# Service difficulty reports: Lycoming IO-540-C4B5

A list on [Lycoming IO-540-C4B5](https://openairdocs.org/engine/lycoming-io-540-c4b5.md).

Newest first. General aviation reporting is voluntary.

Page 1 of 4 · 182 reports

- [SDR 2022FA0000403](https://openairdocs.org/sdr/2022FA0000403.md): Governor · inoperative · Jul 24, 2022 · N2345R · Piper PA23250 · Propeller Governor
  > LH PROPELLER GOVERNOR CAN NOT CONTROL PROPELLER RPM. SUSPECT PROP. GOVERNOR IS AT FAULT. REMOVED PROP. GOVERNOR AND SENT OUT FOR OVERHAUL.
- [SDR FA2021081200003](https://openairdocs.org/sdr/FA2021081200003.md): Magneto · failed · Jun 14, 2021 · N150CP · Amtr RV10 · Magneto/Distributor
  > MAGNETO FAILURE, ENGINE STARTED RUNNING ROUGH. PILOT COULD HEAR WHAT WAS DESCRIBED AS A RUBBING SOUND. THE MAGNETO WAS SENT BACK TO THE MANUFACTURER. INSTALLED A REPLACEMENT MAGNETO, AND IT FAILED WITH IN 1.5 HOURS. FAILED IGNITION MAG CHECK. ROUGH RUNNING. AF
- [SDR FA2021081200004](https://openairdocs.org/sdr/FA2021081200004.md): Magneto · failed · Jun 14, 2021 · N150CP · Amtr RV10 · Magneto/Distributor
  > MAGNETO FAILURE, ENGINE STARTED RUNNING ROUGH. PILOT COULD HEAR WHAT WAS DESCRIBED AS A RUBBING SOUND. THE MAGNETO WAS SENT BACK TO THE MANUFACTURER. INSTALLED A REPLACEMENT MAGNETO, AND IT FAILED WITH IN 1.5 HOURS. FAILED IGNITION MAG CHECK. ROUGH RUNNING. AF
- [SDR 2017FA0000182](https://openairdocs.org/sdr/2017FA0000182.md): Magneto · inoperative · Mar 8, 2017 · N105CH · Piper PA23250 · Magneto/Distributor
  > ENGINE SHUT OFF AND WOULD NOT RESTART. LOCAL MAINTENANCE REPLACED LT MAGNETO AND IT FIXED THE ISSUE.
- [SDR 2014FA0000474](https://openairdocs.org/sdr/2014FA0000474.md): Handle · damaged · Aug 11, 2014 · N63983 · Piper PA23250 · Passenger/Crew Doors
  > MAIN CABIN DOOR OPENED DURING TAKEOFF ROLL, RESULTING IN AN ABORTED TAKEOFF. ON INSPECTION, THE CABIN DOOR HANDLE SPLINES WERE FOUND TO BE PARTIALLY STRIPPED. THIS DIRECTLY AFFECTED THE PROPER ROTATION OF THE HANDLE LATCHING ASSY OF THE DOOR THUS THE UPPER
- [SDR 6CWA20140709001](https://openairdocs.org/sdr/6CWA20140709001.md): Engine · making metal · Jun 17, 2014 · N14028 · Piper PA23250 · Engine (Reciprocating)
  > WHILE CONDUCTING CHECK RIDE AND FINISHED INSTRUMENT APPROACHES TO PSM AS PART OF PART 135 CHECK RIDE. AIRPLANE BEGAN TO SHAKE. OBSERVED RT ENGINE MANIFOLD PRESSURE DROPPED. RT PROPELLER HAD FEATHERED ITSELF. INITIATED PROCEDURES TO SECURE THE ENGINE AND CUT O
- [SDR CA131002008](https://openairdocs.org/sdr/CA131002008.md): O-Ring · leaking · Sep 23, 2013 · Piper PA23250 · Hydraulic System, Main
  > (CAN) HYDRAULIC SYSTEM PUMP, FLAPS & GEARS, IN CLIMB, GEARS DOWN WITH EMERGENCY HANDLE. POWER PACK FOUND EMPTY, LEAK BY LT EMERGENCY VALVE, REPLACED O-RING M97E775-112, SYSTEM SERVICED AND TESTED, LEAK CHECKED. OK, RETRACTION CARRIED OUT AND OK.
- [SDR CA121102001](https://openairdocs.org/sdr/CA121102001.md): Skin · cracked · Nov 1, 2012 · Piper PA23250 · Wing, Plate/Skin
  > (CAN) DURING SCHEDULED INSPECTION, CRACKS WERE FOUND ON THE INBOARD LEADING EDGE SKIN THAT DOVE TAILS ONTO THE TOP OF THE MAIN SPAR INSIDE THE CABIN. CRACKS WERE AT FS 91.50 AND WS 23.16. THE CRACK ON THE RIGHT WING IS RUNNING FROM THE AFT EDGE FORWARD ABOUT 3
- [SDR 2012FA0000668](https://openairdocs.org/sdr/2012FA0000668.md): Tube · split · Oct 2, 2012 · N1NX · Beech D95A · Tire Tube
  > FAILURE OF TUBE WHILE ACFT SAT ON RAMP. FOUND SMALL SPLIT IN SIDE OF TUBE. 5TH FAILURE OF RUBBER TUBES EXPERIENCED WITH NO EVIDENCE OF UNDER OR OVER INFLATION.
- [SDR 9RVA2012FA0000062](https://openairdocs.org/sdr/9RVA2012FA0000062.md): Cylinder Head · failed · Jan 21, 2012 · N6540Y · Piper PA23250 · Reciprocating Engine Cylinder Section
  > ACFT HAD JUST DEPARTED ON PART 91 REPOSITIONING FLIGHT BACK HOME. APPROX 10 OR SO MINUTES AFTER DEPARTURE, WHILE LEVEL IN CRUISE FLIGHT AT 7000', RT ENGINE EXPERIENCED SUDDEN POWER LOSS. ENGINE WAS SHUTDOWN, PROP FEATHERED, AND ACFT RETURNED FOR LANDING. FO
- [SDR CA111115008](https://openairdocs.org/sdr/CA111115008.md): Pump · leaking · Nov 4, 2011 · Piper PA23250 · Engine Fuel Pump
  > (CAN) RT ENG POWER LOSS. FOUND OIL LEAK FROM THE DRAIN ON CROSS FEED LT PUMP. PUMP HAS BEEN REPLACED. 2 ENGS RUNNING & RETURNED TO SERVICE. NO PROBLEMS TO REPORT.
- [SDR CA111115009](https://openairdocs.org/sdr/CA111115009.md): Pump · leaking · Nov 4, 2011 · Piper PA23250 · Engine Fuel Pump
  > (CAN) DURING PRE-FLIGHT INSPECTION AN OIL LEAK WAS OBSERVED ON THE RT SIDE BY THE PILOT. AFTER INVESTIGATION THE MECHANICAL GAS PUMP WAS REPLACED. RUN UP WAS PERFORMED, NO LEAKAGE.
- [SDR CA110822006](https://openairdocs.org/sdr/CA110822006.md): Link · broken · Aug 18, 2011 · Piper PA23250 · Nose/Tail Landing Gear Strut/Axle
  > (CAN) DURING GEAR RETRACTION AFTER TAKEOFF, THE GEAR IN-TRANSIT LIGHT DID NOT EXTINGUISH AND THE NOSE GEAR WAS VISUALLY VERIFIED AS PARTIALLY IN THE UP POSITION. THE GEAR WAS EXTENDED NORMALLY IN THE DOWN AND LOCKED POSITION AS INDICATED BY THE GEAR LIGHTS AN
- [SDR CA110429002](https://openairdocs.org/sdr/CA110429002.md): Rod · cracked · Apr 28, 2011 · Piper PA23250 · Hydraulic System, Main
  > (CAN) DURING AN EVENT 3 INSPECTION, MAINTENANCE PERSONNEL FOUND CRACKS ON BOTH LT AND RT MLG HYDRAULIC CYLINDER ACTUATOR ROD, PN 35033-00, AT ROD END ATTACHMENT. CYLINDERS WERE R & R PARTS ORDERED. CYLINDERS ARE AN ON CONDITION PART.
- [SDR CA110307004](https://openairdocs.org/sdr/CA110307004.md): Beam · cracked · Mar 1, 2011 · Lakeac 250LAKE · Fuselage Main, Structure
  > (CAN) ONE INCH CRACK IS LOCATED ON BEAM ASSY LOCATED ON AFT SIDE OF LT WHEEL WELL AREA.
- [SDR CA110112004](https://openairdocs.org/sdr/CA110112004.md): Bracket · cracked · Dec 7, 2010 · Piper PA23250 · Rudder Structure
  > ON REMOVAL OF RUDDER ASSY, FOUND TOP RUDDER HINGE P/N 16103-03 AND MIDDLE RUDDER HINGE BRACKET P/N 16103-02 CRACKED. THE CRACKS ARE LOCATED ON THE OUTSIDE DIAMETER OF BEARING HOUSING.
- [SDR CA101005002](https://openairdocs.org/sdr/CA101005002.md): Beam · cracked · Oct 5, 2010 · Lakeac 250LAKE · Wing Main, Frame Structure
  > (CAN) CRACKED BEAM ASSY.
- [SDR CA101018011](https://openairdocs.org/sdr/CA101018011.md): Bracket · broken · Sep 27, 2010 · Piper PA23250 · Trailing Edge Flaps
  > RT INBD BRACKET, 31003-07, BRACKET REMPLACED, 4-57 DOUBLE INSP C/OUT. SYS TESTED OK. IN DESCENT, RT FLAP DIDN`T GO DOWN, THE PILOT THUS KEPT THE FLAPS UP FOR LANDING. RT INBD BRACKET WAS FOUND BROKEN. BRACKET REPLACED, RIVETING ACCORDING TO AC 4313-1B, PAR
- [SDR CA100813004](https://openairdocs.org/sdr/CA100813004.md): Warning Light · failed · Jul 15, 2010 · Piper PA23250 · Landing Gear Position and Warning
  > ENGLISH VERSION AFTER THE MLG RETRACTION, THE "GEAR UP" LIGHT DID NOT LIGHT. THE ACFT RETURN TO LAND. DURING INSP, THE "DOWN LOCK" HOOK REMAINED WEDGED. THE GEAR CYLINDER WAS VERIFIED AND THE SETTING ADJUSTMENT WAS NOT ACCORDING TO THE MFG. THE SYS WAS REG
- [SDR CA090903001](https://openairdocs.org/sdr/CA090903001.md): Bungee · broken · Aug 31, 2009 · Piper PA23250 · Flight Control System
  > 1/16 STABILATOR BUNGEE CABLE SEPARATED AT UPPER PULLEY WHERE IT MAKES A 90 DEGREE BEND.
- [SDR CA090616012](https://openairdocs.org/sdr/CA090616012.md): Tube Frame · corroded · Jun 12, 2009 · Piper PA23250 · Fuselage Main, Frame
  > (CAN) FUSELAGE FRAME TUBING, SPECIFICALLY LWR LONGERONS, FOUND TO HAVE SERIOUS EXTERNAL CORROSION. DETECTED BY ANOTHER AMO DURING MX, OUR AMO WAS BROUGHT IN TO COMPLETE REPAIRS TO THE TUBING. WHEN RT TUBE WAS CUT TO FACILITATE REPAIRS THERE WAS MOISTURE PRES
- [SDR 2009FA0000466](https://openairdocs.org/sdr/2009FA0000466.md): Knob · corroded · May 5, 2009 · N30CP · Piper PA23250 · Propeller Blade Section
  > PROPELLER WAS DISASSEMBLED FOR O/H AND THE FOLLOWING WAS FOUND AT INSPECTION, THE PITCH CHANGE KNOBS ON BOTH BLADES ARE CORRODED AND ONE PITCH CHANGE KNOB HAS BEEN REWORKED BELOW MINIMUM SPECIFICATIONS. PROPER O/H TECHNIQUES AND INSP CRITERIA WOULD HAVE CAUGH
- [SDR 2009F00005](https://openairdocs.org/sdr/2009F00005.md): Engine · power loss · Dec 30, 2008 · N63790 · Piper PA23250 · Engine (Reciprocating)
  > AFTER APPROX 30 MINUTES OF IFR FLIGHT AT 8000 FT WITH NO OUTSIDE EVIDENCE OF AIRFRAME ICING THE PILOT NOTICED LT ENG LOOSING FUEL PRESSURE AND MANIFOLD PRESSURE, PILOT FOLLOWED ENG FAILURE CHECKLIST AND ALTERNATE AIR, BOOST PUMPS AND FULL MIXTURE WERE APPLIED
- [SDR 2008FA0000874](https://openairdocs.org/sdr/2008FA0000874.md): Distributor · damaged · Nov 18, 2008 · N63954 · Piper PA23250 · Magneto/Distributor
  > SUBJECT PART APPEARS TO HAVE NOT RETAINED ITS LOWER BEARING THAT SUPPORTS THE DISTRIBUTOR GEAR. THE PART WAS FOUND TO BE BURNED AND THE BEARING HOLE MISSING THE BEARING AND ROUNDED OUT WHICH CAUSED THE MAGNETO TO FAIL AND PREVENTED ENGINE STARTUP. JUST PRIOR
- [SDR 2008FA0000209](https://openairdocs.org/sdr/2008FA0000209.md): Breaker Points · worn · Apr 1, 2008 · N62BA · Piper PA23250 · Magneto/Distributor
  > ENGINE BECAME INCREASINGLY DIFFICULT TO START, CHECKED IGNITION TIMING AND FOUND LT MAGNETO OUT OF TOLERANCE. INSPECTED LT MAGNETO, POINTS FAILED TO OPEN DUE TO EXCESSIVLY WORN BREAKER POINT CAM. 87 HOURS SINCE NEW
- [SDR 2008FA0000197](https://openairdocs.org/sdr/2008FA0000197.md): Cylinder · separated · Mar 21, 2008 · Piper PA23250 · Reciprocating Engine Cylinder Section
  > NR 3 CYLINDER SEPARATED FROM ENGINE CASE.
- [SDR CA080122005](https://openairdocs.org/sdr/CA080122005.md): Yoke · cracked · Jan 11, 2008 · Piper PA23250 · Main Landing Gear Strut/Axle/Truck
  > (CAN) DURING ANNUAL INSP, A CRACK WAS FOUND ON THE OB SIDE OF THE LT MAIN LANDING GEAR YOKE. THE CRACK WAS ALONG THE EDGE OF THE CASTING MARK AT THE TOP WHERE THE OLEO SHAFT IS ATTACHED TO THE YOKE. THE CRACK WAS FOUND BY VISUAL INSPECTION. (TC NR 20080122005
- [SDR NAH2007F00000](https://openairdocs.org/sdr/NAH2007F00000.md): Nut · failed · Sep 7, 2007 · N62BA · Piper PA23250 · Reciprocating Engine Cylinder Section
  > NR 3 CYLINDER DEPARTED THE ENGINE AFTER FAILURE OF THE CYLINDER HOLD DOWN NUTS TO MAINTAIN PROPER TORQUE. (3) ADDITIONAL CYLINDERS FROM THE SAME ENGINE WERE INSPECTED REVEALING (5) MORE UNDER TORQUED CYLINDER HOLD DOWN NUTS.
- [SDR 2007F00051](https://openairdocs.org/sdr/2007F00051.md): Cylinder Head · separated · Aug 22, 2007 · Reciprocating Engine Cylinder Section
  > CYLINDER HEAD SEPARATED FROM THE BARREL PRIOR TO DEPARTURE. THE ENGINE HAD BEEN SUFFICIENTLY WARMED UP AND THE GROUND RUN UP CHECKS HAD BEEN COMPLETED.
- [SDR CA070814003](https://openairdocs.org/sdr/CA070814003.md): Spring · broken · Jul 7, 2007 · Piper PA23250 · Landing Gear Retraction/Extension System
  > (CAN) RT LANDING GEAR DOWN LOCK SPRING (P/N 487-312) BROKE AND LODGED ITSELF BETWEEN THE HOOK AND THE LOCK OF THE UPLOCK BOX. THE GEAR COULD NOT MOVE AND THEN THE GEAR LIGHT DID NOT COME ON. (TC NR 20070814003)
- [SDR CA070427007](https://openairdocs.org/sdr/CA070427007.md): Link · broken · Apr 25, 2007 · Piper PA23250 · Nose/Tail Landing Gear
  > (CAN) DURING GEAR RETRACTION THE PILOTS DID NOT GET A GEAR UP AND SAFE LIGHT, UPON VISUALLY INSPECTING THE GEAR WITH THE MIRRORS THE NOSE GEAR WAS SEEN TO BE DANGLING AT AN APPROXIMATE 60 DEGREE ANGLE. GEAR WAS SELECTED DOWN, DOWN AND LOCKED INDICATION WAS PR
- [SDR CA070409005](https://openairdocs.org/sdr/CA070409005.md): Selector · failed · Apr 6, 2007 · Piper PA23250 · Fuel Selector/Shut-Off Valve
  > (CAN) DURING FUNCTIONAL TEST PRIOR TO TAKEOFF, WHEN MOVING FUEL SELECTOR FROM OB TO IB TANKS THE ROLL PIN CONNECTING THE FUEL SELECTOR HANDLE TO THE LINKAGE FAILED. THIS FAILURE LEFT THE RT ENGINE FUEL SELECTOR IN THE OFF POSITION, STARVING THE ENGINE FOR FU
- [SDR CA070208003](https://openairdocs.org/sdr/CA070208003.md): Throttle Cable · failed · Jan 17, 2007 · Piper PA23250 · Power Lever
  > (CAN) DURING DESCENT THE RT THROTTLE DID NOT RESPOND. THE ENGINE WAS SHUTDOWN AND PROPELLER FEATHERED. UPON RETURN TO THE HANGAR, CABLE 30205-002 WAS REPLACED AND DUAL INSPECTION CARRIED OUT. (TC NR 20070208003)
- [SDR 2006FA0001090](https://openairdocs.org/sdr/2006FA0001090.md): Magneto · failed · Nov 15, 2006 · N15FG · Piper PA23250 · Magneto/Distributor
  > PILOT REPORTED THAT HE STARTED LT ENGINE AND THEN ATTEMPTED TO START RT ENGINE ON THE GROUND. RT ENGINE WOULD NOT FIRE. TROUBLESHOT AND TRACED PROBLEM TO LT MAGNETO OF RT ENGINE. REMOVED LT MAGNETO FROM ENGINE. UPON REMOVAL, LOOSE PARTS COULD BE HEARD INSI
- [SDR CA060712002](https://openairdocs.org/sdr/CA060712002.md): Tube · cracked · Jul 4, 2006 · Piper PA23250 · Rudder Control System
  > (CAN) DUE TO HIGH WINDS THAT HIT THE RUDDER (WITHOUT CONTROL LOCKS INSTALLED) INSTALLED THE AIRCRAFT FOR DAMAGE. THE RUDDER PEDAL TUBE WAS FOUND CRACKED. THE PART WAS REPLACED. (TC NR 20060712002)
- [SDR CA060602002](https://openairdocs.org/sdr/CA060602002.md): Tube · separated · May 26, 2006 · Piper PA23250 · Heating System
  > (CAN) DURING REMOVAL OF A BIRDS NEST IN THE FRESH AIR INTAKE LOCATED IN THE NOSE OF THE AIRCRAFT THE HEATER EXHAUST TUBE WAS FOUND TO BE UNSERVICEABLE. THE TUBE ITSELF IS A (WOUND) TUBE AND THE WINDINGS NEAR THE ATTACH POINT HAD SEPARATED THAT WOULD ALLOW HOT
- [SDR NAH2006F00001](https://openairdocs.org/sdr/NAH2006F00001.md): Crankcase · cracked · Mar 9, 2006 · N20AN · Piper PA23250 · Reciprocating Engine Power Section
  > AFTER DEPARTURE, THE PILOT NOTICED OIL LEAKAGE EMANATING FROM THE TOP FORWARD SEAM OF THE LT ENGINE COWLING. A SCAN OF THE ENG INSTRUMENTS WAS NOMINAL, HOWEVER THE PILOT ELECTED TO RTB. AFTER LANDING AND CLEARING THE ACTIVE RUNWAY, THE PILOT DECIDED TO SECU
- [SDR 2006FA0000167](https://openairdocs.org/sdr/2006FA0000167.md): Cylinder Head · separated · Feb 3, 2006 · N62BA · Piper PA23250 · Reciprocating Engine Cylinder Section
  > CYLINDER HEAD SEPARATED FROM CYLINDER FOR REASONS UNKNOWN. (K)
- [SDR 2006FA0000633](https://openairdocs.org/sdr/2006FA0000633.md): Line · broken · Dec 13, 2005 · N331FC · Piper PA23250 · Engine Fuel Distribution
  > THIS PART BROKE ON THE WELDED AREA NEXT TO B-NUT. ALL CLAMPS WERE PROPERLY LOCATED AND TIGHT. THIS FAILURE COULD HAVE BEEN FROM FATIGUE CAUSED BY OVERTORQUING B-NUT TO FUEL NOZZLE. SUGGEST PAYING ATTENTION TO PROPER TORQUE VALVES. (K)
- [SDR 386506171](https://openairdocs.org/sdr/386506171.md): Torque Tube · cut · Jul 1, 2005 · Piper PA23250 · Trailing Edge Flap Control System
  > PERFORMING AD 2003-09-13, FOUND TORQUE TUBE WORE/CUT BY LEFT RUDDER CABLE, 2 INCH LONG AND THRU TUBE WALL. TUBE HAS BEEN INSTALLED SINCE 1996 1100 HRS AGO.
- [SDR 2005FA0000943](https://openairdocs.org/sdr/2005FA0000943.md): Torque Tube · cut · Jul 1, 2005 · Piper PA23250 · Trailing Edge Flap Control System
  > PERFORMING AD 2003-09-13, FOUND TORQUE TUBE WORE/CUT BY LEFT RUDDER CABLE, 2 INCHES LONG AND THRU TUBE WALL. TUBE HAS BEEN INSTALLED SINCE 1996 1100 HRS AGO.
- [SDR 2005FA0000944](https://openairdocs.org/sdr/2005FA0000944.md): Torque Tube · cut · Jul 1, 2005 · Piper PA23250 · Trailing Edge Flap Control System
  > PERFORMING AD 2003-09-13, FOUND TORQUE TUBE WORE/CUT BY LEFT RUDDER CABLE, 2 INCHES LONG AND THRU TUBE WALL. TUBE HAS BEEN INSTALLED SINCE 1996 1100 HRS AGO.
- [SDR 20050605B](https://openairdocs.org/sdr/20050605B.md): Torque Tube · cut · Jul 1, 2005 · Piper PA23250 · Trailing Edge Flap Control System
  > IN PERFORMING AD 2003-09-13, FOUND TORQUE TUBE WORE/CUT BY LEFT RUDDER CABLE. 2 INCH LOG AND THRU TUBE WALL. TUBE HAS BEEN INSTALLED SINCE 1996 1100 HRS AGO.
- [SDR 2005FA0001041](https://openairdocs.org/sdr/2005FA0001041.md): Stud · broken · Jul 1, 2005 · N25KC · Amtr SKYBOLT · Reciprocating Engine Cylinder Section
  > AC WAS ENROUTE WHEN PILOT HEAR (PUFF) NOISE AND SAW OIL BEGINNING TO COME FROM ENGINE COMPARTMENT. HE THROTTLED BACK AND DID A PRECAUTIONARY LANDING AT THE NEAREST AIRPORT. THROTTLED BACK AND DID A PRECAUTIONARY LANDING. UPON INSPECTION IT WAS FOUND THAT 4
- [SDR CA050705002](https://openairdocs.org/sdr/CA050705002.md): Bushing · missing · Jun 30, 2005 · Piper PA23250 · Nose/Tail Landing Gear
  > (CAN) UPON LANDING AND TAXI IN, RIGHT HAND GEAR COLLAPSED, NO PROP STRIKE OCCURRED. DRAG STRUT CENTER BOLT BROKE IN HALF, THUS THE GEAR FAIL. UPON INVESTIGATION FOUND ONE BUSHING MISSING, TWO ARE REQUIRED. COULD NOT FIND BUSHING IN THE TAXI AREA, DON'T KNOW
- [SDR CA050601005](https://openairdocs.org/sdr/CA050601005.md): Wire · broken · May 25, 2005 · Piper PA23250 · Landing Gear Position and Warning
  > (CAN) NO INDICATION OF (NOSE GEAR DOWN). AFTER INSPECTION, WIRE REPAIRED ON LIGHT SOCKET. CO2 BOTTLE REPLACED, SEVERAL RETRACTIONS ACCOMPLISHED.
- [SDR 2005FA0000672](https://openairdocs.org/sdr/2005FA0000672.md): Crankshaft · failed · Apr 6, 2005 · N54231 · Piper PA23250 · Reciprocating Engine Power Section
  > ENGINE WAS DISASSEMBLED AND INSPECTED DUE TO CRANKSHAFT FAILURE. FOUND NR3 CHEEK BROKEN. THIS FAILURE CAUSED EXCESSIVE DAMAGE TO THE CRANKCASE, CAMSHAFT, NR1 AND NR 2 CONNECTING ROD, AND THE ASSOCIATED TAPPET BODIES. CAUSE OF THE FAILURE COULD POSSIBLY BE A
- [SDR 2005FA0000521](https://openairdocs.org/sdr/2005FA0000521.md): Oil Filter · separated · Mar 3, 2005 · N6394 · Reciprocating Engine Oil System
  > BOTH ENGINE OIL FILTERS WERE OPENED AFTER AN OIL CHANGE. BOTH FILTERS HAD THE PAPER FILTER MATERIAL PULLED AWAY FROM THE METAL CRIMP HOLDING THE ENDS TOGETHER.
- [SDR 20050209](https://openairdocs.org/sdr/20050209.md): Shaft · broken · Feb 9, 2005 · Piper PA23250 · Engine (Reciprocating)
  > AT ENGINE DISASSEMBLY FOR OVERHAUL AFTER RUNNING FULL LIFE (1985.4 HRS) GOVERNOR IDLER GEAR SHAFT WAS FOUND BROKEN INSIDE THE GEAR. ENGINE RAN NORMALLY, NO OTHER DAMAGE NOTED.
- [SDR 2005FA0000304](https://openairdocs.org/sdr/2005FA0000304.md): Cylinder Head · cracked · Feb 7, 2005 · N62BA · Piper PA23250 · Reciprocating Engine Cylinder Section
  > DESCENDING IN FLIGHT NR 3 CYL ON RT ENG FAILED. ENG WAS SHUTDOWN AND FEATHERED. AC LANDED WITHOUT FURTHER INCIDENT. THERE WAS NO FIRE. POST INCIDENT INSP OF AREA FOUND, CYLINDER HAD CRACKED AND DISLOCATED AT INTERFACE AREA OF STEEL BARREL AND CYLINDER HEAD.

Next page: https://openairdocs.org/engine/lycoming-io-540-c4b5/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 = 'IO540C4B5'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/engine/lycoming-io-540-c4b5/reports

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