# Service difficulty reports: Lycoming O-320-D3G

A list on [Lycoming O-320-D3G](https://openairdocs.org/engine/lycoming-o-320-d3g.md).

Newest first. General aviation reporting is voluntary.

Page 1 of 6 · 279 reports

- [SDR ECPR20260731001](https://openairdocs.org/sdr/ECPR20260731001.md): Spark Plug · cracked · Jul 27, 2026 · N555PU · Piper PA28161 · Spark Plug/Igniter
  > A SPARK PLUG WAS REPLACED DURING A SCHEDULED MAINTENANCE INSPECTION. DURING THE POST-MAINTENANCE OPERATIONAL CHECK, THE ENGINE SUDDENLY DEVELOPED ROUGHNESS AND A PARTIAL LOSS OF POWER. SUBSEQUENT INSPECTION FOUND THE SPARK PLUG HAD COMPLETELY SEPARATED INTO TW
- [SDR ECPR20260624002](https://openairdocs.org/sdr/ECPR20260624002.md): Bracket · corroded · Jun 24, 2026 · N553PU · Piper PA28161 · Wing, Control Surface Attach Fittings
  > THE LEFT WING CENTER FLAP HINGE BRACKET WAS FOUND WITH CORROSION PITTINING THAT WAS BEYOND REWORK LIMITS NECESSITATINING THE REPLACEMENT OF THE BRACKET. THE ORIGIN OF THE CORROSION WAS THE BONDING WIRE ATTACHMENT POINT.
- [SDR ECPR20260624003](https://openairdocs.org/sdr/ECPR20260624003.md): Bracket · corroded · Jun 24, 2026 · N551PU · Piper PA28161 · Wing, Control Surface Attach Fittings
  > THE LEFT WING CENTER FLAP HINGE BRACKET WAS FOUND WITH CORROSION PITTINING THAT WAS BEYOND REWORK LIMITS NECESSITATINING THE REPLACEMENT OF THE BRACKET. THE ORIGIN OF THE CORROSION WAS THE BONDING WIRE ATTACHMENT POINT.
- [SDR ECPR202606004](https://openairdocs.org/sdr/ECPR202606004.md): Bracket · corroded · Jun 24, 2026 · N4445V · Piper PA28161 · Wing, Attach Fittings
  > THE RIGHT WING CENTER FLAP HINGE BRACKET WAS FOUND WITH CORROSION PITTING THAT WAS BEYOND REWORK LIMITS NECESSITATING THE REPLACEMENT OF THE BRACKET. THE ORIGIN OF THE CORROSION WAS THE BONDING WIRE ATTACHMENT POINT.
- [SDR ECPR20260624001](https://openairdocs.org/sdr/ECPR20260624001.md): Bracket · corroded · Jun 23, 2026 · N4426 · Piper PA28161 · Wing, Attach Fittings
  > THE LEFT WING CENTER FLAP HINGE BRACKET WAS FOUND WITH CORROSION PITTINING THAT WAS BEYOND REWORK LIMITS NECESSITATINING THE REPLACEMENT OF THE BRACKET. THE ORIGIN OF THE CORROSION WAS THE BONDING WIRE ATTACHMENT POINT.
- [SDR ECPR2025081833027](https://openairdocs.org/sdr/ECPR2025081833027.md): Valve Guide · out of limits · Aug 14, 2025 · N8578Z · Piper PA28161 · Reciprocating Engine Cylinder Section
  > DURING A SIMULATED ENGINE FAILURE FOR A CFIA LESSON, THE ENGINE EXPERIENCED ROUGHNESS AND PARTIAL POWER LOSS DURING THE PLANNED GO-AROUND AT 800 FEET. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. POST FLIGHT INSPECTION REVEALED
- [SDR 2024FA0000816](https://openairdocs.org/sdr/2024FA0000816.md): Selector Valve · faulted · Nov 5, 2024 · N207AB · Piper PA28161 · Aircraft Fuel System
  > AFTER TAKE OF THE ENGINE LOSS POWER AND AFTER FURTHER INVESTIGATION WE DETERMENT THAT THE FUEL SELECTOR VALVE WAS CLOSING THE FUEL WHILE IT WAS ON THE LEFT TANK POSITION CAUSING THE ENGINE TO SHUT DOWN.
- [SDR 2023FA0000799](https://openairdocs.org/sdr/2023FA0000799.md): Rotor Shaft · broken · Nov 30, 2023 · N8137Q · Piper PA28161 · Magneto/Distributor
  > THE AIRCRAFT TAXIED OUT TO FLY. THE PILOT DID HIS RUN UP AND FOUND THE ENGINE WOULD NOT RUN ON JUST THE RIGHT MAGNETO. PILOT RETURNED AIRCRAFT AND DID NOT FLY. I CONFIRMED THE DISCREPANCY AFTER A RUN UP. I REMOVED AND DISASSEMBLED THE MAGNETO AND FOUND THE RO
- [SDR 2023FA0000683](https://openairdocs.org/sdr/2023FA0000683.md): Cylinder Head · cracked · Oct 26, 2023 · N8352D · Piper PA28161 · Reciprocating Engine Cylinder Section
  > DURING CRUISE PILOT SENSED A "POP" ENGINE BEGAN RUNNING ROUGH WITH POWER LOSS. DECLARED EMERGENCY, DIVERTED, LANDED WITHOUT INCIDENT. INVESTIGATION FINDS #2 CYLINDER CRACK ACROSS TOP SPARK PLUG HOLE. CYLINDER ENGINE COMPONENTS INC. (ECI) PART NUMBER CCST4.1
- [SDR 2023FA0000499](https://openairdocs.org/sdr/2023FA0000499.md): Impulse Coupling · loose · Aug 31, 2023 · N760U · Piper PA28161 · Magneto/Distributor
  > DURING MAG INSPECTION, FOUND RIVITS LOOSE ON BASEPLATE ON BOTH MAGS. REPLACE IMPULSE COUPLINGS WITH NEW
- [SDR 2023FA0000500](https://openairdocs.org/sdr/2023FA0000500.md): Impulse Coupling · loose · Aug 31, 2023 · N730U · Piper PA28161 · Magneto/Distributor
  > LEFT MAG IMPULSE COUPLING RIVITS LOOSE AT BASE PLATE.
- [SDR 2023FA0000501](https://openairdocs.org/sdr/2023FA0000501.md): Impulse Coupling · loose · Aug 31, 2023 · N720U · Piper PA28161 · Magneto/Distributor
  > LEFT MAGNETO IMPULSE COUPLING RIVETS LOOSE IN BASE PLATE
- [SDR 2023FA0000503](https://openairdocs.org/sdr/2023FA0000503.md): Impulse Coupling · loose · Aug 31, 2023 · N780U · Piper PA28161 · Magneto/Distributor
  > MAGNETO IMPULSE COUPLING PAWL RIVETS LOOSE IN BASE PLATE.
- [SDR 2023FA0000502](https://openairdocs.org/sdr/2023FA0000502.md): Impulse Coupling · loose · Aug 17, 2023 · N750U · Piper PA28161 · Magneto/Distributor
  > MAGNETO IMPULSE COUPLING PAWL RIVETS LOOSE ON BASE PLATE.
- [SDR 2023FA0000092](https://openairdocs.org/sdr/2023FA0000092.md): Fuel Bowl · cocked · Feb 17, 2023 · N9250C · Piper PA28161 · Aircraft Fuel Filter/Strainer
  > DISCREPANCY: GASCOLATOR FUEL BOWL FOUND TO BE COCKED OUTBOARD AND RETAINING/TENSION NUT ASSY COCKED INBOARD UPON INITIAL INSPECTION, WITH OUTBOARD RETAINING BAIL DISLODGED FROM GASCOLATOR. SAFETY WIRE ON RETAINING/TENSION NUT CORRECT AND INTACT. LOSS OF DIRECT
- [SDR 2022FA0000649](https://openairdocs.org/sdr/2022FA0000649.md): Propeller · damaged · Oct 5, 2022 · N120BJ · Piper PA28151 · Propeller System
  > DURING THE CLIMB OUT FROM TAKEOFF, THE PILOT REPORTED THE AIRCRAFT BEGAN TO SHAKE VIOLENTLY AND THE THROTTLE AND MIXTURE RETARDED ON THEIR OWN. THE PILOT APPLIED FULL POWER AND MIXTURE AND THE AIRCRAFT CONTINUED TO SHAKE BUT STILL MADE ENOUGH POWER TO TURN BA
- [SDR 2022FA0000451](https://openairdocs.org/sdr/2022FA0000451.md): Carburetor · failed insp · Jul 21, 2022 · Piper PA28161 · Engine (Reciprocating)
  > AFTER LANDING ENGINE QUIT AND WOULD NOT RESTART. FUEL WAS TRAPPED IN CARBURETOR. CARBURETOR INLET SCREEN WAS CLEAN. RETURNED CARB TO AVSTAR FOR EVALUATION. CARBURETOR TESTED AND FAILED FLOAT LEVEL TESTING REQUIREMENT. CARBURETOR NEEDLE AND SEAT ASSEMBLY RE
- [SDR 2022FA0000334](https://openairdocs.org/sdr/2022FA0000334.md): Attach Bolt · broken · Jun 22, 2022 · N161KM · Piper PA28161 · Main Landing Gear Attach Section
  > DURING THE 100 HR / ANNUAL INSPECTION OF THE SUBJECT AIRCRAFT WE FOUND 4 BROKEN BOLTS IN THE LEFT HAND MAIN LANDING GEAR. UPON ARRIVAL OF THE AIRCRAFT FOR INSPECTION ONE BOLT WAS OBSERVED TO BE MISSING A NUT AND PORTION OF THE BOLT WHEREUPON IT WAS DECIDED TO
- [SDR 2022FA0000339](https://openairdocs.org/sdr/2022FA0000339.md): Attach Bolt · broken · Jun 22, 2022 · N161KM · Piper PA28161 · Main Landing Gear Attach Section
  > DURING THE 100 HR / ANNUAL INSPECTION OF THE SUBJECT AIRCRAFT WE FOUND 4 BROKEN BOLTS IN THE LEFT HAND MAIN LANDING GEAR. UPON ARRIVAL OF THE AIRCRAFT FOR INSPECTION ONE BOLT WAS OBSERVED TO BE MISSING A NUT AND PORTION OF THE BOLT WHEREUPON IT WAS DECIDED TO
- [SDR ECPR2022051900001](https://openairdocs.org/sdr/ECPR2022051900001.md): Carburetor · faulty · May 19, 2022 · N4445K · Piper PA28161 · Fuel Control/Reciprocating Engines
  > FOLLOWING A POST-INSPECTION ENGINE RUNUP, FUEL WAS FOUND LEAKING FROM THE CARBURETOR VENTURI. IT IS SUSPECTED THAT AN UNDETERMINED DEFECT IN THE CARBURETOR FLOAT OR ASSOCIATED VALVE ALLOWED THE CARBURETOR BOWL TO OVERFILL AND RESULTED IN FUEL OVERFLOWING INTO
- [SDR ECPR2022042100001](https://openairdocs.org/sdr/ECPR2022042100001.md): Carburetor · faulty · Apr 13, 2022 · N159ND · Piper PA28161 · Fuel Control/Reciprocating Engines
  > DURING DOWNWIND FOR LANDING WITH A SIMULATED POWER LOSS, AN ACTUAL PARTIAL POWER LOSS OCCURRED. PILOT CONTINUED APPROACH AND LANDED WITHOUT FURTHER INCIDENT. DURING THE LANDING ROLLOUT, THE ENGINE QUIT. MAINTENANCE PERSONNEL RESPONDED AND TOWED THE AIRCRAFT FR
- [SDR ECPR2021070990618](https://openairdocs.org/sdr/ECPR2021070990618.md): Carburetor · faulty · Jul 8, 2021 · N555PU · Piper PA28161 · Fuel Control/Reciprocating Engines
  > DURING A POST_ENGINE CHANGE CHECK FLIGHT, PILOT EXPERIENCED VIBRATION AND PARTIAL POWER LOSS. PILOT DECLARED AN EMERGENCY AND LANDED WITHOUT FURTHER INCIDENT. DURING THE LANDING ROLLOUT, THE ENGINE QUIT. MAINTENANCE PERSONNEL RESPONDED AND TOWED THE AIRCRAF
- [SDR 2021FA0000240](https://openairdocs.org/sdr/2021FA0000240.md): Carburetor · leaking · May 6, 2021 · N54MC · Piper PA28161 · Fuel Control/Reciprocating Engines
  > AT AROUND 4:30 LOCAL N54MC ENTERED KDWH AIRSPACE FOR WORK IN THE TRAFFIC PATTERN. AFTER THE 3RD LAP AROUND WE CAME AND LANDED WITH THE INTENT OF GOING BACK, THE THE FLIGHT SCHOOL. AFTER TOUCHDOWN WE STARTED SLOWING DOWN TO EXIT THE RUNWAY. AS SOON AS WE START
- [SDR 2021FA0000056](https://openairdocs.org/sdr/2021FA0000056.md): Pump · failed · Feb 23, 2021 · N2875G · Piper PA28161 · Fuel Boost Pump
  > (REPORTED) MECHANICAL PUMP FAILED DURING CRUISE FLIGHT.
- [SDR ECPR2021012789822](https://openairdocs.org/sdr/ECPR2021012789822.md): Elt · false activation · Jan 26, 2021 · N8575W · Piper PA28161 · Emergency Locator Beacon
  > DURING CRUISE FLIGHT, THE ANNUNCIATOR LIGHT FOR THE ELT WAS OBSERVED TO BE DIMLY LIT. NO SIGNAL WAS HEARD ON 121.5. AFTER LANDING AND SHUTDOWN, THE LIGHT REMAINED ILLUMINATED, SO THE CREW CYCLED THE ELT SWITCH TO REST AND BACK TO ARM ON THE REMOTE CONTROL PA
- [SDR P39A20191216001](https://openairdocs.org/sdr/P39A20191216001.md): Crankshaft · broken · Sep 23, 2019 · N4317B · Piper PA28161 · Reciprocating Engine Power Section
  > PILOTS REPORTED THAT THE AIRCRAFT STARTED RUNNING ROUGH, VIBRATING, LOSS POWER, THEN STOPED. THEY MADE EMERGENCY PERCIEDURES AND LANDED, IN A NEARBY EMPTY CORN FIELD. UPON REMOVAL AND INSPECTION OF THE ENGINE, AFTER REMOVING THE NUMBER FOUR CYLINDER WE DISCOVE
- [SDR 2019FA0000139](https://openairdocs.org/sdr/2019FA0000139.md): Magneto · cracked · Apr 26, 2019 · N8580E · Piper PA28161 · Magneto/Distributor
  > THE LEFT MAGNETO WAS BEING REPLACED DUE TO DIFFICULTY STARTING THE ENGINE. THE TECHNICIAN DISCOVERED A SECTION OF THE MAGNETO MOUNTING FLANGE CRACKED AND SEPARATED AND SEPARATED FROM THE MAGNETO. THE CRACK EXTENDED THROUGH THE UNUSED IMPULSE COUPLING STOP HO
- [SDR 2019FA0000140](https://openairdocs.org/sdr/2019FA0000140.md): Impulse Coupling · broken · Apr 26, 2019 · N8580E · Piper PA28161 · Magneto/Distributor
  > AIRCRAFT WAS DIFFICULT TO START. FOUND LEFT MAGNETO IMPULSE COUPLING PAWL PIVOT PIN SHEARED. REPLACED MAGNETO.
- [SDR 2019FA0000052](https://openairdocs.org/sdr/2019FA0000052.md): Throttle Cable · broken · Mar 4, 2019 · Piper PA28161 · Power Lever
  > AFTER A 50 HOURS INSPECTION, THE INSPECTOR DURING ENGINE RUN-UP ON THE GROUND WITH FULL POWER ACHIEVED. REPORTED NOT TO BE ABLE TO REDUCE RPM TO IDLE. DEFECT WAS TRACED TO BROKEN THROTTLE CABLE INNER CABLE. NEW CABLE FITTED.
- [SDR ECPR2019012582092](https://openairdocs.org/sdr/ECPR2019012582092.md): Contactor · stuck · Jan 21, 2019 · N371DC · Piper PA28161 · Engine Starter
  > DURING TAXI THE CREW SMELLED AND OBSERVED SMOKE IN THE CABIN. THE CREW RETURNED TO THE RAMP. MAINTENANCE FOUND THE STARTER INOPERATIVE. THE STARTER SMELLED OF ELECTRICAL SMOKE. IT IS SUSPECTED THAT THE STARTER CONTACTOR REMAINED IN THE CLOSED POSITION AFTE
- [SDR ECPR2018112181318](https://openairdocs.org/sdr/ECPR2018112181318.md): Cylinder Head · cracked · Nov 20, 2018 · N558PU · Piper PA28161 · Reciprocating Engine Cylinder Section
  > DURING TAKEOFF, ENGINE EXPERIENCED A PARTIAL POWER LOSS. PILOT REMAINED IN THE PATTERN AND LANDED. SUBSEQUENT INSPECTION BY MAINTENANCE PERSONELL FOUND A CRACK IN THE #4 CYLINDER. INSPECTION AFTER REMOVING THE CYLINDER REVEALED THAT A CRACK EXISTED FROM ONE
- [SDR ECPR201809210003](https://openairdocs.org/sdr/ECPR201809210003.md): Cylinder · leaking · Sep 20, 2018 · N371DC · Piper PA28161 · Reciprocating Engine Cylinder Section
  > DURING INSPECTION, DIFFERENTIAL COMPRESSION CHECK FOUND NUMBER FOUR CYLINDER BELOW TOLERANCE. FURTHER EXAMINATION FOUND LEAKAGE AT THE EXHAUST VALVE. CYLINDER HAD 201 HOURS TIME IN SERVICE. CYLINDER WAS REPLACED.
- [SDR ECPR201809110001](https://openairdocs.org/sdr/ECPR201809110001.md): Cylinder · unserviceable · Sep 11, 2018 · N4443Q · Piper PA28161 · Reciprocating Engine Cylinder Section
  > DURING INSPECTION, DIFFERENTIAL COMPRESSION CHECK FOUND NUMBER ONE CYLINDER BELOW SPECIFICATION. SUBSEQUENT EXAMINATION FOUND LEAKAGE AT THE EXHAUST VALVE. CYLINDER WAS REPLACED.
- [SDR ECPR201809110002](https://openairdocs.org/sdr/ECPR201809110002.md): Cylinder · unserviceable · Sep 11, 2018 · N4443Q · Piper PA28161 · Reciprocating Engine Cylinder Section
  > DURING INSPECTION, DIFFERENTIAL COMPRESSION CHECK FOUND NUMBER THREE CYLINDER BELOW TOLERANCE. FURTHER EXAMINATION FOUND LEAKAGE AT THE EXHAUST VALVE. CYLINDER WAS REPLACED.
- [SDR 2020FA0000051](https://openairdocs.org/sdr/2020FA0000051.md): Carburetor · separated · Aug 25, 2018 · N4121J · Piper PA28140 · Fuel Control/Reciprocating Engines
  > REPORTED PROBLEM WAS PARTIAL ENGINE POWER LOSS DURING CLIMB OUT. UPON INSPECTION OF ENGINE AND ACCESSORIES THE CARBURETOR WAS FOUND TO HAVE THE PARTING FLANGE SEPARATING. THE ORIGINAL SCREWS AND LOCKING TAB WASHERS WERE ALL INSTALLED BUT LOOSE. SLIGHT FUEL
- [SDR ECPR2018081480057](https://openairdocs.org/sdr/ECPR2018081480057.md): Cylinder · out of tolerance · Aug 13, 2018 · N44426 · Piper PA28161 · Reciprocating Engine Cylinder Section
  > NUMBER ONE CYLINDER FAILED DIFFERENTIAL COMPRESSION CHECK DURING ROUTINE INSPECTION. FOUND EXCESSIVE LEAKAGE AT EXHAUST VALVE. EXHAUST VALVE SHOWED DISCOLORATION, POSSIBLY FROM OVERHEATING.
- [SDR ECPR2018081079993](https://openairdocs.org/sdr/ECPR2018081079993.md): Cylinder Head · cracked · Aug 8, 2018 · N903FC · Piper PA28161 · Reciprocating Engine Cylinder Section
  > ENGINE NR ONE CYLINDER COMPRESSION WAS FOUND BELOW SPECIFICATION. SUBSEQUENT INSPECTION FOUND A CRACK IN THE CYLINDER HEAD. THE CRACK WAS LOCATED OUTBOARD OF THE INTAKE VALVE SEAT. THE CRACK WAS APPROXIMATELY TWO INCHES LONG AND FOLLOWED THE CURVE OF THE VA
- [SDR NUTR2018071000001](https://openairdocs.org/sdr/NUTR2018071000001.md): Channel · cracked · Jul 9, 2018 · N288MK · Piper PA28161 · Fuselage Main, Attach Fittings
  > WHILE PERFORMING A 100 HOUR INSPECTION FOUND THE LOWER COCKPIT CHANNEL AT FUSELAGE STATION 128.737. CRACKED AND BUCKLED. THIS CHANNEL IS THE CARRY THROUGH STRUCTURE FOR THE AFT WING ATTACH FITTINGS. THERE IS NO OTHER DAMAGE TO WINGS OR FUSELAGE STRUCTURE. THE
- [SDR J4YR201807062007](https://openairdocs.org/sdr/J4YR201807062007.md): Oil Filter · defective · Jul 6, 2018 · N3072 · Piper PA28161 · Reciprocating Engine Oil System
  > UPON REMOVING OIL FILTER DURING ENGINE OIL CHANGE THE OIL FILTER SEEMED TO BE VERY DIFFICULT TO BREAK LOOSE. AFTER EVENTUALLY GETTING THE FILTER REMOVED IT WAS NOTICED THAT THE THREADED STUD WAS STILL THREADED INTO THE ENGINE THOUGH NOT TIGHTLY. THIS WAS A NEW
- [SDR 2018FA0000462](https://openairdocs.org/sdr/2018FA0000462.md): Cylinder · cracked · Apr 6, 2018 · N6655W · Piper PA28140 · Reciprocating Engine Cylinder Section
  > CYLINDER HEAD IS CRACKED. THIS IS THE THIRD CYLINDER ON THIS ENGINE THAT THE HEAD HAS DEVELOPED HOLES IN THEM. THE FIRST WENT AT ABOUT 800 HOURS. WE OPERATE THIS ENGINE IN A FLIGHT SCHOOL. HAPPENED UNDER NORMAL FLIGHT OPERATIONS. PROBABLE CAUSE UNKNOWN.
- [SDR ECPR2018040378590](https://openairdocs.org/sdr/ECPR2018040378590.md): Cylinder Head · cracked · Mar 30, 2018 · N557PU · Piper PA28161 · Powerplant System
  > DURING A SCHEDULED INSPECTION, FOUND THE NR 3 CYLINDER HAD LOW COMPRESSION. INVESTIGATION FOUND THE CYLINDER HEAD WAS CRACKED AROUND THE INTAKE VALVE SEAT AND THROUGH THE CYLINDER HEAD WALL AND OUT BETWEEN THE CYLINDER COOLING FINS.
- [SDR ECPR2018040378436](https://openairdocs.org/sdr/ECPR2018040378436.md): Exhaust Valve · worn · Mar 16, 2018 · N903FC · Piper PA28161 · Reciprocating Engine Cylinder Section
  > DURING A SCHEDULED INSPECTION, FOUND THAT THE NR 4 ENGINE CYLINDER HAD LOW COMPRESSION. INVESTIGATION FOUND THAT THE EXHAUST VALVE FACE AND EXHAUST SEAT INTERFACE SHOWED EXCESSIVE WEAR CAUSING THE EXHAUST VALVE FACE TO CUP.
- [SDR ECPR2018040378460](https://openairdocs.org/sdr/ECPR2018040378460.md): Cylinder Head · cracked · Mar 16, 2018 · N300DC · Piper PA28161 · Reciprocating Engine Cylinder Section
  > DURING A SCHEDULED INSPECTION, FOUND THAT THE NR 4 CYLINDER HAD LOW COMPRESSION. INVESTIGATION FOUND THE CYLINDER HEAD WAS CRACKED AROUND THE INTAKE VALVE SEAT AND THROUGH THE CYLINDER HEAD WALL OUT BETWEEN THE CYLINDER COOLING FINS.
- [SDR ECPR2018031578420](https://openairdocs.org/sdr/ECPR2018031578420.md): Cylinder Head · cracked · Mar 15, 2018 · N552PU · Piper PA28161 · Reciprocating Engine Cylinder Section
  > DURING A SCHEDULED INSPECTION, FOUND THE NR 1 CYLINDER HAD LOW COMPRESSION. INVESTIGATION FOUND THE CYLINDER HEAD WAS CRACKED AROUND THE INTAKE VALVE SEAT AND THROUGH THE CYLINDER HEAD WALL OUT BETWEEN THE CYLINDER COOLING FINS.
- [SDR ECPR2018031278406](https://openairdocs.org/sdr/ECPR2018031278406.md): Cylinder Head · cracked · Mar 12, 2018 · N9218R · Piper PA28161 · Reciprocating Engine Cylinder Section
  > DURING A SCHEDULED INSPECTION, FOUND THE NR 4 CYLINDER HAD LOW COMPRESSION. INVESTIGATION FOUND THE CYLINDER HEAD WAS CRACKED AROUND THE INTAKE VALVE SEAT AND THROUGH THE CYLINDER HEAD WALL OUT BETWEEN THE CYLINDER COOLING FINS.
- [SDR ECPR2018030778354](https://openairdocs.org/sdr/ECPR2018030778354.md): Cylinder Head · cracked · Mar 7, 2018 · N300DC · Piper PA28161 · Reciprocating Engine Cylinder Section
  > DURING A SCHEDULED INSPECTION, FOUND THE NR 2 CYLINDER HAD LOW COMPRESSION. INVESTIGATION FOUND THE CYLINDER HEAD WAS CRACKED AROUND THE INTAKE VALVE SEAT AND THROUGH THE CYLINDER HEAD WALL OUT BETWEEN THE CYLINDER COOLING FINS.
- [SDR ECPR2018030278298](https://openairdocs.org/sdr/ECPR2018030278298.md): Exhaust Valve · damaged · Mar 2, 2018 · N902FC · Piper PA28161 · Reciprocating Engine Cylinder Section
  > DURING A SCHEDULED INSPECTION, FOUND THAT THE NR 1 ENGINE CYLINDER HAD LOW COMPRESSION. INVESTIGATION FOUND THAT THE EXHAUST VALVE FACE AND EXHAUST SEAT INTERFACE SHOWED EXCESSIVE WEAR CAUSING THE EXHAUST VALVE FACE TO CUP.
- [SDR ECPR2018022278197](https://openairdocs.org/sdr/ECPR2018022278197.md): Exhaust Valve · damaged · Feb 22, 2018 · N9218R · Piper PA28161 · Reciprocating Engine Cylinder Section
  > DURING A SCHEDULED INSPECTION, FOUND THAT THE NR 3 ENGINE CYLINDER HAD LOW COMPRESSION. INVESTIGATION FOUND THAT THE EXHAUST VALVE FACE AND EXHAUST SEAT INTERFACE SHOWED EXCESSIVE WEAR, CAUSING THE EXHAUST VALVE FACE TO CUP.
- [SDR ECPR2018032978037](https://openairdocs.org/sdr/ECPR2018032978037.md): Exhaust Valve · damaged · Feb 6, 2018 · N901FC · Piper PA28161 · Reciprocating Engine Cylinder Section
  > DURING A SCHEDULED INSPECTION, FOUND THE NR 4 ENGINE CYLINDER HAD LOW COMPRESSION. INVESTIGATION FOUND THAT THE EXHAUST VALVE FACE AND EXHAUST SEAT INTERFACE SHOWED EXCESSIVE WEAR CAUSING THE EXHAUST VALVE FACE TO CUP.
- [SDR ECPR2018020578024](https://openairdocs.org/sdr/ECPR2018020578024.md): Cylinder Head · cracked · Feb 5, 2018 · N551PU · Piper PA28161 · Reciprocating Engine Cylinder Section
  > DURING A SCHEDULED INSPECTION IT WAS FOUND THAT THE NR 1 CYLINDER HAD LOW COMPRESSION. INVESTIGATION FOUND THE CYLINDER HEAD WAS CRACKED AROUND THE INTAKE VALVE SEAT AND THROUGH THE CYLINDER HEAD WALL OUT BETWEEN THE CYLINDER COOLING FINS.

Next page: https://openairdocs.org/engine/lycoming-o-320-d3g/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 engine_model_key = 'O320D3G'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/engine/lycoming-o-320-d3g/reports

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