# Service difficulty reports: Lycoming IO-540-T4B5 A list on [Lycoming IO-540-T4B5](https://openairdocs.org/engine/lycoming-io-540-t4b5.md). Newest first. General aviation reporting is voluntary. - [SDR 2018FA0000455](https://openairdocs.org/sdr/2018FA0000455.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 CA131022004](https://openairdocs.org/sdr/CA131022004.md): Bolt · sheared · Oct 3, 2013 · Gulstm 114B · Landing Gear Actuator > (CAN) AT THE ANNUAL INSPECTION THE NOSE GEAR WAS INSPECTED THE UPPER BOLT THAT HOLDS THE NOSE GEAR ACTUATOR IN PLACE WAS SHEARED BUT STILL IN PLACE. THE LOWER BOLT WAS BENT. NEW BOLTS INSTALLED, AN4-10 BOLTS, ACFT RETURNED TO SERVICE. - [SDR CA130618004](https://openairdocs.org/sdr/CA130618004.md): Drag Link · broken · Jun 13, 2013 · Gulstm 114B · Landing Gear Actuator > (CAN) DURING TAKEOFF THE OWNER REPORTED WHEN GEAR WAS SELECTED UP THE LT AND RT MAIN GEAR CAME UP BUT THE NOSE GEAR STILL INDICATED DOWN AND LOOKED. THE PILOT SELECTED GEAR DOWN AND THE MAINS CAME DOWN AND LOOKED AND THE NOSE GEAR REMAINED DOWN AND LOOKED, TH - [SDR 2011FA0000488](https://openairdocs.org/sdr/2011FA0000488.md): Diode · burned out · Jun 18, 2011 · N115CK · Gulstm 114B · Air Conditioning System Wiring > AIR CONDITIONING/ALTERNATOR NR 2 SYS PROBLEM GENERATED SMOKE IN THE COCKPIT. ACFT PERFORMED PRECAUTIONARY LANDING. PROBLEM WAS IDENTIFIED BY MX AND SYS WAS DISABLED AND PLACARDED "INOPERATIVE" FOR A FLT TO HAVE ADDITIONAL REPAIRS MADE. TROUBLESHOOTING REVEA - [SDR 2011FA0000156](https://openairdocs.org/sdr/2011FA0000156.md): Spar · cracked · Mar 4, 2011 · N4732W · Gulstm 114 · Elevator, Spar/Rib > DURING THE ACCOMPLISHMENT OF SL-114-17 A SMALL HAIRLINE CRACK WAS DISCOVERED. THE CRACK IS APPROX. 2.35" IN LENGTH, ON THE RT ELEVATOR SPAR, BELOW THE OUTBOARD ELEVATOR HINGE ATTACH POINT. THE AREA OF CONCERN IS LOCATED ON THE RH ELEVATOR 69.35 FROM C/L & FS 2 - [SDR 2004FA0000398](https://openairdocs.org/sdr/2004FA0000398.md): Strap · cracked · Mar 17, 2004 · N969WC · Micco MAC145A · Wing Miscellaneous Structure > DURING AN ANNUAL INSPECTION THE BUTT WELDS IN THE LOWER MAIN SPAR REINFORCEMENT STRAP, APPROX 3.25 INCHES IB FROM EACH END OF THE REINFORCEMENT STRAP, DO NOT HAVE PROPER PENETRATION AND ARE CRACKED THRU THE WELD. MFG WAS CONTACTED AND REPAIR INSTRUCTIONS WERE - [SDR 2004FA0000400](https://openairdocs.org/sdr/2004FA0000400.md): Attach Bracket · cracked · Mar 17, 2004 · N969WC · Micco MAC145A · Wing, Attach Fittings > DURING AN ANNUAL INSPECTION THE WELD JOINT THAT ATTACHES THE UPPER WING SKIN ATTACH BRACKET TO THE UPPER MAIN WING SPAR CENTER SECTION JUST ABOVE THE UPPER LT WING ATTACHMENT FITTING WAS CRACKED. MANUFACTURER WAS CONTACTED AND REPAIR INSTRUCTIONS WERE PROVIDE - [SDR QC42002F00001](https://openairdocs.org/sdr/QC42002F00001.md): Housing · cracked · Nov 26, 2002 · N526AW · Gulstm 114 · Engine Cranking > THE BENDIX DRIVE HOUSING CRACKED COMPLETELY THROUGH AND THE FORWARD BEARING SECTION FELL OFF THE AIRCRAFT. IAW LOG BOOKS, THIS STARTER HAS BEEN OVERHAULED TWICE WITHIN 240 HOURS OF OPERATION. THE LOGS DO NOT STATE THE REASON FOR THE OVERHAULS. - [SDR YBU2002F00000](https://openairdocs.org/sdr/YBU2002F00000.md): Brace · cracked · Nov 22, 2002 · N5832N · Gulstm 114 · Landing Gear Retraction/Extension System > PILOT REPORTED NORMAL LANDING. THEN LOST CONTROL OF AIRCRAFT. AIRCRAFT CAME TO REST OFF THE LT SIDE OF THE RUNWAY, LT MAIN GEAR COLLAPSED. LT MAIN GEAR, UPPER DRAG BRACE SPLIT IN TWO. SUSPECTED METAL FAILURE, DUE TO IMPURTIES AND FATIGUE. - [SDR AUS20021238](https://openairdocs.org/sdr/AUS20021238.md): Bolt · broken · Oct 24, 2002 · Gulstm 114 · Nose/Tail Landing Gear Attach Section > (AUS) NOSE LANDING GEAR ACTUATOR REAR MAIN ATTACHMENT BOLT BROKEN INAREA OF SHAFT. - [SDR AUS20011280](https://openairdocs.org/sdr/AUS20011280.md): Control Cable · misinstalled · Nov 29, 2001 · Gulstm 114 · Rudder Control System > (AUS) LT RUDDER CONTROL CABLE INCORRECTLY ROUTED UNDER SUPPORT BRACKET. CABLE RUBBING ON PULLEY SUPPORT BRACKET. ELEVATOR TRIM CABLE ALSO INCORRECTLY ROUTED AND FOULING ON STRUCTURE. PERSONNEL/MAINTENANCE ERROR. - [SDR 20001220SH005](https://openairdocs.org/sdr/20001220SH005.md): Gear · worn · Sep 23, 2000 · N664H · Gulstm 114B · Magneto/Distributor > NYLON DRIVE GEAR WORN AND DECOMPOSED DUE TO WATERY CHEMICAL WITHIN MAGNETO CASE. COULD HAVE BEEN CAUSED BY A PRESSURE WASHER AFTER AN OIL CHANGE OR OTHER SERVICE OR MAINTENANCE. (X) - [SDR AU000555](https://openairdocs.org/sdr/AU000555.md): Bolt · separated · Feb 29, 2000 · Gulstm 114 · Landing Gear Retraction/Extension System > (AUS) NOSE LANDING GEAR RETRACTION RAM TO NOSE LANDING GEAR STRUT SEPARATED DUE TO BOLT, NUT, WASHER AND SPLIT PIN SECURING THE TWO ITEMS COMING LOOSE. - [SDR AU000179](https://openairdocs.org/sdr/AU000179.md): Bolt · broken · Feb 10, 2000 · Gulstm 114 · Main Landing Gear Attach Section > (AUS) MAIN LANDING GEAR STRUT TRUNNION PIN RETAINING BOLT CRACKED. TRUNNION PIN ALSO WORN. - [SDR AU990822](https://openairdocs.org/sdr/AU990822.md): Crankcase · cracked · Jul 16, 1999 · Reciprocating Engine Power Section > (AUS) CRANKCASE CRACKED. CAMSHAFT LOBES CRACKED. - [SDR AU990823](https://openairdocs.org/sdr/AU990823.md): Cylinder · cracked · Jul 16, 1999 · Reciprocating Engine Cylinder Section > (AUS) TWO CYLINDERS CRACKED IN THE AREA OF THE EXHAUST PORTS. - [SDR AU970314](https://openairdocs.org/sdr/AU970314.md): Mount · broken · Mar 24, 1997 · Gulstm 114 · Engine Mount Section > (AUS) ENGINE MOUNT ASSEMBLY TUBE CRACKED AT LH NLG TRUNNION - TRUNNION PIN DEFORMED - AIRCRAFT USED FOR PILOT TRAINING - [SDR AU961014](https://openairdocs.org/sdr/AU961014.md): Relay · mis wired · Jun 27, 1996 · Gulstm 114 · DC Regulator > (AUS) OVERVOLTAGE RELAY INCORRECTLY WIRED - 'BATTERY' AND 'LOAD' LEADS TRANSPOSED CAUSING OVERVOLTAGE RELAY TO MALFUNCTION - LOSS OF BATTERY VOLTAGE - LOGBOOK FAILED TO REVEAL ANY WORK CARRIED OUT IN THIS AREA - PERSONNEL/MAINTENANCE ERROR ## 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 = 'IO540T4B5' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/engine/lycoming-io-540-t4b5/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.