# Service difficulty reports: Lycoming O-320-D2G A list on [Lycoming O-320-D2G](https://openairdocs.org/engine/lycoming-o-320-d2g.md). Newest first. General aviation reporting is voluntary. - [SDR T7KR2021080900001](https://openairdocs.org/sdr/T7KR2021080900001.md): Points · excess play · Aug 5, 2021 · Piper PA28* · Magneto/Distributor > POINT CONTACT SHAFT ON CAM ARM IS RIVETED ON. THE RIVET IS NOT TIGHT. THE POINT CONTACT SHAFT IS MOVING WITHIN THE POINT CAM ARM, SO, THE POINT CONTACT DOES NOT RISE WITH THE CAM LOBE. HENCH, NO OPENING OF THE POINTS MEANS NO COLLAPSE OF THE ELECTRICAL FIELD O - [SDR 2020FA0000066](https://openairdocs.org/sdr/2020FA0000066.md): Cylinder Head · cracked · Dec 11, 2018 · N63SA · Cessna 172M · Reciprocating Engine Cylinder Section > APPROXIMATELY 2 INCH RADIAL CRACK IN CYLINDER HEAD ADJACENT TO AND OUTSIDE OF THE INTAKE VALVE. EXTERNAL EVIDENCE OF EXHAUST GASSES ESCAPING FROM CRACK WAS PRESENT AND COMPRESSION TEST PRODUCED FREE FLOW OF SHOP AIR FROM CYLINDER HEAD BETWEEN THE 9TH AND 10TH - [SDR 2020FA0000072](https://openairdocs.org/sdr/2020FA0000072.md): Cylinder Head · cracked · Nov 13, 2018 · N63SA · Cessna 172M · Reciprocating Engine Cylinder Section > APPROXIMATE 1.5 INCH RADIAL CRACK IN CYLINDER HEAD ADJACENT TO AND OUTSIDE OF THE INTAKE VALVE. EXTERNAL EVIDENCE OF EXHAUST GASSES ESCAPING FROM CRACK WAS PRESENT AND COMPRESSION TEST PRODUCED FREE FLOW OF SHOP AIR FROM CYLINDER HEAD BETWEEN THE 9TH AND 10TH - [SDR 2020FA0000071](https://openairdocs.org/sdr/2020FA0000071.md): Cylinder Head · cracked · Mar 9, 2018 · N63SA · Cessna 172M · Reciprocating Engine Cylinder Section > APPROXIMATELY 2 INCH RADIAL CRACK IN CYLINDER HEAD ADJACENT TO AND OUTSIDE OF THE INTAKE VALVE. EXTERNAL EVIDENCE OF EXHAUST GASSES ESCAPING FROM CRACK WAS PRESENT AND COMPRESSION TEST PRODUCED FREE FLOW OF SHOP AIR FROM CYLINDER HEAD BETWEEN THE 9TH AND 10TH - [SDR RTE2016F00000](https://openairdocs.org/sdr/RTE2016F00000.md): Magneto · failed · Aug 10, 2016 · N4793F · Cessna 172N · Magneto/Distributor > MAGNETO FAILED IN FLIGHT, 30.1 HRS TSN 11 DAYS AFTER FIRST INSTALLATION. DID NOT OPEN MAGNETO TO DETERMINE CAUSE OF FAILURE DUE TO MFG WARRANTY LIMITATIONS CONCERNING DISTURBING THE SEAL. MAGNETO BEING RETURNED TO MFG UNDER WARRANTY. - [SDR CA140325005](https://openairdocs.org/sdr/CA140325005.md): Tube · failed · Mar 25, 2014 · Cessna 172N · Tire Tube > (CAN) ACFT EXPERIENCED A FLAT TIRE ON TAXING FOR RUN-UP. INSPECTION FOUND SMALL HOLE IN TUBE, BUT TIRE SHOWED NO DEFECT OR DEBRIS THAT COULD HAVE CAUSED HOLE. - [SDR CA131023008](https://openairdocs.org/sdr/CA131023008.md): Collar · cracked · Oct 21, 2013 · Cessna 172N · Landing Gear Steering System > (CAN) NOSEGEAR STEERING COLLAR DISCOVERED CRACKED DURING SCHEDULED INSPECTION. CRACK THROUGH MAIN COLLAR AT FORWARD GREASE FITTING. SUSPECT OVER STEERING BY GROUND TUG. - [SDR FAA2014022000093](https://openairdocs.org/sdr/FAA2014022000093.md): Screw · loose · Sep 11, 2013 · N701PY · Cessna 172N · Magneto/Distributor > DURING ROUTINE INSPECTION, DISCOVERED LEFT MAGNETO TIMING TO BE ADVANCED 6 DEGREES BEYOND SPECIFICATION. REMOVED MAGNETO TO RESET INTERNAL TIMING AND DISCOVERED HOLD DOWN SCREW LOOSE. THIS WAS THE FIRST MAGNETO TIMING INSPECTION PERFORMED SINCE THE INITIAL - [SDR 2013FA0000352](https://openairdocs.org/sdr/2013FA0000352.md): Retainer · failed · Jun 18, 2013 · N6428D · Cessna 172N · Reciprocating Engine Cylinder Section > AFTER DESCENDING TO 2,500 FT, EXPERIENCED A VIBRATION FOLLOWED BY PARTIAL POWER LOSS. DECLARED AN EMERGENCY. LANDED. MX DETERMINED THAT THE ENGINE EXPERIENCED A NR 2 CYLINDER FAILURE. CYLINDER EXHAUST VALVE SPRING RETAINER FAILED. - [SDR 2012FA0000211](https://openairdocs.org/sdr/2012FA0000211.md): Pawl · loose · Feb 28, 2012 · N739QL · Cessna 172N · Magneto/Distributor > TRIED TO START ACFT, PROP WOULD TURN BUT IMPULSE COUPLING COULD NOT BE HEARD SNAPPING. REMOVED LEFT MAGNETO AND FOUND THAT THE RIVET HOLDING ONE OF THE PAWLS HAD BROKEN OFF AND THE PAWL WAS BEATING THE EDGE OF THE MAGNETO, DESTROYING THE LIP. THERE WAS AL - [SDR 2010FA0001241](https://openairdocs.org/sdr/2010FA0001241.md): Cylinder · cracked · Nov 22, 2010 · N263ND · Piper PA28161 · Reciprocating Engine Cylinder Section > "ON NOVEMBER 13, 2010 AT APPROX NOON, EXPERIENCED AN EMERGENCY. FLYING APPROX 8 MILES NORTHWEST OF AIRPORT AT APPROX 3,000 FT AGL. HAD DEPARTED AIRPORT AT APPROX 11:30 PM. THE ENGINE SUDDENLY BEGAN RUNNING VERY ROUGH CAUSING THE AIRFRAME TO SHAKE SLIGHTLY. - [SDR ECPR466DAA](https://openairdocs.org/sdr/ECPR466DAA.md): Support Angle · cracked · Apr 27, 2010 · N9228X · Piper PA28161 · Fuselage Main, Structure > (ECPR) THE LT AND RT BATTERY BOX SUPPORT ANGLE ASSEMBLIES, PNS 35846-02 & 35846-03, WERE FOUND CRACKED JUST INBD, TOWARDS THE BATTERY BOX, OF THE BOTTOM FIREWALL ATTACH HOLES. THE CRACKS WERE BETWEEN THE ACTUAL HOLE AND THE START OF THE CURVED PORTION OF THE A - [SDR RTE2007F00000](https://openairdocs.org/sdr/RTE2007F00000.md): Bulkhead · cracked · Nov 15, 2006 · N731QQ · Cessna 172N · Propeller Spinner Section > DURING ROUTINE PHASE INSPECTION, FOUND FWD PROP BULKHEAD ASSY TO BE CRACKED IN SEVERAL PLACES, ALL NEAR THE BOLT HOLES AND NEARBY RADIUS. HAVE FOUND SEVERAL IN THE SAME CONDITION ON THIS AND OTHER AC. SUSPECT EITHER IMPROPER HEAT TREATING DURING MFG AND OR I - [SDR 2006FA0000462](https://openairdocs.org/sdr/2006FA0000462.md): Bulkhead · cracked · Mar 16, 2006 · N734QQ · Cessna 172N · Propeller Spinner Section > DURING ROUTINE PHASE INSPECTION FWD PROP BULKHEAD FOUND TO BE CRACKED NEAR SEVERAL MOUNTING BOLT HOLES. HAVE SEEN THIS SEVERAL TIMES BEFORE. SUSPECT DEFECT IN CURRENT MFG PROCESS. (K) - [SDR RTE2006F00002](https://openairdocs.org/sdr/RTE2006F00002.md): Bulkhead · cracked · Dec 15, 2005 · N734QQ · Cessna 172N · Propeller Spinner Section > DURING ROUTINE SCHEDULED INSPECTION. FOUND FWD PROP SPINNER BULKHEAD CRACKED NEAR THE BOLT HOLES. NO APPARENT REASON COULD BE DETERMINED. THE PROP BOLTS WERE CORRECTLY TORQUED. THE PROP WAS CORRECTLY CLOCKED. GROUND AND FLIGHT CHECKS SHOWED NO ABNORMAL VI - [SDR CA040720004](https://openairdocs.org/sdr/CA040720004.md): Alternator · failed · Jul 10, 2004 · Cessna 172N · AC Generator-Alternator > IN CRUISE, THE PILOT NOTICED THAT THE ALTERNATOR FAILED. DECIDED TO LAND AT THE NEAREST AIRPORT. ON SITE, NOTICED THAT THE ALTERNATOR GROUND WIRE WAS CUT AND WAS CONTACTING THE POSITIVE WIRE, WHICH IN TURN CAUSED THE CONTROL BOX TO FAIL. REPLACED THE ALTERN - [SDR CA020913004](https://openairdocs.org/sdr/CA020913004.md): Gps · failed · Aug 20, 2002 · Cessna 172M · Global Positioning System > (CAN) DURING CRUISE PHASE OF, GPS-430 NEW INSTALLATION, TEST FLIGHT, UNIT BECAME UNRESPONSIVE WHEN ENTER BUTTON PUSHED. THE UNIT (GNS-430) AT THAT POINT WOULD NOT CHANGE PAGES. AIRCRAFT LANDED WITH NO FURTHER PROBLEMS. - [SDR CA020808006](https://openairdocs.org/sdr/CA020808006.md): Exhaust Valve · broken · Aug 1, 2002 · Cessna 172N · Reciprocating Engine Cylinder Section > (CAN) AT CRUISING ALTITUDE, THE ENGINE LOST POWER. RPMS DROPPED TO 2000. INSPECTION OF NR 3 CYLINDER, FOUND NO COMPRESSION. THE EXHAUST VALVE WAS FOUND TO BE BROKEN, REPLACED THE CYLINDER. - [SDR 2002FA0000015](https://openairdocs.org/sdr/2002FA0000015.md): Piston · mismanufactured · Oct 24, 2001 · Reciprocating Engine Power Section > DURING INSTALLATION OF NEW PISTON AND RINGS. IT WAS NOTED THAT ONE OF THE PISTONS WOULD ONLY SLIDE INTO THE BARREL HALF WAY. PISTON SKIRT OD WERE CHECKED, OK AT 5.1175 OD. THE PROBLEM WAS FOUND TO BE THE OD OF THE PISTON JUST BELOW THE PISTON PIN WAS MEASUR - [SDR 20010430CW012](https://openairdocs.org/sdr/20010430CW012.md): Housing · cracked · Apr 2, 2001 · N70323 · Cessna 172M · Power Lever > THROTTLE CABLE OUTER HOUSING DETERIORATED AND SEPARATED FROM SWEDGED FITTING AT CLAMP LOCATION AFT OF ENGINE. THIS ALLOWED THE OUTER HOUSING TO MOVE INSTEAD OF THE CARBURETOR CONTROL ARM AS THE THROTTLE CONTROL WAS MOVED. RECOMMEND CABLE REPLACEMENT WHEN ANY - [SDR 99ZZZX3817](https://openairdocs.org/sdr/99ZZZX3817.md): Sleeve · broken · Sep 13, 1999 · N78676 · Cessna 172K · Reciprocating Engine Oil System > REMOVED SUCTION SCREEN DURING OIL CHANGE AND FOUND TWO CHUNKS OF ALUMINUM TRAPPED BY SCREEN. INVESTIGATION FOUND THE PIECES HAD BROKEN OFF THE OIL RELIEF VALVE SLEEVE. REASON FOR FAILURE NOT DETERMINED. THERE IS NOT MUCH STRESS ON THIS PART. - [SDR AU990795](https://openairdocs.org/sdr/AU990795.md): Pin · wrong part · Jul 29, 1999 · Cessna 172N · Shimmy Damper > (AUS) INCORRECT SHIMMY DAMPER PISTON ROLL PIN FITTED. A BRASS SCREW WAS USED INSTEAD OF THE CORRECT STEEL ROLL PIN. THE BRASS SCREW SHEARED CAUSING COMPLETE FAILURE OF THE DAMPER WITH ASSOCIATED NOSE WHEEL SHIMMY. UNAPPROVED PART. - [SDR 99ZZZX2194](https://openairdocs.org/sdr/99ZZZX2194.md): Tube · loose · May 5, 1999 · N84434 · Cessna 172K · Fuel Control/Reciprocating Engines > ACCELERATING PUMP DISCHARGE TUBE CAME OUT AND STRUCK THROTTLE OPEN, STOPPING ENGINE, THEN PART FELL DOWN INTO THE AIRBOX. (THIS OCCURRED IN-FLIGHT AT EFT). - [SDR CA980706007](https://openairdocs.org/sdr/CA980706007.md): Spring · mismanufactured · Jun 19, 1998 · Cessna 172N · Rudder Control System > (CAN) NEW RUDDER SPRINGS INSTALLED AND ON FIRST FLIGHT PILOT COMPLAINED THAT IT TOOK MORE RIGHT RUDDER PEDAL PRESSURE TO KEEP A/C IN STRAIGHT FLIGHT. TENSION CHECK OF NEW SPRING REVEALED THAT THE LEFT SPRING TOOK 3.5 POUNDS TO STRETCH ONE INCH PER MANUFACTURE - [SDR CA980521009](https://openairdocs.org/sdr/CA980521009.md): Discharge Tube · missing · May 13, 1998 · Cessna 172N · Fuel Control/Reciprocating Engines > (CAN) WHILE PRACTICING FORCED APPROACHES, FULL POWER WAS APPLIED FOR A GO-AROUND. THE ENGINE DID NOT RESPOND AND STARTED TO COUGH, POWER WAS REDUCED AND THE AIRCRAFT LANDED. POST-FLIGHT INSPECTION FOUND A SMALL PIECE OF BRASS TUBING IN THE NR 1 SPARK PLUG. - [SDR AU980408](https://openairdocs.org/sdr/AU980408.md): Bulkhead · cracked · Feb 20, 1998 · Cessna 172P · Fuselage Main, Bulkhead > (AUS) LT AND RT LOWER AFT DOOR POST BULKHEADS (PN 0512187-1 LT AND PN 0512187-2 RT) CRACKED. FOUND DURING INSPECTION IAW SB SEB 97-1. PART TC: 5,920. - [SDR CA961216035](https://openairdocs.org/sdr/CA961216035.md): Wheel Half · broken · Dec 4, 1996 · Cessna 172N · Wheel/Ski/Float > (CAN) DURING RAMP CHECK THE RIGHT HAND WHEEL RIM WAS FOUND BROKEN AND MISSING A PIECE. SUBMITTER SUGGESTS THAT PILOT MAY HAVE HIT A RUNWAY LIGHT A FEW DAYS EARLIER. - [SDR 95ZZZX2724](https://openairdocs.org/sdr/95ZZZX2724.md): Magneto · chafed · May 23, 1995 · N4599D · Cessna 172N · Magneto/Distributor > DURING TROUBLESHOOTING OF ELECTRICAL SYSTEM, FOUND LEFT MAGNETO HARNESS CAP CHAFING AIRCRAFT BATTERY. BATTERY COULD NOT BE REMOVED WITHOUT ROTATING MAGNETO OUT OF THE WAY. REMOVED MAGNETO AND ROTATED DRIVE GEAR TO IMPULSE COUPLING 180 DEGREES. REINSTALLED A ## 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 engine_model_key = 'O320D2G' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/engine/lycoming-o-320-d2g/reports --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.