# Service difficulty reports: Lycoming TIO-540-AH1A A list on [Lycoming TIO-540-AH1A](https://openairdocs.org/engine/lycoming-tio-540-ah1a.md). Newest first. General aviation reporting is voluntary. - [SDR 2023FA0000794](https://openairdocs.org/sdr/2023FA0000794.md): Intake Valve · broken · Oct 21, 2023 · N4187A · Piper PA32R301T · Reciprocating Engine Cylinder Section > ENGINE LOST POWER ON TAKEOFF ROLL AND TAKE OFF WAS SAFELY ABORTED. FOUND NO COMPRESSION ON CYLINDER #6 AND DETERMINED THE ENTIRE INTAKE VALVE WAS MISSING. FOUND VALVE IN THREE PIECES IN INTAKE PLENUM. VALVE STEM TIP HAD SEPARATED FROM THE VALVE STEM AT THE K - [SDR SMTR20190508001](https://openairdocs.org/sdr/SMTR20190508001.md): Oil System · defective · May 6, 2019 · N87AG · Gippld GA8TC320 · Engine Oil Distribution (Airframe Furnished) > OIL COOLER RUPTURED DURING COLD ENGINE START. INVESTIGATION DETERMINED OIL PRESSURE EXPERIENCED BY THE OIL COOLER AT INITIAL COLD ENGINE START REACHED 425 PSI. ON A CALIBRATED TEST GAUGE TEE'D INTO THE OIL COOLER INLET LINE. RESEARCH DISCOVERED THE OIL COOLER - [SDR 2017FA0000237](https://openairdocs.org/sdr/2017FA0000237.md): Diffuser · damaged · Jun 5, 2017 · N267MA · Gippld GA8TC320 · Reciprocating Engine Oil System > DURING AN ANNUAL INSPECTION, THE TECHNICIAN DROPPED THE OIL ON THE AIRCRAFT AND CLOSED THE SUMP DRAIN. LEFT FOR THE EVENING. UPON RETURN, NOTICED OIL LEAKING FROM THE SUMP DRAIN. REMOVED THE QUICK DRAIN AND FOUND A PIECE OF BROKEN SAFETY FROM A BOLT HEAD STU - [SDR 2017FA0000144](https://openairdocs.org/sdr/2017FA0000144.md): Pump · inoperative · Jan 14, 2017 · N227FW · Piper PA32R301T · Engine Fuel Pump > PRE-FLIGHT RUN-UP DISCOVERED LACK OF TAKE OFF POWER AND ENGINE VIBRATION. THE AIRCRAFT FLIGHT WAS ABORTED AND THE AIRCRAFT RETURNED TO THE HANGER. THE ENGINE WAS TROUBLESHOT AND THE ENGINE DRIVEN FUEL PUMP WAS DISCOVERED TO HAVE MULTIPLE DEFECTS IN ITS LOWER - [SDR 2016FA0000090](https://openairdocs.org/sdr/2016FA0000090.md): Oil System · overtemp · Feb 11, 2016 · N4992K · Piper PA32R301T · Reciprocating Engine Oil System > ON CLIMBOUT TO 9000 FT OIL TEMP WENT TO 240 DEGREES F AT 7500 FT. REDUCED POWER TO 20MAP AND TEMP KEPT CLIMBING TO 270. MADE A PRECAUTIONARY LANDING. GROUND TEMP 21 DEGREE F AIR TEMP AT 7500 FT 0 DEGREE F - [SDR CA151125006](https://openairdocs.org/sdr/CA151125006.md): Skin · unsecure · Nov 23, 2015 · Gippld GA8 · Wing, Plate/Skin > (CAN) SINCE THE OPERATION ON THE AIRCRAFT, ALL THE WING PANELS HAVE BEEN NOTICED TO BE COMING LOSE DURING ANY SCHEDULED MAINTENANCE PROCEDURE. ALL THE NUMBER 6 SCREWS THAT HOLD THE PANELS IN ARE ALL FOUND TO NOT TIGHTEN PROPERLY. A LARGER SCREW (NUMBER 8) IS N - [SDR 2015FA0000511](https://openairdocs.org/sdr/2015FA0000511.md): Magneto · out of adjust · Oct 27, 2015 · N132GM · Piper PA32R301T · Magneto/Distributor > THE PILOT REPORTED THAT HIS ENGINE WAS HARD TO START AND GETTING WORSE. THE ENGINE TO MAGNETO TIMING WAS CHECKED AND REVEALED THE TIMING ON BOTH MAGNETOS WERE ADVANCED 7 TO 8 DEGREES BEYOND THE ENGINE DATA PLATE TIMING SPEC OF 20 DEGREES BTC. THE MAGNETOS WE - [SDR PCPR201510140001](https://openairdocs.org/sdr/PCPR201510140001.md): Brake Sys · failed · Oct 13, 2015 · N130HP · Gippld GA8TC320 · Landing Gear Brake System > PILOT REPORTED TO MAINTENANCE CREW, WHEN DEPRESSING PILOT'S SIDE RUDDER PEDALS FOR BRAKING, RT BRAKE HAD NO PRESSURE AND DID NOT BRAKE. PILOT RELEASED PEDALS AND ATTEMPTED TO BRAKE AGAIN AT WHICH TIME BOTH BRAKES WORKED NORMALLY. MAINTENANCE CREW INSPECTED A - [SDR CA150930014](https://openairdocs.org/sdr/CA150930014.md): Tube · damaged · Sep 12, 2015 · Gippld GA8TC320 · Tire Tube > (CAN) UPON LANDING A FLAT TIRE ON THE LT SIDE HAPPENED. UPON FURTHER INSPECTION, WE FOUND THAT THERE WAS A MISSING VALVE STEM. THE VALVE STEM WAS COMPLETELY RIPPED OFF. CHANGED THE TUBE AND REPLACED THE TIRE. - [SDR CA150930015](https://openairdocs.org/sdr/CA150930015.md): Fan · failed · Sep 12, 2015 · Gippld GA8TC320 · Central Display > (CAN) DURING FLIGHT, A WARNING NOTIFICATION WAS GIVEN TO THE PILOT ON THE GDU DISPLAY STATING FAN FAULT. UPON INSPECTION AT THE MAINTENANCE FACILITY, WE FOUND THAT THE FAN WAS STRUGGLING TO SPIN FOR COOLING. WORRIED THAT THE FAN WILL CAUSE THE GDU TO OVERHEAT, - [SDR CA150930013](https://openairdocs.org/sdr/CA150930013.md): Magneto · malfunctioned · Aug 24, 2015 · Gippld GA8TC320 · Magneto/Distributor > (CAN) AT ABOUT 200 HOURS AFTER INSTALLATION OF A NEW OR OVERHAULED P/N 6160 MAGNETO, WE HAVE NOTICED THAT THE ENGINE IS HARD OF STARTING. THIS IS THE L/H MAGNETO ON THE ENGINE WHICH IS AN IMPULSE COUPLING MAGNETO USED FOR STARTING. THE MAGNETO CANNOT BE RE-TIM - [SDR CA150823005](https://openairdocs.org/sdr/CA150823005.md): Magneto · malfunctioned · Jul 29, 2015 · Magneto/Distributor > (CAN) ENGINE DIFFICULT TO START WHEN HOT. INSPECTED FOUND BAD IMPULSE COUPLING. MAINTENANCE COMPLETED. THIS MAG FAILURE OCCURS WELL DESCRIBED MAGNETO OVERHAUL/500 HOUR INSPECTION TIMES. THE LT IMPULSE MAGNETO IS EQUIPPED WITH AN IMPULSE COUPLING THAT IS USE - [SDR CA150823004](https://openairdocs.org/sdr/CA150823004.md): Magneto · out of adjust · Jul 9, 2015 · Magneto/Distributor > (CAN) ENGINE DIFFICULT TO START WHEN HOT AND MAG TIMING OUT OF LIMITS IAW SERVICE LETTER. - [SDR CA150823003](https://openairdocs.org/sdr/CA150823003.md): Magneto · unknown · May 27, 2015 · Magneto/Distributor > (CAN) ENGINE DIFFICULT TO START WHEN HOT. REMOVED AND REPLACED THE LT MAGNETO. - [SDR CA150823002](https://openairdocs.org/sdr/CA150823002.md): Magneto · malfunctioned · Apr 15, 2015 · Magneto/Distributor > (CAN) ENGINE DIFFICULT TO START WHEN HOT. REMOVED AND REPLACED THE LT MAGNETO. - [SDR CA150823001](https://openairdocs.org/sdr/CA150823001.md): Oil Fill Port · cracked · Feb 27, 2015 · Engine Oil Cooler > (CAN) AIRCRAFT LEFT OVERNIGHT IN THE COLD (-30) WITHOUT PLUG-IN. OIL COOLER CRACKED ON START-UP, AS INDICATED BY OIL LEAK FROM ENGINE COWL. S/N 912-10659-20 AND S/N K11-9935-34 REMOVED AND P/N 20006A S/N E91-1272-10 AND S/N E91-1272-4 INSTALLED. - [SDR CA150212011](https://openairdocs.org/sdr/CA150212011.md): Breather Tube · damaged · Feb 7, 2015 · Gippld GA8TC320 · Turbine Engine Oil System > (CAN) ICE FORMED INSIDE OF LOWER END OF TUBE THAT IS EXPOSED TO COLD AIRFLOW BELOW COWLING. THE BREATHING TUBE IS STREAMLINED A SMALL AMOUNT, WHICH RESTRICTS AIRFLOW AND MAKES A GOOD PLACE FOR ICE TO COLLECT. MFG HAS RELEASED A NEW MANDATORY SB-GA8-2015-125, - [SDR CA150303007](https://openairdocs.org/sdr/CA150303007.md): Setscrew · damaged · Jan 17, 2015 · Piper PA32R301T · Reciprocating Engine Oil System > (CAN) IN FLIGHT FAILURE OF ENGINE DURING CRUISE. ENGINE DISASSEMBLY AND ASSESSMENT FOUND INCORRECT PROPELLER GOVERNOR GEAR SHAFT SET SCREW P AND INCORRECT SAFTEING PROCEDURE USED FOR PEENING OF THE SET SCREW. SET SCREW CAME LOOSE INSIDE OF ENGINE CAUSING THE - [SDR CA140823001](https://openairdocs.org/sdr/CA140823001.md): Coupling · cracked · Aug 23, 2014 · Piper PA32R301T · Exhaust Turbocharger > (CAN) DURING INSPECTION, FOUND ENGINE EXHAUST TO TURBOCHARGER WASTEGATE VALVE V-BAND COUPLING, CRACKED. - [SDR 3WGR20140502001](https://openairdocs.org/sdr/3WGR20140502001.md): Magneto · contaminated · Apr 18, 2014 · N87AG · Gippld GA8 · Magneto/Distributor > DURING 100 HOUR INSPECTION, FOUND BOTH MAGNETOS WERE CONTAMINATED WITH ENGINE OIL. LT MAGNETO TO ENGINE WAS SET AT 25 DEGREES BEFORE TOP DEAD CENTER (BTDC). IT SHOULD HAVE BEEN SET AT 20 DEGREES BTDC. - [SDR 2012FA0000299](https://openairdocs.org/sdr/2012FA0000299.md): Impulse Coupling · loose · Apr 19, 2012 · N245MA · Piper PA32R301T · Magneto/Distributor > DURING 500 HOUR INSPECTION OF MAGNETO SB 1-86B IMPULSE COUPLING INSPECTION. FOUND A LOOSE RIVET. - [SDR 2011FA0000085](https://openairdocs.org/sdr/2011FA0000085.md): Structure · cracked · Jan 26, 2011 · N642JF · Piper PA32R301 · Ailerons > WHILE PERFORMING MANDATORY SB 1216A OF AILERON RIB INSP, THE MECHANIC FOUND A CRACK ON THE RT OTBD L/E AT COUNTER WEIGHT ATTACH POINT. - [SDR 2010FA0000596](https://openairdocs.org/sdr/2010FA0000596.md): Mechanism · burned · Jun 8, 2010 · N245MA · Piper PA32R301T · Magneto/Distributor > PILOT REPORTED ROUGH RUNNING ENGINE. AFTER INSPECTION OF BOTH MAGNETOS, IT WAS FOUND THAT THE INTERNAL PARTS WERE BURNED AND DETERIORATED. THIS CONDITION WAS FOUND AT 225 HRS AFTER THE 500 HR INSP. BOTH MAGNETOS DID OT REACH THE 500 HR INTERVAL. - [SDR 2010FA0000597](https://openairdocs.org/sdr/2010FA0000597.md): Magneto · burned · Jun 8, 2010 · N245MA · Piper PA32R301T · Magneto/Distributor > PILOT REPORTED ROUGH RUNNING ENGINE. AFTER INSPECTION OF BOTH MAGNETOS, IT WAS FOUND THAT THE INTERNAL PARTS WERE BURNED AND DETERIORATED. THIS CONDITION WAS FOUND AT 225 HRS AFTER THE 500 HR INSP. BOTH MAGNETOS DID OT REACH THE 500 HR INTERVAL. - [SDR 2010FA0001105](https://openairdocs.org/sdr/2010FA0001105.md): Landing Gear · distorted · Apr 18, 2010 · N4168S · Piper PA32R301T · Nose/Tail Landing Gear > DAMAGE OCCURRED TO NLG SUPPORT STRUCTURE DURING THE RETRACT CYCLE OF MLG AFTER TAKEOFF. FULL (OR CLOSE TO FULL) RUDDER CONTROL IMPUTED DURING THIS CYCLE. A LOUD BANG WAS HEARD DURING CYCLE. GEAR UP & SUBSEQUENT GEAR EXTENSION CYCLE NORMAL. UPON INSPECTION O - [SDR 2007FA0000873](https://openairdocs.org/sdr/2007FA0000873.md): Magneto · damaged · Aug 27, 2007 · N691MA · Piper PA32R301T · Magneto/Distributor > THIS AIRCRAFT HAD A SET OF MAGS INSTALLED AT APPROXIMATELY 400 HRS TT, AT 596 HRS TT, INSTALLED ANOTHER O/H MAG ON THE LT, DUE TO AN OVERHEAT SITUATION. IT APPEARS THAT THE COIL HAS BROKEN DOWN DUE TO EXCESS HEAT, DURING NORMAL OPERATION. NEW AC SHOULD HAVE - [SDR 2007FA0000218](https://openairdocs.org/sdr/2007FA0000218.md): Baffle · cracked · Feb 2, 2007 · N447KC · Piper PA32301 · Reciprocating Engine Oil System > DURING ENGINE OIL CHANGE FOUND RIVET HEAD IN OIL SUMP SCREEN. REMOVED ENGINE AND OIL SUMP ASSY. FOUND OIL SUMP BAFFLE ASY RIVETS SHEARED OFF AND ATTACH HOLES BROKEN OUT AND BAFFLE ASSY CRACKED. RETRIEVED RIVET STEMS AND HEADS. REMOVED AND REPLACED OIL SUMP - [SDR 2006FA0000965](https://openairdocs.org/sdr/2006FA0000965.md): Pressure Switch · failed · Sep 2, 2006 · N98LA · Piper PA32R301T · Landing Gear Retraction/Extension System > AT AN ANNUAL INSPECTION IT WAS NOTED THE MAIN GEAR FAILED TO CYCLE COMPLETELY BEFORE PUMP SHUT OFF. PUMP CYCLED ON AND OFF UNTIL MAINS WERE FULLY RETRACTED. PUMP THEN REMAINED OFF. PRESSURE SHUT OFF SWITCH WAS CHECKED WITH A HIGH PRESSURE GAUGE AND IT WAS F ## 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 = 'TIO540AH1A' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/engine/lycoming-tio-540-ah1a/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.