# Service difficulty reports: Lycoming IO-540-W1A5 A list on [Lycoming IO-540-W1A5](https://openairdocs.org/engine/lycoming-io-540-w1a5.md). Newest first. General aviation reporting is voluntary. - [SDR 2018FA0000456](https://openairdocs.org/sdr/2018FA0000456.md): Servo · failed · Jul 9, 2018 · N56681 · Maule MX7235 · Fuel Control/Reciprocating Engines > WITH A FACTORY OVERHAULED ENGINE, THE FUEL SERVO FAILED AFTER 32.4 HOURS. AFTER REPAIRED IT LASTED 12.2 HOURS. THEN INSTALLED A NEW SERVO AND IT ONLY LASTED 3 HOURS. ALL THREE FAILURES WERE THE SAME, THE MIXTURE SHAFT CAME OUT SLIGHTLY CAUSING A MISALIGNMEN - [SDR CA090310012](https://openairdocs.org/sdr/CA090310012.md): Hub · unserviceable · Mar 10, 2009 · Maule M7235 · Propeller Hub Section > (CAN) CORROSION PITS FOUND IN ONE BRG SEAT AREA. HUB IS UNSERVICEABLE IAW MANUAL NR SPM100-1. - [SDR CA090310011](https://openairdocs.org/sdr/CA090310011.md): Blade · corroded · Mar 9, 2009 · Maule M7235C · Propeller Blade Section > (CAN) UPON LPI INSP OF INTERNAL BORE OF BLADE, IT WAS FOUND THAT THERE WAS CORROSION COVERING MOST OF THE BORE SURFACE. MANUAL NR BOM100-1 ALLOWS REWORK OF 10 PERCENT OF THE SURFACE AREA. BLADE IS UNSERVICEABLE. - [SDR 2006FA0000569](https://openairdocs.org/sdr/2006FA0000569.md): Screw · loose · Jun 6, 2006 · N116CP · Maule MT7235 · Magneto/Distributor > CHECKED TIMING BOTH WERE OUT OF TIME. REMOVED BOTH MAGS, THE PIVOT SCREW WAS LOOSE. REPLACED POINTS & CAP, WITH 500 HR INSP. BOTH MAGS WERE INSTALLED NEW IN 04/2002 AT 46.1 TT. - [SDR 2006FA0000053](https://openairdocs.org/sdr/2006FA0000053.md): Piston · broken · Jan 7, 2006 · N9234N · Maule M7235 · Reciprocating Engine Power Section > INSPECTION OF THE OIL FILTER DURING ROUTINE OIL CHANGE FOUND 2 EA (.1250 INCH) DIAMETER PIECES OF ALUMINUM. FURTHER DISASSEMBLY OF THE ENGINE/ CYLINDERS FOUND THE NR 1 CYLINDER PISTON SKIRT WAS MISSING A SECTION (.5 INCH X 1.1250 INCH LONG). PERFORMED A DY P - [SDR AU510001778](https://openairdocs.org/sdr/AU510001778.md): Bolt · wrong part · Aug 8, 2005 · Maule MT7235 · Main Landing Gear Strut/Axle/Truck > MAIN LANDING GEAR BOLT INCORRECT PART. BOLT IS AN AN7-24 TYPE ITEM. - [SDR AK02003F00000](https://openairdocs.org/sdr/AK02003F00000.md): Duct · broken · Nov 5, 2003 · N138CP · Maule MT7235 · Engine Collector/Tailpipe/Nozzle > DURING AN ANNUAL INSPECTION THE ALTERNATE AIR INTAKE DUCT WAS FOUND BROKEN OFF OF THE LEFT EXHAUST MUFFLER AT THE WELD. THE DUCT AND HOSE WAS FOUND CHAFING AGAINST THE ENGINE MOUNT TUBULAR STRUCTURE. THIS FAILURE WAS CAUSED BY AN INADEQUATE MEANS OF SUPPORTI - [SDR AK02003F00001](https://openairdocs.org/sdr/AK02003F00001.md): Shroud · chafed · Nov 5, 2003 · N138CP · Maule MT7235 · Engine Collector/Tailpipe/Nozzle > DURING AN ANNUAL INSPECTION THE RIGHT EXHAUST MUFFLER SHROUD WAS FOUND CONTACTING THE NR 3 CYLINDER INTAKE TUBE. IT APPEARS THAT DURING THE AIRCRAFT ASSEMBLY, THE EXHAUST MUFFLER SHROUD IS ATTACHED TO THE MUFFLER PRIOR TO INSTALLING ON THE ENGINE. DURING THE - [SDR 2001FA0000455](https://openairdocs.org/sdr/2001FA0000455.md): Cylinder · separated · Oct 9, 2001 · N390AT · Maule MT7235 · Reciprocating Engine Cylinder Section > CRUISE FLIGHT. SUSPECT MFG DEFECTIVE CYLINDER WALL. NITRIDE CYLINDER. CYLINDER SEPARATION. - [SDR AU980924](https://openairdocs.org/sdr/AU980924.md): Tube · cracked · Aug 4, 1998 · Maule M7235 · Horizontal Stabilizer, Spar/Rib > (AUS) RIGHT TAILPLANE LEADING EDGE TUBE CRACKED FOR APPROXIMATELY 60 PERCENT OF THE CIRCUMFERENCE. AIRCRAFT OPERATES AS A FLOAT PLANE. - [SDR AU981110](https://openairdocs.org/sdr/AU981110.md): Spar · corroded · Jul 18, 1998 · Maule M7235 · Rudder, Spar/Rib > (AUS) RUDDER POST CORRODED INTERNALLY. AIRCRAFT IS A FLOAT PLANE AND THE SALT WATER ENTERS THE RUDDER POST THROUGH THE RUDDER TAB CABLE CASING. PART TC: 390. - [SDR AU981111](https://openairdocs.org/sdr/AU981111.md): Spar · corroded · Jul 18, 1998 · Maule M7235 · Vertical Stabilizer, Spar/Rib > (AUS) FIN POST SUSPECT INTERNAL CORROSION. WATER CAN ENTER THE POST VIA THE TRIM TAB CONTROL CONDUIT. AIRCRAFT OPERATES AS A FLOAT PLANE. PART TC: 390. - [SDR 97ZZZX4209](https://openairdocs.org/sdr/97ZZZX4209.md): Magneto · case cracked · Sep 11, 1997 · N56464 · Maule M6235 · Magneto/Distributor > MAGNETO CASE BROKEN AT TOP HOLD-DOWN LOCATION. DISCREPANCY DISCOVERED DURING 100-HOUR INSPECTION. - [SDR 97ZZZX3411](https://openairdocs.org/sdr/97ZZZX3411.md): Filter · leaks · Jul 16, 1997 · N91AR · Maule M6235 · Reciprocating Engine Oil System > OIL FILTER WAS INSTALLED ON 6-28-97. NOTED AT THE TIME THAT THE LOCKING TAB WAS NEARLY FLAT AGAINST THE BOWL OF THE CANNISTER, SUCH THAT THE TAB HAD TO BE BENT SLIGHTLY TO ADMIT.032 INCH SAFETY WIRE. NO LEAKS WERE FOUND AFTER A GROUND RUN-UP. AFTER 3 HOURS - [SDR CA961030003](https://openairdocs.org/sdr/CA961030003.md): Pressure Sensor · failed · Oct 9, 1996 · Maule M7235 · Engine Oil Indicating System > (CAN) AIRCRAFT LOST ALL OIL IN FLIGHT DUE TO HOBBS METER PRESSURE SENSOR FAILURE. - [SDR 97ZZZX190](https://openairdocs.org/sdr/97ZZZX190.md): Lifter · spalled · Oct 3, 1996 · N5643N · Maule M5235C · Reciprocating Engine Power Section > DURING ANNUAL INSPECTION FOUND STEEL IN OIL FILTER. ENGINE DISASSEMBLED, ALL LIFTERS AND CAMSHAFT BADLY SPALLED. THESE COMPONENTS HAD A TT OF 383 HRS SINCE REGRIND AND AEROLUBE PROVIDED BY AIR SUPPORT INTERNATIONAL. ## 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 = 'IO540W1A5' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/engine/lycoming-io-540-w1a5/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.