# Service difficulty reports: Continental 0-300-A

A list on [Continental 0-300-A](https://openairdocs.org/engine/continental-0-300-a.md).

Newest first. General aviation reporting is voluntary.

- [SDR 2023FA0000321](https://openairdocs.org/sdr/2023FA0000321.md): Piston · failed · May 26, 2023 · N4189F · Cessna 172 · Engine (Reciprocating)
  > INSTALLED NEW CYLINDER KIT WITH VALVES AND PISTON. PISTON MELTED AT UPPER RING, SCORED THE CYLINDER WALL, AND BLEW A HOLE THROUGH ONE SIDE. CYLINDER LOST ALL COMPRESSION AND OVERHEATED. METAL DEBRIS ENTERED THE ENGINE CASE AND ATTACHED TO THE HYDRAULIC LIF
- [SDR 2010FA0001259](https://openairdocs.org/sdr/2010FA0001259.md): Carburetor · contaminated · Nov 16, 2010 · N8306B · Cessna 172 · Fuel Control/Reciprocating Engines
  > ENGINE LOST POWER CAUSING ACFT TO MAKE AN EMERGENCY LANDING IN A SOFT FIELD RESULTING IN THE ACFT FLIPPING OVER AND CAUSING SUBSTANTIAL DAMAGE. UPON INVESTIGATION THE FAA FOUND MICROBIOLOGICAL GROWTH IN THE CARBURETOR'S FUEL BOWL AT THE DRAIN PLUG AREA CAUSIN
- [SDR 2009FA0000745](https://openairdocs.org/sdr/2009FA0000745.md): Magneto · failed · Aug 17, 2009 · N8508B · Cessna 172 · Magneto/Distributor
  > LT MAGNETO SEVERE MISS AND INTERMITTENT, INOPERATIVE IN FLIGHT. SB'S 02-08A AND 03-08A C/W THROUGH INSP. LT MAGNETO, SLICK MODEL 6364, SN 06121363 WITH 356 TOTAL HOURS. FUNCTIONAL CHECK ON GROUND CHECK GOOD BEFORE AND AFTER FLIGHT. INSP REVEALED CAPACITOR, C
- [SDR CA060717002](https://openairdocs.org/sdr/CA060717002.md): Heater · cracked · Jul 10, 2006 · Cessna 172 · Engine Noise Suppressor
  > (CAN) LT MUFFLER CRACKING, BURNING THROUGH. RT MUFFLER CRACKED. STACK CRACKED. NOTE: CRACKS NOT VISIBLE WITH ATTACHMENTS (SCROUNDS) ON. MUFFLER HEATER - LT P/N 0550157-9, RT P/N 0550157-32 (TC NR 20060717002)
- [SDR 2006FA0000573](https://openairdocs.org/sdr/2006FA0000573.md): Rib · cracked · May 25, 2006 · N5039A · Cessna 172 · Rudder, Spar/Rib
  > RIB, CRACKED AT VERTICAL HINGE LINE JUNCTURE. STRESS FROM COUNTER WEIGHT AND NORMAL WEAR. AGE OF THE PART AND THE WIND. SUBMITTER RECOMMENDS CLOSE INSPECTION AND REPLACEMENT OF PART IF DAMAGED. (K)
- [SDR CA040825001](https://openairdocs.org/sdr/CA040825001.md): Bracket · cracked · Aug 17, 2004 · Cessna 170B · Engine Mount Section
  > (CAN) CHANGED LT UPPER ENGINE RAIL BRACKET. PN 0411281-6 REPLACED WITH NEW PART. NEW HARDWARE USED.
- [SDR CA040723005](https://openairdocs.org/sdr/CA040723005.md): Spring · broken · Jul 10, 2004 · Cessna 172 · Magneto/Distributor
  > (CAN) NO POWER TO RT MAGNETO DUE TO BROKEN IMPULSE SPRING RETARDING TIMING.
- [SDR CA040429010](https://openairdocs.org/sdr/CA040429010.md): Hub · corroded · Apr 29, 2004 · Cessna 170A · Propeller Hub Section
  > (CAN) UPON INSPECTION SEVERE CORROSION IN HUB CAVITY AND IN MOUNTING BORE. DIMENSIONS AT MINIMUM BEFORE REWORK. PROPELLER IS UNSERVICEABLE.
- [SDR CA040415002](https://openairdocs.org/sdr/CA040415002.md): Valve Guide · worn · Apr 4, 2004 · Cessna 172 · Reciprocating Engine Cylinder Section
  > (CAN) CYLINDER NR 3, 4 AND 5, EXCESSIVE OIL CONSUMPTION AND LOW COMPRESSION. ENGINE WAS RETURNED TO OVERHAUL FACILITY WHERE IT WAS DISCOVERED THAT 3 OF 6 CYLINDERS HAD EXCESSIVE PLAY IN THE EXHAUST VALVE GUIDES WHICH CAUSED THE VALVE TO BECOME COKED AND STICK
- [SDR CA010223002](https://openairdocs.org/sdr/CA010223002.md): Blade · corroded · Feb 6, 2001 · Cessna 172 · Propeller System
  > (CAN) EXTRA WORK REQUIRED TO REMOVE CORROSION FROM BLADE FACE (CAMBER FACE) IN ACCORDANCE WITH MCCAULEY MANUAL 730720.
- [SDR AU000807](https://openairdocs.org/sdr/AU000807.md): Tachometer · worn · Sep 5, 2000 · Cessna 172 · Engine RPM Indicating System
  > (AUS) TACHOMETER FAILED. ITEM HAD BEEN LAST OVERHAULED IN 1972. (X)
- [SDR AU000588](https://openairdocs.org/sdr/AU000588.md): Engine · making metal · Jun 11, 2000 · Cessna 172 · Engine (Reciprocating)
  > (AUS) DURING CRUISE, A DROP IN INDICATED OIL PRESSURE AND A RISE IN OIL TEMPERATURE WAS OBSERVED. A POST INSPECTION FOUND THE OIL FILTER CLOGGED WITH ALUMINIUM AND WHITE BEARING METAL CONTAMINATION.
- [SDR AU000849](https://openairdocs.org/sdr/AU000849.md): Exhaust Valve · seized · Apr 23, 2000 · Cessna 172D · Reciprocating Engine Cylinder Section
  > (AUS) NR 4 CYLINDER EXHAUST VALVE STUCK IN VALVE GUIDE. (X)
- [SDR CA000301011](https://openairdocs.org/sdr/CA000301011.md): Control Cable · frayed · Feb 15, 2000 · Cessna 170B · Rudder Control System
  > (CAN) DURING THE ANNUAL INSPECTION, THE RUDDER CABLES WERE FOUND CORRODED AND FRAYED WHERE THEY PASS THROUGH THE TAILCONE AREA. THE SUBMITTER STATES THAT THIS AREA IS DIFFICULT TO INSPECT THOROUGHLY WITHOUT DISASSEMBLY OF THE TAIL SECTION.
- [SDR AU000128053](https://openairdocs.org/sdr/AU000128053.md): Engine · seized · Jan 5, 2000 · Cessna 170B · Engine (Reciprocating)
  > (AU) ENGINE LOST ITS OIL AND SEIZED. OPERATOR SPECIFIED FROZEN BREATHER AS THE CAUSE.
- [SDR CA000128053](https://openairdocs.org/sdr/CA000128053.md): Engine · seized · Jan 5, 2000 · Cessna 170B · Engine (Reciprocating)
  > (CAN) ENGINE LOST ITS OIL AND SEIZED. OPERATOR SPECIFIED FROZEN BREATHER AS THE CAUSE.
- [SDR 99ZZZX4693](https://openairdocs.org/sdr/99ZZZX4693.md): Rocker Arm · failed · Dec 1, 1999 · N7452A · Cessna 172 · Reciprocating Engine Cylinder Section
  > NR 6 CYLINDER EXHAUST ROCKER ARM FAILED ON TAKEOFF, INBOARD SECTION CRACKED AT PUSHROD END OIL FEED HOLE AND APPROXIMATELY 180 DEGREES FROM THAT HOLE. PART IS MAGNETIZED.
- [SDR 99ZZZX4432](https://openairdocs.org/sdr/99ZZZX4432.md): Crankshaft · failed · Nov 7, 1999 · N7638T · Cessna 172A · Reciprocating Engine Power Section
  > CRANKSHAFT BROKEN AT NR 6 CONNECTING ROD PIN. OFF-AIRPORT LANDING WITH NO DAMAGE OR INJURY.
- [SDR CA990927046](https://openairdocs.org/sdr/CA990927046.md): Mount · worn · Sep 8, 1999 · Cessna 172 · Engine (Reciprocating)
  > (CAN) ENGINE MOUNT WORN.
- [SDR CA990927047](https://openairdocs.org/sdr/CA990927047.md): Muffler · misrepaired · Sep 8, 1999 · Cessna 172 · Engine Noise Suppressor
  > (CAN) UNAPPROVED WELD REPAIR ON RIGHT MUFFLER.
- [SDR CA990531042](https://openairdocs.org/sdr/CA990531042.md): Support · broken · May 26, 1999 · Cessna 172 · Fuselage Miscellaneous Structure
  > (CAN) RIGHT HAND CONTROL COLUMN OPPERATION BECAME BLOCKED CAUSING LOSS OF AIRCRAFT DURING LANDING APPROACH. THE INSTRUMENT PANEL BRACE BECAME BROKEN AS STATED IN TC SYSTEM SAFETY, DORVAL ACCOMPANYING PHOTO. TSB REPORT TO FOLLOW FILE A99Q0075-2 CADORS 99Q0262
- [SDR CA981109016](https://openairdocs.org/sdr/CA981109016.md): Blade · corroded · Oct 22, 1998 · Cessna 172 · Propeller Blade Section
  > (CAN) PROPELLER RECEIVED FOR CORROSION INSPECTION. INSPECTION FOUND CORROSION AND BLADE DAMAGE DUE TO STONES.
- [SDR CA980811010](https://openairdocs.org/sdr/CA980811010.md): Cylinder · cracked · Jul 24, 1998 · Cessna 172 · Reciprocating Engine Cylinder Section
  > (CAN) LOW COMPRESSION ON NR 2 CYLINDER. INSPECTION FOUND A STICKING EXHAUST VALVE AND THE CYLINDER CRACKED SLIGHTLY FROM THE EXHAUST SEAT TO THE SPARK PLUG. THE CYLINDER WAS REPLACED.
- [SDR 98ZZZX3074](https://openairdocs.org/sdr/98ZZZX3074.md): Breaker Assy · failed · May 7, 1998 · N4156F · Cessna 172 · Magneto/Distributor
  > RIGHT MAGNETO DEVELOPED A LOW EXCESSIVE DROP OF 150 RPM ON GROUND. CHECKS AT 1600 RPM. FOUND RT MAG BREAKER ASSY WITH BROKEN CAM FOLLOWER SPRINGLEAF NEXT TO FACTORY ASSY SCREW. SECOND OCCURRENCE SINCE 1995. SUSPECT ELTROSYSTEMS FAA PMA LEAF SPRINGS TOO BRI
- [SDR 98ZZZX2468](https://openairdocs.org/sdr/98ZZZX2468.md): Cylinder · failed · May 2, 1998 · N6362E · Cessna 172 · Reciprocating Engine Cylinder Section
  > PILOT WAS IN NORMAL CRUISE WHEN HE HAD A SUDDEN POWER LOSS AND ENGINE VIBRATION. AN UNEVENTFUL LANDING WAS MADE ON A ROAD. INVESTIGATION REVEALED THE NR 2 CYLINDER HAD SEPARATED ABOUT 2 INCHES FROM THE ENGINE CASE. THE SEPARATION WAS THROUGH THE STEEL PORTI
- [SDR 97ZZZX4303](https://openairdocs.org/sdr/97ZZZX4303.md): Valve · stuck · Sep 1, 1997 · Cessna 172 · Reciprocating Engine Cylinder Section
  > ENGINE FOUND WITH EXHAUST VALVE STICKING OPEN. AIRCRAFT HAD BEEN RUN ON AUTO GAS. SMOH: 925 HOURS.
- [SDR 97ZZZX1841](https://openairdocs.org/sdr/97ZZZX1841.md): Oil Pan · corroded · Apr 8, 1997 · N8591B · Cessna 172A · Reciprocating Engine Oil System
  > CORROSION FOUND INSIDE OF THE BOTTOM OF THE OIL PAN AROUND THE PLUG BOSS. THIS WAS DUE TO MOISTURE CONDENSING AND COLLECTING AT THE BOTTOM OF PAN. IF THE AIRCRAFT IS GOING TO SIT FOR WEEKS ON END;SUBMITTER SUGGESTS ONE-QUARTER OF THE OIL BE DRAINED AS THIS W
- [SDR 96ZZZX5722](https://openairdocs.org/sdr/96ZZZX5722.md): Cylinder · excess wear · Nov 7, 1996 · Cessna 172 · Reciprocating Engine Cylinder Section
  > THIS FACILITY INSTALLED SIX CYL ASSEMBLIES PREASSEMBLED BY TCM ON AN O300A ENGINE (CESSNA 172). ENGINE WAS OPERATED ON 80/87 AVIATION FUEL AND AEROSHELL 80 MINERAL OIL. AFTER 14 HOURS TOTAL TIME IN SERVICE (TWO MONTHS ELAPSED TIME) LOW COMPRESSION WAS EXPERI
- [SDR CA961016002](https://openairdocs.org/sdr/CA961016002.md): Oil Sump · cracked · Aug 16, 1996 · Cessna 172 · Reciprocating Engine Oil System
  > (CAN) DURING ANNUAL INSPECTION AN OIL LEAK REPORTED BY THE OWNER LED TO INSPECTION OF THE OIL SUMP. EIGHT SMALL CRACKS WERE FOUND FROM THE FORWARD DRAIN PLUG, ONLY TWO WERE LEAKING. THE CRACKS HAD ORIGINATED INSIDE THE SUMP AND WERE CAUSED BY CORROSION PITTING
- [SDR AU960759](https://openairdocs.org/sdr/AU960759.md): Valve · sticking · Mar 31, 1996 · Cessna 172 · Reciprocating Engine Cylinder Section
  > (AUS) EXHAUST VALVE STUCK - OTHER FIVE VALVES TIGHT IN VALVE GUIDES
- [SDR 96ZZZX778](https://openairdocs.org/sdr/96ZZZX778.md): Carburetor · mouse fod · Jan 1, 1996 · N2754L · Cessna 172H · Fuel Control/Reciprocating Engines
  > INVESTIGATION AFTER ENGINE FAILURE DISCOVERED A MOUSE LODGED IN THE CARBURETOR THROAT. THE DESIGN OF THE CABIN/CARBURETOR HEAT SYSTEM LEAVES AN OPEN PATH FROM THE CARBURETOR AIR BOX TO THE CABIN HEAT CONTROL VALVE ASSEMBLY. MICE CAN ENTER VIA THE CABIN OR TH
- [SDR 95ZZZX6406](https://openairdocs.org/sdr/95ZZZX6406.md): Oil Pump · bushing defect · Oct 31, 1995 · N6079A · Cessna 172 · Reciprocating Engine Oil System
  > DURING MAJOR OVERHAUL, REAR CASE/OIL PUMP ASSY AND GEARS REWORKED. ENGINE HAD GOOD OIL PRESSURE, BUT AT OIL CHANGE, PUMP WOULD NOT PRIME ITSELF. DISSASSEMBLY REVEALED PUMP BUSHINGS WERE.004 INCH OUT OF CENTER AND ALLOWED TOO MUCH CLEARANCE ON ONE SIDE.
- [SDR 96ZZZX382](https://openairdocs.org/sdr/96ZZZX382.md): Guide · worn · Oct 15, 1995 · Reciprocating Engine Cylinder Section
  > INSTALLED 6 NEW SUPERIOR MILLENIUM CYLINDERS. THREE CYLINDERS LOST COMPRESSION WITHIN 24 HOURS. PULLED ALL 6 CYLINDERS. ALL 6 EXHAUST GUIDES WORN BEYOND SERVICE LIMITS. THESE WERE THEIR 'POWER PACKS'. PRE-ASSEMBLED WITH NEW VALVES, SPRINGS, PISTONS, ETC.
- [SDR 95ZZZX5932](https://openairdocs.org/sdr/95ZZZX5932.md): Guide · excess wear · Sep 22, 1995 · N6079A · Cessna 172 · Reciprocating Engine Cylinder Section
  > NEW CYLINDERS FOR ENGINE ONLY LASTED FOR 85 HOURS WHEN EXHAUST GUIDES EXHIBITED EXCESS WEAR.
- [SDR 95ZZZX1433](https://openairdocs.org/sdr/95ZZZX1433.md): Magneto · defective · Mar 3, 1995 · N6110E · Cessna 172 · Magneto/Distributor
  > AIRCRAFT LANDED ON ROAD 15 MINUTES AFTER TAKEOFF DUE TO ROUGH ENGINE AND NOT ABLE TO MAINTAIN ALTITUDE. AIRCRAFT HAS NOT RUN IN A LONG TIME. RAN AIRCRAFT ON GROUND 15 TO 20 MINUTES. MAGS CHECKED GOOD UP UNTIL THEN. STARTED GETTING REAL ROUGH, BOTH MAGS AND
- [SDR 95ZZZX1434](https://openairdocs.org/sdr/95ZZZX1434.md): Magneto · defective · Mar 3, 1995 · N6110E · Cessna 172 · Magneto/Distributor
  > AIRCRAFT LANDED ON ROAD 15 MINUTES AFTER TAKEOFF DUE TO ROUGH ENGINE AND NOT ABLE TO MAINTAIN ALTITUDE. AIRCRAFT HAS NOT RUN IN A LONG TIME. RAN AIRCRAFT ON GROUND 15 TO 20 MINUTES. MAGS CHECKED GOOD UP UNTIL THEN. STARTED GETTING REAL ROUGH, BOTH MAGS AND
- [SDR 95ZZZX1001](https://openairdocs.org/sdr/95ZZZX1001.md): Cylinder · guide failed · Jan 20, 1995 · N2420B · Univac GC1B · Reciprocating Engine Cylinder Section
  > ACFT OWNER'S BOOK ON THE O300A CALLS FOR 80/87 FUEL. HOWEVER, THE LEAD HAS BEEN REMOVED FROM 80/87, SO NO LUBRICATION COULD TAKE PLACE. CONTINENTAL USES LEAD IN THE FUEL FOR LUBE. VALVE GUIDES TOTALLY WORE OUT CAUSING LOW COMPRESSION AND HIGH OPERATION TEMP
- [SDR 95ZZZX1002](https://openairdocs.org/sdr/95ZZZX1002.md): Cylinder · cracked · Jan 20, 1995 · N2420B · Univac GC1B · Reciprocating Engine Cylinder Section
  > CYLINDER CRACKED BETWEEN INTAKE AND EXHAUST SEATS.
- [SDR 95ZZZX952](https://openairdocs.org/sdr/95ZZZX952.md): Retainer · missing · Jan 20, 1995 · N2420B · Univac GC1B · Reciprocating Engine Cylinder Section
  > DISASSEMBLY OF THE CYLINDER DISCLOSED A MISSING RETAINER FOR THE EXHAUST VALVE SPRING. WEAR INTO THE ALUMINUM HEAD WAS NOTED. 'NR 2 CYLINDER'.

## 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 = 'O300A'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/engine/continental-0-300-a/reports

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