# Service difficulty reports: Lycoming O-540-B4B5 A list on [Lycoming O-540-B4B5](https://openairdocs.org/engine/lycoming-o-540-b4b5.md). Newest first. General aviation reporting is voluntary. - [SDR 9VNR20200929001](https://openairdocs.org/sdr/9VNR20200929001.md): Bolt · sheared · Sep 28, 2020 · N9394W · Piper PA28235 · Propeller Assembly > OWNER REPORTED OIL LEAK IN FRONT END OF ENGINE. UPON INVESTIGATION IT APPEARED TO BE SHAFT SEAL LEAK. REMOVED PROPELLER SPINNER AND FOUND TWO (2) BOLTS SHEARED IN PROPELLER FLANGE. REMOVED PROPELLER AND DISCOVERED PROPELLER SEAL BETWEEN PROPELLER FLANGE AND - [SDR 2020FA0000219](https://openairdocs.org/sdr/2020FA0000219.md): Bolt · broken · Apr 10, 2020 · N15537 · Piper PA28235 · Main Landing Gear Strut/Axle/Truck > AFTER LANDING, THE AIRCRAFT WAS ON ROLLOUT AND SLOWING WHEN THE AIRCRAFT LOST DIRECTIONAL CONTROL DUE TO THE RH MLG TURNING AFTER TORQUE LINK BOLT HAD BROKEN. - [SDR CA160118015](https://openairdocs.org/sdr/CA160118015.md): Casting · broken · Jan 15, 2016 · Maule M7235B · Nose/Tail Landing Gear Attach Section > (CAN) THE MAINTENANCE CREW FOUND THE LOWER1/2 OF THE 3200B SERIES TAIL WHEEL ON THE RUNWAY. IT HAD SEPARATED AT TAKE OFF. THE PILOT LANDED LATER AFTER BEING NOTIFIED BY THE CONTROL TOWER. THE PLANE WAS TAKEN TO MAINTENANCE WHERE IT WAS DISCOVERED THAT THE CENT - [SDR 2015FA0000523](https://openairdocs.org/sdr/2015FA0000523.md): Impulse Coupling · broken · Nov 2, 2015 · N55049 · Piper PA28235 · Magneto/Distributor > LEFT MAG IMPULSE COUPLING BROKE, JAMMING THE MAGNETOS DRIVE SHAFT KEEPING IT FROM TURNING. THE MAG FAILURE ALSO CAUSED THE CRANKSHAFT ALIGNMENT PIN TO BREAK OFF AND BACK OUT HE CRANKSHAFT BOLT. THIS MAGNETO HAD AN AD 99-04-04 THAT WAS NEVER COMPLIED WITH EVE - [SDR CA140717001](https://openairdocs.org/sdr/CA140717001.md): Vent · kinked · Jul 11, 2014 · Piper PA28235 · Reciprocating Engine Oil System > (CAN) DURING ENGINE TROUBLESHOOTING, NOTED ENGINE CRANKCASE BREATHER RUBBER COUPLING KINKED AND RESTRICTING VENTING ALONG WITH BREATHER ALTERNATE AIR OUTLET COVERED BY NO APPROVED SCREEN. ENGINE CRANKCASE BREATHER TUBE COUPLING REPLACED AND FREEDOM VERIFIED. C - [SDR 2012FA0000524](https://openairdocs.org/sdr/2012FA0000524.md): Engine · power loss · Jul 23, 2012 · N7313Z · Piper PA25235 · Engine (Reciprocating) > DURING BANNER TOW OPERATIONS, IN CRUISE FLIGHT AT APPROX 600' AGL, THE PILOT REPORTED THAT THE ENGINE STARTED TO SHUTTER VIOLENTLY AND SUBSEQUENTLY BEGAN TO RAPIDLY LOSE POWER. CARBURETOR HEAT WAS APPLIED WITH NO EFFECT. THE PILOT WAS FORCED TO PERFORM EMERGEN - [SDR 2008FA0000191](https://openairdocs.org/sdr/2008FA0000191.md): Float · bent · Mar 31, 2008 · N249RD · Maule M7235C · Fuel Control/Reciprocating Engines > CARBURETOR FLOAT PN 30-802 PLASTIC FLOAT, THE CARBURETOR HAD A HIGH FLOAT LEVEL TWICE AFTER SETTING THE FLOAT TO SPEC IAW MM. THE FLOAT WAS REMOVED DUE TO THE FLOAT LEVER TANG WAS BENDING UNDER NORMAL USE CONTACTING THE NEEDLE VALVE AND RESULTING IN A HIGH FLO - [SDR 2004FA0000642](https://openairdocs.org/sdr/2004FA0000642.md): Impulse Coupling · broken · Jun 1, 2004 · N4355F · Piper PA28235 · Magneto/Distributor > IMPULSE COUPLING FAILED LOCKING MAGNETO, RESULTING IN FAILURE OF GEARS IN ACCESSORY CASE, PN 13S18647, 71652 AND LW-19096 GEARS. FAILURE OCCURRED WHILE FLYING IN PATTERN. (EA23200400620) - [SDR 2003FA0001052](https://openairdocs.org/sdr/2003FA0001052.md): Fitting · damaged · Aug 11, 2003 · N711BZ · Socata RALLYE235E · Nose/Tail Landing Gear > NOSE WHEEL SHIMMY, GROUND HANDLING AND HARD LANDING. THE RT FITTING PN 880.21.0.456.2 ALSO MADE FROM THE SAME MATERIAL AND SUBJECT TO THE SAME LOADS. - [SDR 2002FA0000873](https://openairdocs.org/sdr/2002FA0000873.md): Spar · cracked · Jul 26, 2002 · N8536N · Piper PA28235 · Wing Spar > DURING ANNUAL INSPECTION SB1006 PERFORMED. FOUND CRACKS AND CORROSION IN AFT REAR SPAR FLANGE-APPROX 3 INCHES OUTBOARD OF LANDING GEAR ATTACH. CAUSE DUE TO STANDING WATER IN WING. FIX BY ADDING DRAIN HOLE IN THIS AREA. - [SDR AU000291](https://openairdocs.org/sdr/AU000291.md): Fuel Tank · contaminated · Mar 1, 2000 · Piper PA28235 · Aircraft Fuel System > (AUS) AIRCRAFT FUEL SYSTEM CONTAMINATED WITH ETHYLENE DIAMINE (EDA). - [SDR 98ZZZX3028](https://openairdocs.org/sdr/98ZZZX3028.md): Impulse Coupling · worn · Aug 3, 1998 · Piper PA28235 · Magneto/Distributor > REMOVED LEFT MAGNETO FOR INSPECTION. DURING PROCESS OF INSPECTING COUPLING ASSY, NOTICED THE COILED SPRING SHOWING SIGNS OF ABNORMAL WEAR NEAR THE CONNECTING PORTION OF SPRING TO THE POST OF HOUSING. SPRING IS WEARING ON CENTER POST OF PAWL ASSEMBLY. NO ABN - [SDR AU971591](https://openairdocs.org/sdr/AU971591.md): Seat Track · corroded · Dec 30, 1997 · Piper PA28235 · Fuselage, Seat/Cargo Attach Fittings > (AUS) RH OUTBOARD SEAT TRACK CONTAINED EXFOLIATION CORROSION. - [SDR CA970604007](https://openairdocs.org/sdr/CA970604007.md): Low Stop · wrong part · May 29, 1997 · Piper PA28235 · Propeller Hub Section > (CAN) PROPELLER RECEIVED FOR CORROSION INSPECTION. INSPECTION FOUND AN INCORRECT STOP INSTALLED. LOW STOP NUT WOULD NOT LOCK. A LONGER STOP WAS INSTALLED. - [SDR 96ZZZX5485](https://openairdocs.org/sdr/96ZZZX5485.md): Pump · failed · Oct 15, 1996 · N4232T · Piper PA28235 · Reciprocating Engine Oil System > DURING OVERHAUL DISASSEMBLY OF OIL PUMP, DISCOVERED WOODRUFF KEY DRIVE SHAFT AND SINTERED IRON GEARS. AD 75-08-09 REQUIRES REMOVAL OF THIS STYLE, BUT THIS SERIAL NUMBER IS OUTSIDE OF THOSE SPECIFIED BY LYCOMING. AD 81-18-04 CALLS FOR REPLACEMENT AT 2,000 HRS - [SDR AU960471](https://openairdocs.org/sdr/AU960471.md): Rib · corroded · Apr 11, 1996 · Piper PA28235 · Trailing Edge Flaps > (AUS) RH WING FLAP HAS EXTENSIVE CORROSION BETWEEN THE STEEL ATTACHMENT BRACKETS AND THE INTERNAL NOSE RIBS - ALL RIBS HAD PARTED FROM THE ATTACHMENT BRACKETS - THE TRAILING SKIN RIB SITUATED UNDER AND ON THE OUTER END OF THE STRENGTHENED WALKWAY PORTION OF TH - [SDR AU960472](https://openairdocs.org/sdr/AU960472.md): Rib · corroded · Apr 11, 1996 · Piper PA28235 · Trailing Edge Flaps > (AUS) LH WING FLAP HAS EXTENSIVE CORROSION MAINLY BETWEEN THE STEEL ATTACHMENT BRACKETS AND INTERNAL NOSE RIBS - ALL OF WHICH HADDEPARTED FROM THEIR ATTACHING SURFACES DUE TO THE CORROSION - SEEMDR 96/0471 FOR FURTHER INFORMATION ## 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 = 'O540B4B5' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/engine/lycoming-o-540-b4b5/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.