# Service difficulty reports: Cessna LC41-550FG A list on [Cessna LC41-550FG](https://openairdocs.org/model/cessna-lc41-550fg.md). Newest first. General aviation reporting is voluntary. - [SDR 2025FA0000764](https://openairdocs.org/sdr/2025FA0000764.md): Brake Disc · sheared · Nov 18, 2025 · N12744 · Lancar LC41550FG · Landing Gear Brake System > PILOT REPORTED THAT AFTER LANDING AND EXITING THE RUNWAY, HE ATTEMPTED TO MAKE A LEFT TURN ON A TAXIWAY USING DIFFERENTIAL BRAKING. HE STATED HE HEARD A POPPING SOUND AND LOST EFFECTIVE BRAKING OF THE LEFT BRAKE. WE BROUGHT PLANE IN FOR MAINTENANCE TO CORRECT - [SDR 2025FA0000068](https://openairdocs.org/sdr/2025FA0000068.md): Access Panel · damaged · Jan 29, 2025 · N240A · Lancar LC41550FG · Wing, Plate/Skin > LOWER RIGHT WING ACCESS PANEL, ORIGINAL P/N LB57650007-1 REV- HAS A NACA AIR SCOOP AIR DUCT THAT CONNECTS TO FUEL SYSTEM VENT SYSTEM. THIS PANEL RECEIVED A MINOR ALTERATION, BY INSTALLING THE BENDIX KING KLR-10 AOA SYSTEM HEATED PITOT TUBE ASSY P/N 89000008 - [SDR 2023FA0000569](https://openairdocs.org/sdr/2023FA0000569.md): Brake Disc · broken · Sep 26, 2023 · N814HH · Lancar LC41550FG · Brake > DURING THE ANNUAL INSPECTION, MAINTENANCE FOUND THE LH BRAKE DISC BROKEN APPROXIMATELY 4.5 INCHES IN LENGTH AND APPROXIMATELY 1/4 INCH IN WIDTH AROUND FLANGE WHERE THE BRAKE DISC ATTACHES TO THE WHEEL. - [SDR BIER2022011301](https://openairdocs.org/sdr/BIER2022011301.md): Manifold · chafed · Jan 13, 2022 · N667AF · Lancar LC41550FG · Engine Air Intake System > INDUCTION MANIFOLD P/N 655607 WAS REMOVED FROM CURRENT ENGINE MODEL TSIO-550C(11) DUE TO CHAFE DAMAGE. WHEN NEW REPLACEMENT MANIFOLD P/N 646440 WAS RECEIVED AND COMPARED TO DAMAGED MANIFOLD. NEW INDUCTION COULD NOT BE MOUNTED BECAUSE OF ALIGNMENT ISSUES. RESEA - [SDR 2020FA0000001](https://openairdocs.org/sdr/2020FA0000001.md): Bolt · sheared · Jan 3, 2020 · N6509A · Lancar LC41550FG · Nose/Tail Landing Gear Strut/Axle > DURING OVERHAUL OF THE NLG FOUND THE BOLT WHICH HOLDS THE CENTERING CAMSHAFT TO THE NLG STRUT SHEARED AT THE THREADS. THE HEAD, SHANK AND THREADS OF THE BOLT REMAINED IN THE CENTERING CAMSHAFT BUT CAUSED MINOR WEAR TO THE UPPER TUBE ASSY AND CENTERING CAMSHAFT - [SDR BIER20180918001](https://openairdocs.org/sdr/BIER20180918001.md): Structure · cracked · Sep 12, 2018 · N543DR · Lancar LC41550FG · Fuselage Miscellaneous Structure > FUSELAGE AFT FOOTWELL RECESS LOWER CORNERS (FS 127.5) (LT & RT) HAVE DELAMINATIONS WITH LT AFT CORNER HAVING A CRACK 1.375 INCHES LONG. - [SDR 2018FA0000196](https://openairdocs.org/sdr/2018FA0000196.md): Cylinder Head · damaged · Jun 25, 2018 · N405JA · Lancar LC41550FG · Reciprocating Engine Cylinder Section > APPROXIMATELY 8 HOURS AFTER THE NR 5 CYLINDER WAS REPLACED WITH A NEW FACTORY CYLINDER KIT, THE PILOT NOTIFIED US THAT THE NR 5 CYLINDER WOULD NOT "WARM UP" AND THE ENGINE WAS RUNNING ROUGH. EXAMINED THE ENGINE DATA AND CONFIRMED THAT THE NR 5 WAS NOT GETTING - [SDR 2018FA0000101](https://openairdocs.org/sdr/2018FA0000101.md): Cable · damaged · Mar 13, 2018 · N143TT · Lancar LC41550FG · Engine Air Intake System > ALTERNATE AIR CONTROL CABLE IS ROUTED NEAR THE EXHAUST. OVER TIME DUE TO HEAT DAMAGE THE CABLE BECOMES STUCK AND NOT USABLE. HISTORY WITH AFT AIR CABLE. 5-1-14 ACTT779.3 ATT AIR CABLE INOP - PRESSURED TUBED OPS CHECK GOOD. 2-9-15 ACTT 870.9 ATT AIR CABLE I - [SDR BIER20160517001](https://openairdocs.org/sdr/BIER20160517001.md): Valve · leaking · May 17, 2016 · N600TX · Lancar LC41550FG · Pitot/Static System > DURING THE PROCESS TO ACCOMPLISHING INSPECTION AND TESTING FOR CFR PART 91.411 AND \ 91.413, FOUND THE ALTERNATE STATIC VALVE CAUSING A LEAK THAT EXCEEDS LIMITS ABOVE 19K FEET, LEAKING 300 FPM. FOREMAN TRYED TO ORDER THE VALVE IAW THE IPC AND WAS TOLD THE BAS - [SDR BIER2016031500001](https://openairdocs.org/sdr/BIER2016031500001.md): Case · cracked · Mar 14, 2016 · N2730P · Lancar LC41550FG · Reciprocating Engine Power Section > CUSTOMER ARRIVED AT REPAIR STATION STATING HE HAD AN OIL LEAK. ENGINE COWLING WAS REMOVED TO DETERMINE SOURCE OF LEAK. INITIAL INSPECTION AND REPAIR WAS ON LEAKING CYLINDER STUDS ON NR 4 CYLINDER, LT SIDE OF ENGINE. NR 4 CYLINDER WAS SENT OFF FOR HONING AND - [SDR 2016FA0000084](https://openairdocs.org/sdr/2016FA0000084.md): Magneto · failed · Dec 8, 2015 · N932AC · Lancar LC41550FG · Magneto/Distributor > DUEL MAG FAILURE. RT MAGNETO HAD A STRIPPED GEAR. LT MAG TIMING WAS AS PER THE DATA PLATE. BOTH MAGS WERE PICKED UP BY THE NTSB. - [SDR NF2R201812190001](https://openairdocs.org/sdr/NF2R201812190001.md): Lifter · galled · Sep 12, 2014 · N86ND · Lancar LC41550FG · Reciprocating Engine Power Section > INSPECTION OF ALL 6 CYLINDERS FOUND 5 OUT OF LIMITS AND ALL CYLINDERS HAD BAD EXHAUST AND INTAKE GUIDES AND VALVES. FOUND LIFTERS ARE PITTED AND STARTING TO CHIP, CAMSHAFT IS UNDAMAGED AT THIS TIME. - [SDR 2013FA0000643](https://openairdocs.org/sdr/2013FA0000643.md): Control Rod · worn · Nov 18, 2013 · N247MC · Lancar LC41550FG · Trailing Edge Flap Control System > RT FLAP CONTROL ROD HAS EXCESSIVE PLAY CAUSED BY THE URETHANE INSULATOR THAT IS MOUNTED BETWEEN 2 METAL CONTROL ROD SECTIONS AND HELD TOGETHER BY MS27039-1-23 SCREWS. THE HOLES IN THIS ASSY ELONGATED BEYOND MFG LIMITS. THIS IS A CONTINUAL ISSUE WITH THESE LT - [SDR 2013FA0000642](https://openairdocs.org/sdr/2013FA0000642.md): Control Rod · worn · Nov 18, 2013 · N1159Q · Lancar LC41550FG · Trailing Edge Flap Control System > RIGHT FLAP CONTROL ROD HAS EXCESSIVE PLAY. THE ROD ASSY IS PN LA57266102 WHICH IS CONSTRUCTED BY PN'S 286102-8 FOR THE URETHANE INSULATOR AND PN'S 2562102-3 AND 2862102-1. THE URETHANE INSULATOR IS MOUNTED BETWEEN BOTH METAL CONTROL RODSECTIONS AND HELD TOGE - [SDR VNFR20130624001](https://openairdocs.org/sdr/VNFR20130624001.md): Window · cracked · Jun 24, 2013 · N1211D · Lancar LC41550FG · Passenger Compartment Windows > DURING FLIGHT, THE PILOT REPORTED A POP ON PERFORMING A NORMAL LANDING, PILOT NOTED THE RT REAR PASSENGER WINDOW HAD A LARGE CRACK THAT EXTENDED IN A CRESCENT SHAPE THROUGH THE LOWER FORWARD PORTION OF THE WINDOW AND INTO THE FILLER SURROUNDING THE WINDOW. - [SDR VNFR20130618001](https://openairdocs.org/sdr/VNFR20130618001.md): Spark Plug · cracked · Jun 18, 2013 · N1036P · Lancar LC41550FG · Spark Plug/Igniter > CRACKED CERAMIC ON NR 5 LOWER SPARK PLUG. - [SDR 2013FA0000328](https://openairdocs.org/sdr/2013FA0000328.md): Fan · failed · May 17, 2013 · N2521W · Lancar LC41550FG · DC Generating System > DURING CRUISE FLIGHT, HEARD A BANG AND THEN SAW A METAL OBJECT COME THROUGH HIS TOP ENGINE COWLING. LANDED AT THE NEAREST AVAILABLE AIRPORT. COOLING FAN ASSY, ALTERNATOR, THAT MOUNTS ON REAR OF ENGINE SEPARATED FROM ALTERNATOR. THE FAN PIECES BECAME PROJ - [SDR 2012FA0000793](https://openairdocs.org/sdr/2012FA0000793.md): Exhaust Pipe · cracked · Dec 4, 2012 · N619VB · Lancar LC41550FG · Engine Collector/Tailpipe/Nozzle > DURING A 50 HOUR INSPECTION, A LARGE CRACK WAS FOUND THAT NEARLY CIRCLED THE ENTIRE TRANSITION. LOWER HALF OF TURBO TRANSITION WAS VERY CLOSE TO SEPARATING FROM THE REMAINING EXHAUST. - [SDR 2012FA0000231](https://openairdocs.org/sdr/2012FA0000231.md): Shaft · sheared · Apr 20, 2012 · N2511G · Lancar LC41550FG · DC Generator-Alternator > PILOT REPORTED LOSS OF RIGHT HAND ALTERNATOR ON FINAL APPROACH TO THE AIRPORT. DURING TAXI OPERATIONS TO THE RAMP THE PILOT REPORTED HEARING A "NOISE" FROM THE FRONT OF THE ACFT. UPON REMOVAL OF THE ALTERNATOR FROM THE ENGINE, IT WAS DISCOVERED THAT THE ALTE - [SDR 2012FA0000103](https://openairdocs.org/sdr/2012FA0000103.md): Spark Plug · cracked · Feb 9, 2012 · N762CS · Lancar LC41550FG · Spark Plug/Igniter > RT B32S SPARK PLUGS HAVE CRACKED PORCELAIN, QTY 6 OUT OF 12, FOUND DURING ANNUAL INSPECTION. - [SDR 2011FA0000184](https://openairdocs.org/sdr/2011FA0000184.md): Torque Tube · corroded · Mar 18, 2011 · N2528D · Lancar LC41550FG · Elevator Control System > ELEVATOR TORQUE TUBE HAS INTERNAL CORROSION INSIDE TORQUE TUBE WITH RUST CONCENTRATION AROUND WELDED AREAS. AMM CHAP 27-30-00, PAGE 3 ITEM 2(C)(3) STATES TO INSPECT EVERY 200 HRS OR ANNUAL FOR INTEGRITY, EXCESSIVE WEAR, AND CRACKS. INSPECT WELD FOR CRACKS. T - [SDR YWYR201209158126](https://openairdocs.org/sdr/YWYR201209158126.md): Spark Plug · cracked · Oct 26, 2010 · N385RW · Lancar LC41550FG · Spark Plug/Igniter > DURING ANNUAL INSPECTION, 5 OF THE 12 ACFT SPARK PLUGS WERE FOUND TO HAVE CRACKS IN THE ELECTRODE INSULATORS. ENGINE CYLINDERS WERE INSPECTED USING BORESCOPE AND NO DEFECTS WERE FOUND. REPLACED DEFECTIVE SPARK PLUGS WITH NEW. - [SDR YWYR201209158048](https://openairdocs.org/sdr/YWYR201209158048.md): Spark Plug · cracked · Sep 13, 2010 · N512RP · Lancar LC41550FG · Spark Plug/Igniter > DURING AN ANNUAL INSPECTION, ONE OF TWELVE SPARK PLUGS WERE FOUND TO HAVE A CRACKED ELECTRODE INSULATOR. SPARK PLUG WAS REPLACED WITH NEW PART. - [SDR 2010FA0000251](https://openairdocs.org/sdr/2010FA0000251.md): Mount Flange · cracked · Mar 10, 2010 · N5194Y · Lancar LC41550FG · Fuselage Main, Attach Fittings > OIL COOLER MOUNTING FLANGE IS CRACKED AT RADIUS. THIS IS A RECURRING ISSUE WITH THESE COOLERS. THIS COOLER IS HAS 254.0 HRS SINCE LAST CHANGE DUE TO THE SAME REASON, CRACKED FLANGE AT THE RADIUS WHERE THE FLANGE IS ATTACHED. LAST COOLER CHANGED WAS PN 65458 - [SDR T9ZR725YWO4459](https://openairdocs.org/sdr/T9ZR725YWO4459.md): Starter · out of tolerance · Feb 26, 2010 · N728SM · Lancar LC41550FG · Engine Starter > DURING REMOVAL OF THE STARTER AND THE O/H OF THE STARTER DRIVE ADAPTER IT WAS FOUND THAT THE NEWLY INSTALLED STARTER IS.015 SMALLER AT THE HOUSING FLANGE THAN THE FACTORY INSTALLED STARTER. THE STARTER DRIVE ADAPTER WAS OBSERVED TO BE LEAKING OIL WERE THE STA - [SDR 2010FA0000189](https://openairdocs.org/sdr/2010FA0000189.md): Spark Plug · broken · Jan 4, 2010 · N888NK · Lancar LC41550FG · Spark Plug/Igniter > ONE SPARK PLUG CERAMIC WAS FOUND BROKEN. OTHERS WERE FOUND CRACKED. THESE SPARK PLUGS WERE MIS-FIRING DURING HIGH POWER OPERATION. NO DEFECT WAS NOTED DURING NORMAL GROUND ENGINE RUN UP MAGNETO CHECK. - [SDR 2009FA0000723](https://openairdocs.org/sdr/2009FA0000723.md): Guard · broken · Aug 4, 2009 · N999GL · Lancar LC41550FG · Cabin Compressor System > THE AIR CONDITIONER BELT GUARD FAILED IN FLIGHT. INSP REVEALED 2 SMALL CRACKS AT THE LT SIDE WELDED NUT. THIS FAILURE CAUSED A 2 INCH X 2 INCH STEEL PIECE OF THE BELT GUARD TO SEPARATE, STRIKE THE AIR CONDITIONER CLUTCH ASSY AND SHEAR THE CLUTCH ASSY, BOTH O - [SDR YWYR201209157151](https://openairdocs.org/sdr/YWYR201209157151.md): Spark Plug · cracked · May 21, 2009 · N440TM · Lancar LC41550FG · Spark Plug/Igniter > DURING ANNUAL INSPECTION, 1 OF THE 12 ENGINE SPARK PLUGS WAS FOUND TO HAVE A CRACKED ELECTRODE INSULATOR. - [SDR MDR40120009004](https://openairdocs.org/sdr/MDR40120009004.md): Tube · chafed · Apr 1, 2009 · N2522F · Lancar LC41550FG · Reciprocating Engine Oil System > THE OIL FILLER TUBES ARE BEING CHAFED BEYOND MFG LIMIT OF.010 DUE TO CONTACT WITH THE CYLINDER BAFFLING BETWEEN CYLINDERS NR 2 AND 4. SHOULD THE TUBE CHAFE COMPLETELY THROUGH, AN OIL LEAK WILL OCCUR AND DEPENDING HOW MUCH THE ENGINE CASE IS PRESSURIZING, ALL - [SDR 2008FA0000269](https://openairdocs.org/sdr/2008FA0000269.md): Transition Duct · cracked · Apr 1, 2008 · N139DC · Lancar LC41550FG · Exhaust Turbocharger > DURING ANNUAL INSPECTION FOUND TURBO TRANSITION PART OF EXHAUST CRACKED ALL THE WAY THRU FRONT RADIUS OF THE PIPE. (K) - [SDR 2008FA0000225](https://openairdocs.org/sdr/2008FA0000225.md): Transition Duct · cracked · Apr 1, 2008 · N431PC · Lancar LC41550FG · Exhaust Turbocharger > DURING ANNUAL INSP FOUND TURBO TRANSITION PART OF EXHAUST CRACKED ALL THE WAY THRU FRONT RADIUS OF THE PIPE. (K) - [SDR 2008FA0000211](https://openairdocs.org/sdr/2008FA0000211.md): Duct · cracked · Mar 12, 2008 · Lancar LC41550FG · Engine (Reciprocating) > RT TURBO TRANSITION DUCT CRACKED. (NOTE: THIS IS THE SECOND TIME WE HAVE SEEN THIS) - [SDR 2007FA0000028](https://openairdocs.org/sdr/2007FA0000028.md): Dipstick · separated · Dec 29, 2006 · N442TA · Amtr LC41550FG · Reciprocating Engine Oil System > THE OIL GAGE ASSEMBLY (DIPSTICK) SEPARATED AT THE UPPER SWEDGED JOINT. (K) - [SDR 2006FA0000889](https://openairdocs.org/sdr/2006FA0000889.md): Union · cracked · Aug 29, 2006 · N999GL · Amtr LC41550FG · Engine Oil Distribution (Airframe Furnished) > THE AN911-1J UNION THAT SUPPLIES OIL TO THE OIL PRESSURE TRANSDUCER, THE HOBBS PRESSURE SWITCH, AND THE OIL FEED LINE, AT THE BASE OF THE OIL COOLER, ON THE BACK OF THE ENGINE, WAS CRACKED AT THE PIPE THREADS, AND THEN BROKE IN THE PROCESS OF REMOVING THE PART - [SDR 2006FA0000829](https://openairdocs.org/sdr/2006FA0000829.md): Points · broken · Aug 9, 2006 · N400UK · Amtr LC41550FG · Magneto/Distributor > MAGNETO FAILURE, ON ECR ON INSP RT MAGNETO POINT HAD BROKEN IN HALF. (K) - [SDR 2006FA0000752](https://openairdocs.org/sdr/2006FA0000752.md): Safety Wire · misinstalled · Jul 20, 2006 · N2542T · Amtr LC41550FG · Engine Mount Section > ALL 4 ENGINE VIBRATION ISOLATOR MOUNT BOLTS WERE SAFETY WIRED BACKWARDS. NO EVIDENCE OF DAMAGE. (K) - [SDR 2006FA0000343](https://openairdocs.org/sdr/2006FA0000343.md): Points · broken · Apr 1, 2006 · N79HR · Amtr LC41550FG · Magneto/Distributor > ON ENGINE GROUND RUN PRIOR TO FLIGHT MAGNETO CHECK FOUND RT MAGNETO HAD FAILED INSPECTION FOUND POINTS BROKEN PICTURE INCLOSED. (K) - [SDR AU510001912](https://openairdocs.org/sdr/AU510001912.md): Tire · disintegrated · Dec 12, 2005 · Amtr LC41550FG · Tire > (AUS) NOSE WHEEL TYRE DISINTEGRATED CIRCUMFERENTIALLY. INVESTIGATION FOUND EXCESSIVELY LONG NOSEWHEEL SPAT ATTACHMENT SCREWS WHICH CUT INTO THE TYRE AS IT ROTATED. INCORRECT PART. (CASA NR 510001912) - [SDR AU510001765](https://openairdocs.org/sdr/AU510001765.md): Pump · failed · Apr 8, 2005 · Amtr LC41550FG · Vacuum Distribution System > (AUS) VACUUM PUMPS FAILED. (OTHER CAUSE: MATERIAL - DEBRIS REMAINING AFTER FAILURE) (CASA NR 510001765) - [SDR AU510001680](https://openairdocs.org/sdr/AU510001680.md): Pump · failed · Apr 8, 2005 · Amtr LC41550FG · Vacuum Distribution System > EXCESSIVE AMOUNT OF VACUUM PUMPS FAILING EITHER ON FITMENT OR SHORTLY AFTER. THESE PUMPS ARE PURCHASED FROM AERO ACCESSORIES INC. - [SDR AU510002168](https://openairdocs.org/sdr/AU510002168.md): Bearing · mismanufactured · Feb 11, 2005 · Amtr LC41550FG · Wheel/Ski/Float > NEW WHEEL BEARING HAD TWO ROLLERS MISSING. FAULTY MFG. ## 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 aircraft_model_key = 'LC41550FG' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/model/cessna-lc41-550fg/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.