSDR 2022FA0000720Impulse Coupling · looseSLICK MAG P/N 4371, S.N. 18110538 FOUND LOOSE RIVETS ON IMPULSE COUPLING DURING INSPECTION, REPLACED IMPULSE COUPLING WITH NEW.Nov 17, 2022 · N514A · Magneto/DistributorSDR 2022FA0000719Impulse Coupling · looseSLICK MAG P/N 4371, S.N. 21030576 FOUND LOOSE RIVETS ON IMPULSE COUPLING DURING INSPECTION, REPLACED IMPULSE COUPLING WITH NEW.Nov 7, 2022 · N731AC · Magneto/DistributorSDR 2022FA0000618Muffler · crackedNEWLY "OVERHAULED" MUFFLER CRACKED AFTER ONLY 81.3 HOURS OF OPERATION. VISIBLE INDICATION OF FAILURE WAS EXHAUST SOOT ON THE EXTERIOR OF THE MUFFLER SHROUD. MUFFLER WAS SOLD AS OVERHAULED WITH FORM 8130-3 AND WORK ORDER WHILE ALL PARTS APPEARED TO BE MANUFACTUOct 21, 2022 · N7374E · Cessna 172N · Engine Exhaust SystemSDR 2022FA0000722Impulse Coupling · looseSLICK MAG P/N 4371, S.N. 20060297 FOUND LOOSE RIVETS ON IMPULSE COUPLING DURING INSPECTION, REPLACED IMPULSE COUPLING WITH NEW.Oct 19, 2022 · N384G · Magneto/DistributorSDR 2022FA0000721Impulse Coupling · looseSLICK MAG P/N 4371, S.N. 21091251 FOUND LOOSE RIVETS ON IMPULSE COUPLING DURING INSPECTION, REPLACED IMPULSE COUPLING WITH NEW.Oct 12, 2022 · N935G · Magneto/DistributorSDR 2022FA0000736Bushing · unsecureENGINE STOP UNCOMMANDED WHILE TAXIING BACK TO MY HANGAR AT MY HOME AIRPORT. DISCOVERED AFTER REMOVING ACCESSORY CASE THAT THE IDLER GEAR BRONZE BUSHING FELL OUT AND CRANKSHAFT GEAR PIN/DOWEL WAS SHEARED OFF AND CRANKSHAFT GEAR AND BOLT WERE LOOSE AND THE TAB OOct 1, 2022 · N9825W · Engine (Reciprocating)SDR 2022FA0000183Carburetor · looseWHERE THE 2 HALVES MEET AND MATE. THE SCREWS HOLDING THEM TOGETHER WERE STILL LOCKED INTO POSITION BY SPECIAL DEVICES. BUT THE HALVES HAD SOME SLIGHT MOVEMENT THAT ALLOWED A SMALL AMOUNT OF FUEL TO LEAK OUT OF THIS POINT. I DID NOT DISASSEMBLE THIS UNIT, BUT IApr 1, 2022 · N2231Y · Piper PA28181 · Fuel Control/Reciprocating EnginesSDR FQAR20210603003Capacitor · brokenDURING RUN UP FOUND RT MAG DEAD, REMOVED MAG AND OPENED UP, FOUND TERMINAL ON CAPACITOR LEAD BROKEN, MAG HAD 138HRS SINCE A 500HR INSPECTION.Jun 3, 2021 · N823PA · Piper PA28181 · Magneto/DistributorSDR 2020FA0000530Control Cable · bindingAPPROXIMATELY 20 HOURS AFTER ANNUAL, THE VERNIER MIXTURE CONTROL BECAME VERY STIFF. THERE WERE NO KNOWN ANOMALIES OR WEAR NOTED AT THE ANNUAL. DUE TO THE AGE OF THE PART, IT WAS REPLACED. UPON, DISASSEMBLY THE VERNIER PART OF THE CONTROL APPEARED TO STILL WDec 10, 2020 · N5907E · Cessna 172 · Mixture ControlSDR 2020FA0000506Impulse Coupling · damagedRIVETS LOOSE ON IMPULSE COUPLING PAWLS ON SERIAL RANGE OUTSIDE OF S.B.2-19A.Nov 18, 2020 · N526G · Piper PA28181 · Magneto/DistributorSDR 2020FA0000450Magneto · inoperativeFOUND LOOSE RIVETS ON MAGNETO S/N 18060695 IMPULSE COUPLING. SLICK SB2-19 WAS PREVIOUSLY COMPLIED WITH ON 10/30/2019 AND NEW UNAFFECTED IMPULSE COUPLING HAD BEEN INSTALLED AT THAT TIME. THE PROBLEM FOUND IS THAT NEW IMPULSE COUPLING UNAFFECTED BY SB2-19 STILOct 15, 2020 · N931G · Piper PA28181 · Magneto/DistributorSDR FQAR20200916008Muffler · deformedDURING AN INSPECTION BOTH MUFFLERS WERE FOUND WITH HEAT DEFORMATIONS UNDER THE CABIN HEAT SHROUD.Sep 13, 2020 · N545MA · Piper PA28181 · Engine Noise SuppressorSDR FQAR20200916009Muffler · deformedDURING AN INSPECTION BOTH MUFFLERS WERE FOUND WITH HEAT DEFORMATIONS UNDER THE CABIN HEAT SHROUD.Sep 5, 2020 · N746PA · Piper PA28181 · Engine Noise Suppressor
Back to Lycoming O-360-A4M