# Service difficulty reports: Lycoming O-235-L2C

A list on [Lycoming O-235-L2C](https://openairdocs.org/engine/lycoming-o-235-l2c.md).

Newest first. General aviation reporting is voluntary.

Page 1 of 11 · 521 reports

- [SDR 8HBR20261010088](https://openairdocs.org/sdr/8HBR20261010088.md): Cylinder Head · rotated · Sep 30, 2026 · N46889 · Cessna 152 · Reciprocating Engine Cylinder Section
  > DURING A ROUTINE ANNUAL INSPECTION CYLINDER #3 HAD OIL LEAKING AND A DAMAGED SEAL ON THE EXHAUST PUSH ROD TUBE. WHILE PERFORMING THE WORK TO REPLACE THE SEAL, THE TECHNICIAN FOUND IT DIFFICULT TO GET THE TUBE SEATED PROPERLY. UPON FURTHER INSPECTION IT APPEARE
- [SDR 8HBR20260426083](https://openairdocs.org/sdr/8HBR20260426083.md): Tappet · separated · Apr 26, 2026 · N5366M · Cessna 152 · Reciprocating Engine Cylinder Section
  > WHILE PERFORMING MAINTENANCE ON THE NR 3 CYLINDER ONE OF THE VALVE TAPPET BODIES SEPARATED.
- [SDR 8HBR20260426081](https://openairdocs.org/sdr/8HBR20260426081.md): Plug · worn · Apr 23, 2026 · N89312 · Cessna 152 · Reciprocating Engine Power Section
  > WHILE COMPLYING WITH LYCOMING SB667A, ONE WRIST PIN PLUG ON CYLINDER #2 WAS FOUND EXCESSIVELY WORN WITH A HOLE IN THE CENTER OF THE PLUG
- [SDR 8HBR20260215076](https://openairdocs.org/sdr/8HBR20260215076.md): Ignition Lead · damaged · Jan 15, 2026 · N49194 · Cessna 152 · Ignition Harness (Distribution)
  > DURING A GROUND RUN A BAD MAGNETO DROP WAS EXPERIENCED ON THE RH MAGNETO. UPON INSPECTION IT WAS FOUND THAT THE RH IGNITION HARNESS #3 LOWER LEAD WAS DEAD.
- [SDR 8HBR20260215073](https://openairdocs.org/sdr/8HBR20260215073.md): Magneto · mismanufactured · Sep 26, 2025 · N89312 · Cessna 152 · Magneto/Distributor
  > PILOT EXPERIENCED A TOTAL ENGINE FAILURE. UPON INSPECTION IT WAS FOUND THAT THE RH MAGNETO WAS ASSEMBLED INCORRECTLY, CAUSING THE DISTRIBUTOR GEAR BRUSH TO ARC TO THE COIL TAB, RESULTING IN A FAILED MAGNETO.
- [SDR 8HBR20260215074](https://openairdocs.org/sdr/8HBR20260215074.md): Magneto · mechanic error · Sep 26, 2025 · N89312 · Cessna 152 · Magneto/Distributor
  > AIRCRAFT EXPERIENCED A TOTAL LOSS OF ENGINE POWER RESULTING IN AN UNSCHEDULED LANDING. AFTER THE RH MAGNETO WAS CHANGED IN THE FIELD THE AIRCRAFT RETURNED TO HOME BASE. UPON FURTHER INVESTIGATION THE LH MAGNETO WAS REMOVED AND INSPECTED, IT WAS FOUND THAT THE
- [SDR 8HBR20240909068](https://openairdocs.org/sdr/8HBR20240909068.md): Gear · damaged · Aug 27, 2024 · N5318M · Cessna 152 · Magneto/Distributor
  > CAM GEAR WAS IMPROPERLY INSTALLED/SEATED DURING MANUFACTURE, WHICH CAUSED EXCESSIVE WEAR AND DAMAGE TO THE CAM GEAR DURING ROTATION AGAINST THE DISTRIBUTOR GEAR. THIS WAS THE FIRST 500HR INSPECTION SINCE THE MAGNETO WAS MANUFACTURED.
- [SDR 8HBR20240909066](https://openairdocs.org/sdr/8HBR20240909066.md): Coil · defective · Jun 5, 2024 · N49276 · Cessna 152 · Magneto/Distributor
  > DURING 500HR INTERNAL INSPECTION OF MAGNETO, COIL TAB WAS FOUND TO HAVE A MANUFACTURING DEFECT AND NOT SYMETRICAL. IT APPEARS THE COIL TAB WAS MACHINE PUNCHED DURING MANUFACTURING AND THE METAL WAS NOT PROPERLY POSITIONED IN THE PUNCH PRESS CAUSING THE METAL C
- [SDR 8HBR20231216054](https://openairdocs.org/sdr/8HBR20231216054.md): Plug · worn · Dec 14, 2023 · N68713 · Cessna 152 · Reciprocating Engine Cylinder Section
  > ALUMINUM SHAVINGS WERE FOUND IN THE OIL FILTER DURING 100HR INSPECTION. FOUND THIS TO BE A RESULT OF ALL PISTON PIN PLUGS BEING WORN ON ALL OF THE CYLINDERS AND THE CYLINDER WALLS HAVING A “RIDGE” AT THE BOTTOM OF THE RING TRAVEL.
- [SDR 8HBR20231216055](https://openairdocs.org/sdr/8HBR20231216055.md): Plug · worn · Dec 11, 2023 · N89226 · Cessna 152 · Reciprocating Engine Cylinder Section
  > ALUMINUM SHAVINGS WERE FOUND IN THE OIL FILTER DURING 100HR INSPECTION. FOUND THIS TO BE A RESULT OF ALL PISTON PIN PLUGS BEING WORN ON ALL OF THE CYLINDERS AND THE CYLINDER WALLS HAVING A “RIDGE” AT THE BOTTOM OF THE RING TRAVEL.
- [SDR 8HBR20231216059](https://openairdocs.org/sdr/8HBR20231216059.md): Plug · worn · Dec 7, 2023 · N177BD · Cessna 152 · Reciprocating Engine Cylinder Section
  > ALUMINUM SHAVINGS WERE FOUND IN THE OIL FILTER DURING 100HR INSPECTION. FOUND THIS TO BE A RESULT OF BOTH PISTON PIN PLUGS BEING WORN ON #1 CYLINDER AND THE CYLINDER WALL HAVING A “RIDGE” AT THE BOTTOM OF THE RING TRAVEL.
- [SDR 8HBR20231216058](https://openairdocs.org/sdr/8HBR20231216058.md): Plug · worn · Dec 5, 2023 · N24266 · Cessna 152 · Reciprocating Engine Cylinder Section
  > ALUMINUM SHAVINGS WERE FOUND IN THE OIL FILTER DURING 100HR INSPECTION. FOUND THIS TO BE A RESULT OF BOTH PISTON PIN PLUGS BEING WORN ON #1 CYLINDER AND THE CYLINDER WALL HAVING A “RIDGE” AT THE BOTTOM OF THE RING TRAVEL.
- [SDR 8HBR20231216061](https://openairdocs.org/sdr/8HBR20231216061.md): Plug · worn · Nov 14, 2023 · N49824 · Cessna 152 · Reciprocating Engine Cylinder Section
  > ALUMINUM SHAVINGS WERE FOUND IN THE OIL FILTER DURING 100HR INSPECTION. FOUND THIS TO BE A RESULT OF BOTH PISTON PIN PLUGS BEING WORN ON #1 CYLINDER AND THE CYLINDER WALL HAVING A “RIDGE” AT THE BOTTOM OF THE RING TRAVEL. AS WELL AS A BROKEN OIL REGULATOR RING
- [SDR 8HBR20231216056](https://openairdocs.org/sdr/8HBR20231216056.md): Plug · worn · Oct 31, 2023 · N6400Q · Cessna 152 · Reciprocating Engine Cylinder Section
  > ALUMINUM SHAVINGS WERE FOUND IN THE OIL FILTER DURING 100HR INSPECTION. FOUND THIS TO BE A RESULT OF BOTH PISTON PIN PLUGS BEING WORN ON #1 CYLINDER AND THE CYLINDER WALL HAVING A “RIDGE” AT THE BOTTOM OF THE RING TRAVEL.
- [SDR 8HBR20231216057](https://openairdocs.org/sdr/8HBR20231216057.md): Plug · worn · Oct 25, 2023 · N707GS · Cessna 152 · Reciprocating Engine Cylinder Section
  > ALUMINUM SHAVINGS WERE FOUND IN THE OIL FILTER DURING 100HR INSPECTION. FOUND THIS TO BE A RESULT OF BOTH PISTON PIN PLUGS BEING WORN ON #1 CYLINDER AND THE CYLINDER WALL HAVING A “RIDGE” AT THE BOTTOM OF THE RING TRAVEL.
- [SDR 8HBR20231216060](https://openairdocs.org/sdr/8HBR20231216060.md): Plug · worn · Sep 6, 2023 · N89312 · Cessna 152 · Reciprocating Engine Cylinder Section
  > ALUMINUM SHAVINGS WERE FOUND IN THE OIL FILTER DURING 100HR INSPECTION. FOUND THIS TO BE A RESULT OF BOTH PISTON PIN PLUGS BEING WORN ON #1 AND #4 CYLINDERS AND THE CYLINDER WALLS HAVING A “RIDGE” AT THE BOTTOM OF THE RING TRAVEL.
- [SDR 2022FA0000501](https://openairdocs.org/sdr/2022FA0000501.md): Engine · vapor lock · Sep 13, 2022 · N67807 · Cessna 152 · Engine (Reciprocating)
  > OVER LAST 8-10 YEARS, THREE 152'S IN A FLEET OF FOUR, EXPERIENCED PARTIAL POWER LOSS ABOVE 5,000', 27 MINUTES AFTER TAKE-OFF, IN HIGH AMBIENT TEMP CONDITIONS, WITH FULL FUEL, AFTER A FULL POWER CLIMB TO 5,500 AND ABOVE. THE POWER LOSS WAS FOLLOWED BY A LANDIN
- [SDR 8HBR20211108036](https://openairdocs.org/sdr/8HBR20211108036.md): Piston · burned out · Nov 5, 2021 · N89226 · Cessna 152 · Reciprocating Engine Cylinder Section
  > PILOT EXPERIENCED POWER LOSS SHORTLY AFTER TAKE OFF AND LANDED AS SOON AS POSSIBLE. UPON REMOVAL OF SPARK PLUGS THERE WAS UNUSUAL FOULING ON CYLINDER #1 BOTTOM SPARK PLUG, LOOKING THROUGH THE SPARK PLUG HOLE OF CYLINDER #1 REVEALED A HOLE BLOWN THROUGH THE PIS
- [SDR 2020FA0000050](https://openairdocs.org/sdr/2020FA0000050.md): Magneto · out of alignment · Jan 15, 2020 · Magneto/Distributor
  > MAGNETO`S OUT OF TIME. POSSIBLY CAUSING PRE-DETONATION OF FIRING.
- [SDR CA190617026](https://openairdocs.org/sdr/CA190617026.md): Dowel Pin · broken · Jun 15, 2019 · Cessna 152 · Reciprocating Engine Power Section
  > (CAN) AIRCRAFT SUFFERED ENGINE LOSS. THE DOWEL AT THE REAR OF THE CRANKSHAFT BROKE CAUSING THE CAMSHAFT AND MAGNETOS NOT TO TURN. PILOT DID FORCED LANDING. NO INJURIES TO PILOT OR AIRCRAFT. SEE TSB REPORT A19P0068 (TC# 20190617026)
- [SDR CA190509011](https://openairdocs.org/sdr/CA190509011.md): Cylinder · separated · May 8, 2019 · Cessna 152 · Reciprocating Engine Cylinder Section
  > (CAN) SOON AFTER TAKEOFF ENGINE STARTED VIBRATING ABNORMALLY, VIBRATIONS GOT WORST AND PILOT DECLARED AN EMERGENCY AND LANDED SAFELY ON AIRPORT RUNWAY. PRIMARY INVESTIGATION SHOWS CYLINDER #3 NOT SECURED TO CRANKCASE. EFFECT OF VIBRATIONS SHOWS BROKEN EXHAUST,
- [SDR CA190503019](https://openairdocs.org/sdr/CA190503019.md): Engine · failed · Apr 7, 2019 · Cessna 152 · Engine (Reciprocating)
  > (CAN) SHORT AFTER TAKE OFF PILOT REPORTED ENGINE VIBRATIONS. PILOT RETURNED TO AIRPORT AND LANDED SAFELY. MAINTENANCE PERSONNEL INSPECTED ENGINE AND FOUND SOME POTENTIAL MAJOR INTERNAL DAMAGES. ENGINE HAS BEEN REMOVED AND SENT TO ENGINE SHOP FOR INVESTIGATION.
- [SDR CA190206018](https://openairdocs.org/sdr/CA190206018.md): Exhaust Valve · seized · Feb 4, 2019 · Reciprocating Engine Cylinder Section
  > (CAN) AT THE TIME OF THE INCIDENT, THE AIRCRAFT WAS BEING USED TO PRACTICE SLOW FLIGHT IN THE LOCAL TRAINING AREA WHEN THE FLIGHT INSTRUCTOR HAD EXPERIENCED A PARTIAL ENGINE POWER LOSS. FULL POWER WAS APPLIED AND CARBURETOR HEAT WAS TURNED OFF, HOWEVER THE ENG
- [SDR CA190321002](https://openairdocs.org/sdr/CA190321002.md): Rib · cracked · Jan 15, 2019 · Cessna 152 · Rudder, Spar/Rib
  > (CAN) LOWER RIB PART NUMBER 043301015 WAS FOUND CRACKED DURING INSPECTION.
- [SDR 2018FA0000220](https://openairdocs.org/sdr/2018FA0000220.md): Piston · cracked · Jun 7, 2018 · N93989 · Cessna 152 · Reciprocating Engine Power Section
  > NR 3 CYLINDER PISTON FAILURE RESULTING IN COMPLETE ENGINE FAILURE.
- [SDR CA180529019](https://openairdocs.org/sdr/CA180529019.md): Starter · damaged · May 23, 2018 · Cessna 152 · Engine Starter
  > (CAN) STARTER FWD BOLTS BECAME LOOSE AND DEPARTED FROM STARTER. STARTER FWD HOUSING CAME LOOSE FROM STARTER. (TC# 20180529019)
- [SDR CA180529017](https://openairdocs.org/sdr/CA180529017.md): Starter · damaged · May 22, 2018 · Cessna 152 · Engine Starter
  > (CAN) STARTER FWD BOLTS BECAME LOOSE AND DEPARTED FROM STARTER. STARTER FWD HOUSING DEPARTED FROM STARTER UNTIL DISCOVERED. (TC# 20180529017)
- [SDR CA180529018](https://openairdocs.org/sdr/CA180529018.md): Starter · damaged · May 22, 2018 · Cessna 152 · Engine Starter
  > (CAN) STARTER CENTER BODY HOUSING CAME LOOSE. (TC# 20180529018)
- [SDR CA180529016](https://openairdocs.org/sdr/CA180529016.md): Starter · damaged · May 2, 2018 · Cessna 152 · Engine Starter
  > (CAN) STARTER FWD BOLTS BECAME LOOSE AND DEPARTED FROM STARTER. STARTER FWD HOUSING CAME OFF CAUSING STARTER GEAR TO CONTACT FLYWHEEL RING GEAR. (TC# 20180529016)
- [SDR 2017FA0000520](https://openairdocs.org/sdr/2017FA0000520.md): Cylinder Head · cracked · Oct 18, 2017 · N24766 · Cessna 152 · Reciprocating Engine Cylinder Section
  > ONE CYLINDER WAS CRACKED AT THE CROWN OF THE HEAD. CRACK WAS VISIBLE BETWEEN THE CYLINDER FINS WITH EXHAUST PRINTING VISIBLE.
- [SDR 2017FA0000420](https://openairdocs.org/sdr/2017FA0000420.md): Spring · failed · Aug 10, 2017 · N5369H · Cessna 152 · Landing Gear Brake System
  > BROKEN PARKING BRAKE SPRING. AFTER PERFORMING ENGINE RUN UP, LEFT BRAKE STUCK DUE TO A BROKEN PARKING BRAKE SPRING THAT RETAINS PLATE LOCK.
- [SDR FQAR20170516024](https://openairdocs.org/sdr/FQAR20170516024.md): Throttle Cable · twisted · May 16, 2017 · N626PA · Cessna 152 · Power Lever
  > PILOTS REPORTED THE ENGINE WOULD RANDOMLY LOSE 50 - 200 RPM DURING CRUISE FLIGHT. REPEATED INSPECTIONS COULD FIND NO MECHANICAL BASIS FOR THE REPORTED ISSUE. FINALLY, WHEN THE ENGINE WAS GROUND RUN WITH THE COWLINGS OFF, AN OBSEERVER POSTED BY THE AIRCRAFT
- [SDR 2017FA0000391](https://openairdocs.org/sdr/2017FA0000391.md): Shaft · failed · Feb 11, 2017 · N5178B · Cessna 152 · Fuel Control/Reciprocating Engines
  > AT 540 HRS OF OPERATION, THE THROTTLE SHAFT HAS WORN SO BADLY THAT REPLACEMENT WAS NECESSARY. THIS CARBURETOR REPLACED THE LAST ONE DUE TO THE SAME PROBLEM AT 440 HRS OF OPERATION. THIS PARTICULAR SHAFT HAS WORN.025" IN 540 HRS OF OPERATION. THIS ACFT IS A
- [SDR 2016FA0000342](https://openairdocs.org/sdr/2016FA0000342.md): Carburetor · defective · Jul 19, 2016 · N93434 · Cessna 152 · Fuel Control/Reciprocating Engines
  > ON JULY 19, 2016, ON AN INSTRUCTIONAL FLIGHT, EXPERIENCED A MALFUNCTION, POWER TO THE ENGINE COULD NOT BE REDUCED BELOW 2000 RPM. THROTTLE WAS PULLED FULL OUT INDICATING FULL REDUCTION IN POWER. WITH NO SUCCESS IN REDUCING POWER, PIC INFORMED ATC OF THE MALF
- [SDR 2016FA0000298](https://openairdocs.org/sdr/2016FA0000298.md): Piston · broken · Jun 20, 2016 · N68814 · Cessna 152 · Reciprocating Engine Cylinder Section
  > CATASTROPHIC FAILURE. NR 3 ROD BROKEN. CRANKCASE DESTROYED. CRANKSHAFT DESTROYED. NR 3 AND NR 4 CYLINDERS DAMAGED BEYOND REPAIR. ENGINE WAS MODIFIED IAW STC SE793NW FOR 9.7:1 COMPRESSION PISTONS. PILOT REPORTED LEANING ENGINE IN NORMAL FLIGHT SITUATIONS.
- [SDR 5HAS2016FA0000302](https://openairdocs.org/sdr/5HAS2016FA0000302.md): Bypass Valve · defective · Jun 20, 2016 · N68713 · Cessna 152 · Reciprocating Engine Oil System
  > OIL THERMAL BYPASS VALVE WAS FOUND TO NOT MAINTAIN SPECIFIC OPERATING TEMPERATURES, VALVE WAS REPLACED WITH A SERVICEABLE UNIT WITH NO FURTHER ISSUES NOTED.
- [SDR 2016FA0000209](https://openairdocs.org/sdr/2016FA0000209.md): Carburetor · malfunctioned · Apr 28, 2016 · N714XB · Cessna 152 · Fuel Control/Reciprocating Engines
  > ENGINE QUIT AT 300 FT DURING TAKEOFF. ACFT RETURNED TO AIRPORT SAFELY. ENGINE INTERMITTENTLY ROUGH DURING RUN UP AFTER LANDING, TAXI TO RAMP DID FULL POWER RUN UP RAN SMOOTH AND DID MAGNETO CHECK EVERYTHING OK. RAN FOR TEN MINUTES NO ISSUES. SUSPECT CARBUR
- [SDR CA160310006](https://openairdocs.org/sdr/CA160310006.md): Cylinder · oil consumption · Mar 10, 2016 · Cessna 152 · Reciprocating Engine Cylinder Section
  > (CAN) ENGINE WAS O/H ON 2013-10- 29 WITH NEW CYLINDER KITS, PN: 051, 23037. ACFT WAS RETURNED TO SERVICE FOR OPERATION. ON 2015-0714, WITH A TOTAL OF 389.9 HRS. ALL CYLINDERS WERE REMOVED DUE TO HIGH OIL CONSUMPTION. REPAIRS WERE MADE BY AN AMO AND RE-INS
- [SDR 2016FA0000128](https://openairdocs.org/sdr/2016FA0000128.md): Pressure Switch · leaking · Feb 12, 2016 · N60189 · Beech 77 · Engine Oil Indicating System
  > THIS IS A NORMALLY OPEN OIL PRESSURE SWITCH. CONTACTS CLOSE AT 4 PSI TO ACTIVATE THE ENGINE HR METER. THE SWITCH CONSTRUCTION IS METAL BODY, CRIMPED ON THE PLASTIC SWITCH. THIS IS WHERE THE OIL LEAK PROBLEM STARTS. THIS IS THE SECOND SWITCH TO FAIL AND LEA
- [SDR CA160211007](https://openairdocs.org/sdr/CA160211007.md): Muffler · burned · Feb 11, 2016 · Cessna 152 · Engine Noise Suppressor
  > (CAN) WHILE AME WAS DOING MORNING SERVICING OF ACFT BEFORE BEING REMOVED FROM HANGAR NOTICED DISCOLORATION ON END OF TAIL PIPE. EXHAUST SOOT WAS CLEANED OFF. SMALL HOLE NOTICED BURNED THRU TAIL PIPE. EXHAUST WAS REPLACED WITH NEW UNIT.
- [SDR CA151126001](https://openairdocs.org/sdr/CA151126001.md): Rib · cracked · Nov 25, 2015 · Cessna 152 · Elevator, Spar/Rib
  > (CAN) DURING RT ELEVATOR REMOVAL MAINTENANCE NOTICED PLAY IN THE OTBD HINGE ASSY, PN 0432165-1. UPON FURTHER INSPECTION MAINTENANCE FOUND RIB, PN 0432001-53 CRACKED UNDER THE OTBD HINGE IN 2 PLACES. THE RIB/HINGE ASSY WAS REPLACED WITH A SERVICEABLE PART AND
- [SDR 2015FA0000656](https://openairdocs.org/sdr/2015FA0000656.md): Line · cracked · Nov 11, 2015 · N478BK · Cessna 152 · Aircraft Fuel Distribution System
  > A STUDENT PILOT DURING SOLO FLIGHT REPORTED FUEL LEAKING IN THE COCKPIT. LANDED ACFT AND MAINTENANCE DID AN INSPECTION TO FIND THAT THE PRIMER LINE FROM THE FIREWALL TO THE INLET SIDE OF THE PRIMER HAD CRACKED. R & R PRIMER LINE. RETURNED ACFT TO SERVICE.
- [SDR CA151105005](https://openairdocs.org/sdr/CA151105005.md): Rib · cracked · Nov 5, 2015 · Cessna 152 · Horizontal Stabilizer, Spar/Rib
  > (CAN) A SLIGHT BUCKLE IN THE STABILIZER TOP SKIN JUST AHEAD OF THE FORWARD SPAR WAS NOTICED AS ACFT WAS PUSHED INTO HANGAR. UPON FURTHER INVESTIGATION IT WAS FOUND THAT THE NOSE RIB INSIDE THE L/E WAS CRACKED. STABILIZER REMOVED FOR REPAIR AND REINSTALLED AFT
- [SDR CA150727021](https://openairdocs.org/sdr/CA150727021.md): Mount · cracked · Jul 23, 2015 · Cessna 152 · Engine Mount Section
  > (CAN) UPON LANDING THE PILOT NOTICED A NOSE GEAR SHIMMY. UPON INVESTIGATING, THE ENGINE MOUNT WAS FOUND TO BE CRACKED AT THE LOWER NOSE GEAR ATTACH. MOUNT WAS REPAIRED AND ACFT WAS PLACED BACK IN SERVICE.
- [SDR CA150703004](https://openairdocs.org/sdr/CA150703004.md): Drive Shaft · worn · Jun 27, 2015 · Cessna 152 · Magneto/Distributor
  > (CAN) LOSS OF POWER REPORTED AFTER TAKEOFF 150 RPM LOSS REPORTED ENGINE INSPECTED AND RT MAGNETO WAS NOTED THAT THE CAM WAS LOOSE IN THE DRIVE SHAFT. A NEW CAM WAS INSTALLED BUT FOUND TO ALSO BE LOOSE. MAG TTSN 215.6 HRS. LT MAGNETO WAS THEN INSPECTED AND F
- [SDR 2015FA0000240](https://openairdocs.org/sdr/2015FA0000240.md): Piston · broken · May 14, 2015 · N4960A · Cessna A152 · Reciprocating Engine Power Section
  > REMOVED NR 3 CYLINDER DUE TO LOW COMPRESSION, 62/80 PSI, AND FOUND 1"X.5" PIECE MISSING FROM PISTON SKIRT.
- [SDR 5HAS2015FA0000199](https://openairdocs.org/sdr/5HAS2015FA0000199.md): Bolt · sheared · May 12, 2015 · N64895 · Cessna 152 · Vertical Stabilizer
  > AIRCRAFT WAS RECEIVED FOR IT'S SCHEDULED 100 HR INSPECTION, UPON COMPLETION OF THE PRELIMINARY INSPECTION THE FIN ATTACH BOLT AN4-6A THAT IS INSTALLED VERTICALLY THROUGH FITTING, PN: 0431009-3 WAS FOUND SHEARED. THE NUT AND SHANK OF THE BOLT WAS STILL PRESENT
- [SDR U9FS2015FA0000185](https://openairdocs.org/sdr/U9FS2015FA0000185.md): Distributor Gear · loose · May 8, 2015 · N49158 · Cessna 152 · Magneto/Distributor
  > DURING INSPECTION OF THE RT MAGNETO, AFTER FAILURE OF THE MAGNETO, FOUND THE DISTRIBUTOR GEAR ARM TO BE LOOSE. INSPECTION OF THE DISTRIBUTOR GEAR SHOWED THE METHOD OF ATTACHING THE ARM TO THE GEAR HAD BEEN CHANGED. THE PREVIOUS METHOD IS OBVIOUSLY STRONGER. TH
- [SDR 2015FA0000182](https://openairdocs.org/sdr/2015FA0000182.md): Distributor Gear · separated · May 7, 2015 · Cessna 152 · Magneto/Distributor
  > DURING A ROUTINE TRAINING FLIGHT, THE ENGINE BEGAN TO RUN ROUGH AND, INTERMITTENTLY, STOP RUNNING. THE ENGINE LOST POWER AND THE CFI WAS FORCED TO LAND IN A SOFT FIELD. AFTER THE ACFT WAS RECOVERED, THE ENGINE WAS TEST RUN. THE LEFT MAG WAS INOPERATIVE. TH
- [SDR U9FS2015FA0000184](https://openairdocs.org/sdr/U9FS2015FA0000184.md): Distributor Gear · loose · May 1, 2015 · N49158 · Cessna 152 · Magneto/Distributor
  > DURING A ROUTINE TRAINING FLIGHT, ENGINE BEGAN TO RUN ROUGH AND LOST POWER. ACFT MADE A FORCED LANDING IN A PLOWED FIELD CAUSING DAMAGE TO THE NOSE GEAR AND ENGINE MOUNT. LOSS OF ENGINE POWER WAS CAUSED BY THE FAILURE OF THE LT MAGNETO DISTRIBUTOR GEAR ARM W

Next page: https://openairdocs.org/engine/lycoming-o-235-l2c/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 = 'O235L2C'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/engine/lycoming-o-235-l2c/reports

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