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.
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
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 CA990330020Spring · broken(CAN) MAINTENANCE NOTICED A LACK OF TENSION ON RUDDER CABLES DURING INSPECTION. CAUSE WAS NOTED AS THE FAILURE OF THE RUDDER RETURN SPRING (LEFT).SDR 99ZZZX1603Screw · looseBOTH DISTRIBUTOR BLOCK SCREWS AND BREAKER POINT PIVOT SCREW FOUND LOOSE DURING FIRST 500-HOUR INSPECTION.SDR 99ZZZX1072Exhaust Valve · failedENGINE RAN ROUGH IN-FLIGHT. CHECKED ENGINE CYLINDER COMPRESSION, FOUND NR 2 CYLINDER HAS NO COMPRESSION. REMOVED CYLINDER AND FOUND BAD EXHAUST VALVE. INSTALLED AND OVERHAULED CYLINDER. ENGINE RUN-UP GOOD.SDR 99ZZZX1000Oil Cooler · crackedON PRE-FLIGHT INSPECTION, PILOT REPORTED THE AIRPLANE ENGINE WAS LEAKING OIL. THE AIRPLANE WAS BROUGHT INTO THE MAINTENANCE SHOP FOR FURTHER INSPECTION AND IT WAS DISCOVERED THE OIL COOLER HAD CRACKED AT THE LOWER OIL COOLER HOSE ATTACH FITTING. CAUSE UNKNOWSDR 99ZZZX300Pump · mismanufacturedFAA-PMA'D PART OUT OF BOX FAILURE. DEAD SHORT INTERNAL. PUMP SUPPLIED BY: PMA PRODUCTS, INC., LIBERTY, NC 27298.SDR CA981109018Blade · damaged(CAN) PROPELLER RECEIVED FOR CORROSION INSPECTION. STONE DAMAGE WAS FOUND ON THE BLADES LEADING EDGES AND FACES.SDR 98ZZZX3414Bowl · crackedCARBURETOR BOWL ASSY (PN 10-3075) FOUND CRACKED NEAR THROTTLE BODY TO BOWL ATTACH SCREW BOSS ON THE LEFT SIDE OF THE BOWL ASSEMBLY. THE CRACK IS APPROXIMATELY .50 INCH IN LENGTH AND APPEARS TO BE CASTING FLAW. THIS CRACK ALLOWED FUEL TO SEEP FROM THE CARBURESDR CA981006014Blade · damaged(CAN) PROPELLER RECEIVED FOR CORROSION INSPECTION. INSPECTION FOUND STONE DAMAGE TO THE LEADING EDGES AND THE FACE OF THE PROPELLER BLADES.SDR CA980814007Exhaust Valve · failed(CAN) ENGINE STARTED RUNNING ROUGH AND LOSING POWER, SO AIRCRAFT LANDED. POST-FLIGHT INSPECTION FOUND THE NR 2 CYLINDER EXHAUST VALVE BROKEN AT THE STEM. COMPRESSION CHECK OF ALL CYLINDERS WAS LOW. ALL CYLINDERS WERE REMOVED. NR 1, NR 3, AND NR 4 CYLINDERSSDR AU980838Rib · corroded(AUS) LT AND RT WING NR 2 NOSE RIBS LOCATED AT STN 32.75 ADJACENT TO THE LEADING EDGE CABIN AIR DUCTS SEVERELY CORRODED. PART TOTAL CYCLES: 12,704.SDR AU980843Skin · cracked(AUS) LEFT WING UPPER SKIN CRACKED IN THREE PLACES ADJACENT TO THE RIVETS SECURING THE SKIN TO THE WING RIB AT STN 100.0. MAXIMUM LENGTH OF CRACKS 4 MM (0.157 INCHES). PART TOTAL CYCLES: 12,704.SDR AU980844Skin · cracked(AUS) RIGHT WING UPPER SKIN CRACKED IN THREE PLACES ADJACENT TO THE RIVETS SECURING THE SKIN TO THE WING RIB AT STN 100.0. MAXIMUM LENGTH OF CRACKS 4 MM (0.157 INCHES). PART TOTAL CYCLES: 12,704.SDR AU980848Skin · cracked(AUS) LEFT WING UPPER SKIN CRACKED IN THREE PLACES IN AREA ADJACENT TO RIVETS SECURING THE SKIN TO WING RIBS AT STN 100.0. CRACK LENGTHS 4 MM (0.157 INCHES). PART TOTAL CYCLES: 12,650.SDR AU980849Skin · cracked(AUS) RIGHT WING UPPER SKIN CRACKED IN TWO PLACES IN AREA ADJACENT TO RIVETS ATTACHING SKIN TO WING RIB AT STN 100.0. MAXIMUM CRACK LENGTH 3MM (0.118 INCHES). PART TOTAL CYCLES: 12,650.SDR AU980851Rib · corroded(AUS) LEFT AND RIGHT WING NR 2 NOSE RIBS LOCATED AT STN 32.75 ADJACENT TO THE LEADING EDGE CABIN AIR DUCTS SEVERELY CORRODED. PART TOTAL CYCLES: 12,650.SDR 98ZZZX2440Bearing · looseFOUND BEARING HOUSING AT BASE OF YOKE LOOSE. HOUSING IS PRESSED IN. A WELD MAY PREVENT THIS.SDR AU980491Dowel · sheared(AUS) CRANKSHAFT ACCESSORY DRIVE GEAR POSITIONING DOWEL SHEARED. AIRCRAFT SUFFERED A LOSS OF POWER AND WAS DAMAGED DURING A FORCED LANDING. ENGINE HAD SUFFERED A PROPELLER STRIKE PRIOR TO THE LAST OVERHAUL AT WHICH THE DOWEL PIN WAS INSPECTED BUT NOT REPLACESDR 98ZZZX1626Ring Gear · wrong partDURING ROUTINE INSPECTION, MECHANIC NOTICED THERE WAS ABNORMAL AMOUNT OF WEAR ON THE STARTER RING GEAR FOR ONLY HAVING 43 HOURS TT ON THE PART. UPON FURTHER INSPECTION, FOUND THE WRONG P/N RING GEAR INSTALLED. THE CORRECT RING GEAR IS P/N 72566 WHICH IS FOR SDR AU980394Crankcase · defective(AUS) ENGINE CRANKCASE TUNNEL MEASUREMENTS OUT OF LIMITS.SDR 98ZZZX1715Piston · crackedDURING A ROUTINE OIL CHANGE, THE SUMP SCREEN WAS INSPECTED, FOUND A PEA SIZE PIECE OF CAST ALUMINUM. IT TURNED OUT TO BE A PIECE OF CYLINDER NR 3 PISTON SKIRT. ALSO, FROM THIS BROKEN-OUT PIECE, FROM THE CENTER OF THE BREAK, WAS A .50 INCH CRACK RADIATING UP SDR 98ZZZX972Carburetor · defectiveINSPECTION OF THE CARBURETOR DETERMINED THE THROTTLE ARM BECAME LOOSE ON THE SHAFT. THIS CONDITION RESULTED IN LOSS OF CONTROL OF ENGINE RPM. THE NUT AND COTTER PIN WERE INTACT. SUSPECT THE ORIGINAL INSTALLATION WAS NOT PROPERLY INSTALLED AND TORQUED ALLOWISDR AU980075Washer · worn(AUS) CARBURETTOR MIXTURE SHAFT RETAINING RING WORN AND LOOSE ALLOWING THE MIXTURE SHAFT TO MOVE FROM ITS NORMAL POSITION. THIS CAUSED A RICH CUT WHEN THE ENGINE WAS BROUGHT BACK TO IDLE FOR LANDING.SDR 98ZZZX348Cylinder · crackedPILOT EXPERIENCED ROUGH ENGINE OPERATION AND RETURNED TO AIRPORT WITH UNEVENTFUL LANDING. INSPECTION BY MAINTENANCE PERSONNEL DISCOVERED NR 4 CYLINDER HAD ZERO COMPRESSION. CYLINDER WAS REMOVED AND FORWARDED TO ENGINE OVERHAUL SHOP WHERE FURTHER INSPECTION RSDR 97ZZZX4952Nut · missingALL FOUR NUTS, FLAT AND LOCK WASHERS, WERE DISCOVERED MISSING FROM THE FOUR STUDS ON THE INTAKE MANIFOLD THAT THE CARBURETOR IS MOUNTED ON. PROBLEM DISCOVERED WHEN ENGINE FAILED ON LANDING AND WOULD NOT RESTART. CURRENT COMBINATION OF NUT, LOCK WASHER AND FLSDR 97ZZZX4445Alternator · failedINSTALLED ELECTROSYSTEMS ALTERNATOR. PART FAILED 42 HOURS LATER. SUBMITTER STATED SERVICE LIFE OF OVERHAULED UNIT SHOULD BE SLIGHTLY BETTER THAN 42 HOURS.SDR 97ZZZX4265Pin Plug · failedPISTON PIN PLUG FAILURE DUE TO PISTON PIN MIGRATION FORCING THE PLUG TO THE BARREL WALL. UPON ZERO COMPRESSION CHECK, REMOVED CYLINDER AND PLUG WAS FOUND IN A SMALL BALL RIDING WITHIN THE PISTON PIN. BOTH COMPRESSION RINGS AND OIL CONTROL RING DAMAGED ALONG SDR 97ZZZX3973Coil · failedSUBMITTER STATES IT IS COMMON FOR THE M3525 ORANGE MAGNETO COILS TO FAIL. THE REPLACEMENT COILS ARE BLACK M3975 OR K3975 AND HAVE BEEN AVAILABLE FOR A FEW YEARS.SDR 97ZZZX4440Float · leaksDURING A RUN-UP PRIOR TO FLIGHT, SMOKE WAS SEEN COMING OUT OF THE COWLING. THE FIRE THAT FOLLOWED CAUSED SUBSTANTIAL DAMAGE TO THE AIRCRAFT FIREWALL FORWARD. THE ENGINE WAS SENT TO THIS FACILITY FOR INSPECTION AND REPAIR RELATED TO DAMAGE FROM THE FIRE. DURSDR 97ZZZX3099Throttle Arm · jammedMISALIGNMENT OF THE RIGGING OF THE THROTTLE ARM TO THE CARBURETOR (IN 1994) CAUSED THE THROTTLE ARM TO JAM PREVENTING THE ENGINE FROM ACCELERATING.SDR 97ZZZX2917Lever · separatedWHILE ON APPROACH TO CAK, PILOT LOST THROTTLE CONTROL, AND , SUBSEQUENTLY, LANDED IN AN OPEN FARM FIELD. INVESTIGATION REVEALED THAT THE THROTTLE CONTROL LEVER WAS LOOSE EVEN THOUGH THE CASTLE NUT AND COTTER PIN WERE FAIRLY TIGHT AND INTACT. SUSPECT IMPROPERSDR AU970608Air Box · blocked(AUS) CARBURETTOR AIR BOX PARTIALLY BLOCKED BY MUD HORNETS NEST - EVIDENCE OF HORNET IN CARBURETTORSDR 97ZZZX2797Crankcase · brokenRIGHT CRANKCASE LOWER FRONT ALTLERNATOR SUPPORT MOUNT LUG BROKE OUT OF CRANKCASE AND LEFT A HOLE 1.50 INCHES IN DIAMETER. CAUSE UNKNOWN. CREATED OIL LEAK WITH OIL ON WINDSHIELD DURING FLIGHT. REMOVED ENGINE AND INSTALLED LYCOMING REBUILT.SDR AU970614Condenser · failed(AUS) RH MAGNETO CONDENSER OPEN CIRCUITSDR AU970451Spinner · missing(AUS) PROPELLER SPINNER DOME SEPARATED - SPINNER RETAINING SCREWS WERE INTACT - SPINNER DOME IS OF FIBREGLASS CONSTRUCTIONSDR 97ZZZX1834Rotor Shaft · brokenMAGNETO ROTOR SHAFT SHEARED .25 INCH BELOW CAM. SUBMITTER RECOMMENDS VISUAL INSPECTION OF SHAFT AT DISASSEMBLY.SDR 97ZZZX358Rotor · brokenPERFORMED NORMAL RUN-UP PROCEDURES AND FOUND RIGHT MAG INOP. DISASSEMBLED MAG AND FOUND ROTOR GEAR AND END OF ROTORSHAFT LOOSE IN MAG. POSSIBLE DEFECTIVE ROTOR MANUFACTURE OR MACHINING OF SLOT FOR CAM.SDR 96ZZZX4371Cylinder · crackedCYLINDER CRACKED FROM TOP SPARK PLUG HOLE AROUND SIDE TO BOTTOM SPARK PLUG HOLE. AIRCRAFT LANDED SAFELY WITHOUT FURTHER PROBLEMS (LOSS OF RPM). ENGINE TT, 2,601.4 HOURS. TSMOH: 607.7 HOURS. SUBMITTER STATED THIS IS THE THIRD CRACKED CYLINDER ON THIS AIRCRSDR AU960940Rotor · broken(AUS) MAGNETO ROTOR SHAFT FAILED AT THE CONTACT BREAKER END AT BASE OF CUTOUT FOR FIBRE CAM CAUSING TOTAL FAILURE OF MAGNETO - UNIT HAD OPERATED FOR 312 HRS SINCE INSPECTION IAW AD/ELEC/48SDR AU960858Connecting Rod · failed(AUS) NO3 CYLINDER CONNECTING ROD FAILED IN AREA APPROXIMATELY HALF WAY BETWEEN THE BIG END AND THE GUDGEON PIN BUSHING - FAILURE INVESTIGATION FOUND EVIDENCE OF A PRE-EXISTING FLAW IN THE PISTON PIN BEARING HOUSING WHICH WAS HEAVILY OXIDISEDSDR CA960604002Bearing Cap Assy · failed(CAN)ENGINE ROUGH ON RUN UP. MAGNETO SEPARATED FROM ENGINE AND HANGING FROM HARNESS. MAGNETO SEIZED AND MOUNTING FLANGE FRACTURED. ROTOR SHAFT SEIZED DUE TO BEARING FAILURE ENSUING FROM OUTER RACE OF BEARING SPINNING WITHIN THE BEARING CAP ASSEMBLY. BEARING CSDR 96ZZZX2888Coil · failedAFTER FLIGHT, ENGINE WOULD NOT START. BOTH MAGNETOS FOUND TO BE INOPERATIVE, NO SPARK. IT HAS BEEN FOUND THAT ONE MAG GOES INOP. ENGINE STARTS ON THE GOOD ONE, UNTIL IT FAILS. AFTER THE ENGINE RPM MEETS OR EXCEEDS 600 RPM, THESE COILS WILL MAG CHECK OK. ISDR 96ZZZX2889Coil · failedAFTER FLIGHT, ENGINE WOULD NOT START. BOTH MAGNETOS FOUND TO BE INOPERATIVE, NO SPARK. IT HAS BEEN FOUND THAT ONE MAG GOES INOP. ENGINE STARTS ON THE GOOD ONE, UNTIL IT FAILS. AFTER THE ENGINE RPM MEETS OR EXCEEDS 600 RPM, THESE COILS WILL MAG CHECK OK. ISDR 96ZZZX3358Venturi · fracturedDURING INSPECTION FOR OVERHAUL, VENTURI WAS FOUND BROKEN AT 3 SUPPORT LEGS AT CENTER OF THE VENTURI.SDR AU960786Battery · overheat fire(AUS) BATTERY CAUGHT FIRE DUE TO INCORRECT STARTING TECHNIQUE - START HELD ON CONTINUOUSLY - PERSONNEL ERRORSDR 96ZZZX2371Cylinder · failedNR 3 CYLINDER BARREL BROKEN. BARREL FAILED 75 PERCENT OF RADIUS ABOUT 2 INCHES DOWN FROM TOP OF CYLINDER BARREL.SDR 96ZZZX2176Retainer · crackedPUSHROD TUBE ON NR 2 CYLINDER INTAKE HAS A PERSISTENT OIL LEAK NEAR THE CRANKCASE. WHEN CHANGING THE PUSHROD TUBE SEAL THIS TIME, THE PUSHROD TUBE RETAINER WHICH IS PRESSED INTO THE CRANKCASE WAS FOUND CRACKED ABOUT ONE-FOURTH OF THE WAY AROUND THE CIRCUMFERESDR 96ZZZX1708Magneto · failedIMPULSE COUPLING FAILED CAUSING SEIZURE OF MAGNETO, BREAKING MAGNETO CASE (SLICK).SDR AU960636Fuel Tank · empty(AUS) ENGINE SURGED DUE TO LACK OF FUELSDR 96ZZZX2294Valve · head separatedENGINE ROUGHNESS DURING FLIGHT FOUND BENT PUSHROD HOUSING AND PUSHROD. REMOVED CYLINDER AND FOUND VALVE HEAD SEPARATED FORM STEM INTAKE SIDE.SDR 96ZZZX853Clamp Nut · missingRIGHT MAGNETO TOP ATTACHMENT MISSING. CLAMP, 66M21195. WASHER, STD-475. WASHER, STD-1727. NUT, STD-1410. RIGHT MAGNETO INSTALLED 10-12-95. TOTAL TIME 168 HOURS. ACFT TT 4,328.5 HOURS.
Back to Lycoming O-360-A4M