# Lycoming AEIO-540-D4D5 - Type: Engine model (FAA registry) - Registry code: 41802 - Manufacturer (registry): LYCOMING - Model: AEIO-540-D4D5 - Engine type: Reciprocating - Power: 260 hp - Data sheet: [TCDS 1E4](https://openairdocs.org/tcds/1E4) (OpenAirDocs) - Holder: Lycoming Engines - Installed in: 0 registered aircraft - Page: https://openairdocs.org/engine/lycoming-aeio-540-d4d5 Model codes come from the FAA registry's reference file. ## ADs that may apply (OpenAirDocs) Matched to this engine model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment. - [AD 2026-04-11](https://openairdocs.org/ad/2026-04-11): Engine (Reciprocating) · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 605 more. Effective Apr 8, 2026 - [AD 2015-19-07](https://openairdocs.org/ad/2015-19-07): Fuel injector fuel lines · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1B and 187 more. Effective Nov 3, 2015 - [AD 2015-02-07](https://openairdocs.org/ad/2015-02-07): Propeller governor shaft set screw · Lycoming Engines AEIO-320-D1B, AEIO-360-A1E, AEIO-360-A1E6 and 10 more. Effective Mar 11, 2015 - [AD 2012-19-01](https://openairdocs.org/ad/2012-19-01): Crankshafts · Lycoming Engines AEIO-360-A1A, AEIO-360-A1B, AEIO-360-A1B6 and 321 more. Effective Oct 24, 2012 - [AD 2012-03-06](https://openairdocs.org/ad/2012-03-06): Fuel servo diaphragm · Continental Motors 6-260-A, 6-285-A, 6-285-B and 482 more. Effective Feb 24, 2012 - [AD 2009-26-12](https://openairdocs.org/ad/2009-26-12): Cylinder assemblies · Engine Components Reciprocating Engine Cylinder Assemblies, AEIO-320-D1B, AEIO-320-D2B and 264 more. Effective Feb 4, 2010 - [AD 2009-02-03](https://openairdocs.org/ad/2009-02-03): Fuel injection servos · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 261 more. Effective Feb 9, 2009 - [AD 2007-04-19 R1](https://openairdocs.org/ad/2007-04-19-R1): SAP cylinder assemblies · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 314 more. Effective May 7, 2007 - [AD 2006-12-07](https://openairdocs.org/ad/2006-12-07): ECi cylinder assemblies · Aerostar AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 386 more. Effective Jul 11, 2006 - [AD 2006-10-21](https://openairdocs.org/ad/2006-10-21): ECi connecting rods · Engine Components Reciprocating Engine Connecting Rods, AEIO-360-B1B, AEIO-360-B1D and 171 more. Effective Jun 22, 2006 - [AD 2005-12-06](https://openairdocs.org/ad/2005-12-06): Riveted-impulse coupling assemblies and snap-ring coupling assemblies · Lycoming Engines AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 154 more. Effective Jul 19, 2005 - [AD 2004-10-14](https://openairdocs.org/ad/2004-10-14): Crankshaft gear · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 642 more. Effective Jun 25, 2004 - [AD 2004-05-24](https://openairdocs.org/ad/2004-05-24): Zinc-plated Crankshaft Gear Retaining Bolts · Lycoming Engines AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 161 more. Effective Mar 30, 2004 - [AD 2003-14-03](https://openairdocs.org/ad/2003-14-03): Rotary fuel pumps · Lycoming Engines AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 262 more. Effective Aug 14, 2003 - [AD 97-15-11](https://openairdocs.org/ad/97-15-11): Cylinder kits · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 538 more. Effective Aug 12, 1997 - [AD 96-23-03](https://openairdocs.org/ad/96-23-03): High pressure fuel pumps · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 174 more. Effective Dec 23, 1996 - [AD 92-12-05](https://openairdocs.org/ad/92-12-05): Piston Pins · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 532 more. Effective Jul 10, 1992 Historical (superseded or no longer in force): - [AD 2024-21-02](https://openairdocs.org/ad/2024-21-02) (historical): Engine (Reciprocating) · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 548 more. Effective Dec 5, 2024 - [AD 2011-26-04](https://openairdocs.org/ad/2011-26-04) (historical): Externally mounted fuel injector fuel lines · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1B and 186 more. Effective Jan 25, 2012 - [AD 2011-15-10](https://openairdocs.org/ad/2011-15-10) (historical): Fuel servos · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 256 more. Effective Aug 16, 2011 - [AD 2008-19-05](https://openairdocs.org/ad/2008-19-05) (historical): Parallel Valve'' reciprocating engines · Engine Components Reciprocating Engine Cylinder Assemblies, AEIO-320-D1B, AEIO-320-D2B and 262 more. Effective Oct 20, 2008 - [AD 2008-14-07](https://openairdocs.org/ad/2008-14-07) (historical): Externally mounted fuel injector fuel lines · Textron Lycoming, AVCO AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1B and 185 more. Effective Aug 14, 2008 - [AD 2008-08-14](https://openairdocs.org/ad/2008-08-14) (historical): Fuel injection servo plugs · Superior Air Parts AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 242 more. Effective Apr 29, 2008 - [AD 2008-06-51](https://openairdocs.org/ad/2008-06-51) (historical): Fuel injection servo plugs · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 235 more - [AD 2005-26-10](https://openairdocs.org/ad/2005-26-10) (historical): ECi cylinder assemblies. · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 413 more. Effective Jan 31, 2006 - [AD 2002-26-01](https://openairdocs.org/ad/2002-26-01) (historical): Fuel injector fuel lines · Textron Lycoming, AVCO IGO-480-A1B6, IGO-540-B1A, IGO-540-B1C and 178 more. Effective Jan 31, 2003 - [AD 2002-23-06](https://openairdocs.org/ad/2002-23-06) (historical): Crankshaft gear retaining bolts · Textron Lycoming, AVCO AEIO-540, AEIO-540-D4A5, AEIO-540-D4B5 and 46 more. Effective Nov 19, 2002 ## Information bulletins (advisory) (6) - [SAIB NE-19-08](https://openairdocs.org/saib/NE-19-08): Reciprocating Engine Cylinder Section - Lycoming Engines Parallel Valve Cylinders. Issued May 2, 2019 - [SAIB NE-08-32R1](https://openairdocs.org/saib/NE-08-32R1): Propeller Governor Idler Gear Shaft Set Screw. Issued May 13, 2016 - [SAIB NE-14-13](https://openairdocs.org/saib/NE-14-13): Reciprocating Engine - Cylinder Mounting Studs. Issued Mar 24, 2014 - [SAIB NE-09-04](https://openairdocs.org/saib/NE-09-04): Fuel Control/Reciprocating Engines. Issued Jan 10, 2009 - [SAIB NE-06-32R1](https://openairdocs.org/saib/NE-06-32R1): Reciprocating Engine - Crankshaft. Issued Sep 10, 2008 - [SAIB NE-08-32](https://openairdocs.org/saib/NE-08-32) (historical): Propeller Governor Set Screw. Issued Jul 3, 2008 ## Registered aircraft None registered with this engine model now. ## NTSB investigations None matched to aircraft with this engine model. ## FAA accident and incident reports None matched to aircraft with this engine model. ## Service difficulty reports (129, newest 50) As reported by operators and repair stations, by the model named in the report. - [SDR CA190611008](https://openairdocs.org/sdr/CA190611008), Jun 11, 2019: INERTIA REEL. INOPERATIVE. (CAN) SHOULDER HARNESS LOCK FAILED. INERTIA LOCK IS STILL FUNCTIONAL BUT THE MANUAL LOCK (FOR AEROBATIC FLIGHT) IS NOT WORKING. HARNESS ASSEMBLY REPLACED. (TC# - [SDR CA190208015](https://openairdocs.org/sdr/CA190208015), Feb 8, 2019: BUCKLE. BROKEN. (CAN) DURING A 200 HR INSPECTION THE AME NOTICED THE SEAT BUCKLE PAD WAS SEPARATED FROM THE BUCKLE AFTER DISASSEMBLY IT WAS NOTICED THAT TWO OF THE 4 ATTACH SCR - [SDR CA160304010](https://openairdocs.org/sdr/CA160304010), Mar 3, 2016: TENSION SPRING. STIFF. (CAN) PILOT REPORTED CONTROL STICK APPEARS EXCESSIVLY STIFF. THIS WAS DETECTED UPON ENTRY IN THE AIRCRAFT PRIOR TO FLIGHT. INSPECTION FOUND THAT THE FWD RUDDER - [SDR 2015FA0000653](https://openairdocs.org/sdr/2015FA0000653), Dec 16, 2015: IGNITION SWITCH. FAILED. PILOT REPORTED SMOKE OUT OF IGNITION SWITCH DURING START UP. INVESTIGATION FOUND THE STARTER SWITCH HAD INTERNALLY ARCED ACROSS THE CONTACTS. - [SDR CA151028005](https://openairdocs.org/sdr/CA151028005), Oct 27, 2015: WIRE. SHORTED. (CAN) ON FINAL APPROACH , THE ALT OFF RED ANNUNCIATOR ILLUMINATED. 5 SECONDS LATER THE Ï¿½VOLTÏ¿½ ANNUNCIATOR ILLUMINATED AS WELL. THE IP NOTED THAT THE BATTERY - [SDR CA150527003](https://openairdocs.org/sdr/CA150527003), May 26, 2015: SPACER. DEFECTIVE. (CAN) AS ACFT STARTED TO TAXI, RUBBING NOISES HEARD FROM COCKPIT & TAXI WAS ABORTED. FOUND THE NOSE WHEEL TILTED OVER, RUBBING ON THE FORK ASSEMBLY. WHEEL & FOR - [SDR CA150106003](https://openairdocs.org/sdr/CA150106003), Jan 2, 2015: RELAY. DAMAGED. (CAN) AVIONICS BUSS 1 AND 2 CONTROL RELAYS FOUND TO BE WIRED INCORRECTLY FROM MANUFACTURE. WIRES FOR CONNECTION 85 WERE ON CONNECTION 86 AND WIRES FROM 86 WERE - [SDR CA140521006](https://openairdocs.org/sdr/CA140521006), May 21, 2014: WIRE HARNESS. BROKEN. (CAN) WIRE FOUND BROKEN DURING FLEET CAMPAIGN TO CHECK FOR BROKEN WIRES. FLAP OPERATED NORMALLY. - [SDR CA140505011](https://openairdocs.org/sdr/CA140505011), Apr 29, 2014: WIRE. BROKEN. (CAN) FLAP STUCK AT FULL FLAP. WOULD NOT MOVE UP OR DOWN. NO INDICATION IN COCKPIT. FOUND WIRE AT SYMMETRY SWITCH BROKEN. THE SYMMETRY UNIT MOVES WITH EACH CYCL - [SDR CA130122003](https://openairdocs.org/sdr/CA130122003), Jan 21, 2013: DRIVE ASSY. MALFUNCTIONED. (CAN) FLAP C/B POPPED OUT WHEN FLAPS SELECTED DOWN ON FINAL. C/B PUSHED BACK IN ON THE GROUND AND FLAPS WERE SELECTED DOWN, THEN UP AND C/B POPPED OUT AGAIN. WE - [SDR CA130117012](https://openairdocs.org/sdr/CA130117012), Jan 17, 2013: DRIVE ASSY. MALFUNCTIONED. (CAN) FLAP SYS VERY SLOW TO OPERATE IN COLD WEATHER, -20C. CURRENT INITIALLY READS 25 AMPS WHILE OPERATING, AFTER A COUPLE CYCLES IT STILL READS 18 AMPS AND SYS - [SDR CA120727003](https://openairdocs.org/sdr/CA120727003), Jul 26, 2012: IGNITION SWITCH. SMOKE. (CAN) PILOT REPORTED SEEING SMOKE COMING FROM THE SWITCH ON START UP. ENGINE SHUTDOWN AND ACFT ROUTED TO MAINTENANCE. NO LOOSE WIRES OR CONNECTIONS FOUND AT SWI - [SDR CA120607008](https://openairdocs.org/sdr/CA120607008), Jun 7, 2012: ACTUATOR. MALFUNCTIONED. (CAN) RT MLG DOWN LOCK INDICATOR SHOWED RED WITH GEAR HANDLE SELECTED IN THE DOWN POSITION. GEAR WAS NOT DOWN AND LOCKED. LANDING OCCURED WITHOUT INCIDENT. ACFT - [SDR CA120412003](https://openairdocs.org/sdr/CA120412003), Apr 11, 2012: SWITCH. FAILED. (CAN) FIRST ATTEMPT, FLAPS DIDNT RETRACT FROM TAKEOFF TO UP POSITION. SECOND ATTEMPT THEY WORKED FINE. 2ND OCCURANCE ON SAME FLIGHT, THE FLAPS DIDNT EXTEND TO T - [SDR CA120322006](https://openairdocs.org/sdr/CA120322006), Mar 22, 2012: DRIVE UNIT. MALFUNCTIONED. (CAN) FLAP C/B TRIPPED. FOUND FLAP DRIVE MOTOR CURRENT TO BE TOO HIGH WHEN CYCLING FLAPS, PARTICULARLY WHEN THE DRIVE MOTOR IS COOL OR COLD. MOTOR WAS ALSO MAKI - [SDR CA120302002](https://openairdocs.org/sdr/CA120302002), Feb 29, 2012: SERVO. MALFUNCTIONED. (CAN) ELECTRIC TRIM KEPT RUNNING FOR 1-2 SECS AFTER RELEASING THE TRIM SWITCH AND KEPT RUNNING EVEN IF HOLDING THE TRIM DISCONNECT. FOUND ELEVATOR TRIM SERVO CL - [SDR CA120203012](https://openairdocs.org/sdr/CA120203012), Feb 2, 2012: SWITCH. CRACKED. (CAN) FLAP CIRCUIT BREAKER POPPED. WHEN FLAPS WERE SELECTED UP, THE FLAPS WORKED FINE. FLAPS WORKED INTERMITTENTLY IN THE DOWNWARDS DIRECTION. REPLACED THE FLAP - [SDR CA120131011](https://openairdocs.org/sdr/CA120131011), Jan 30, 2012: SWITCH. MALFUNCTIONED. (CAN) FLAPS STUCK UP, CIRCUIT BREAKER TRIPPED TWICE. ON GROUND, SELECTING DOWN AND PUTTING IN THE CIRCUIT BREAKER STILL CAUSED BREAKER TO POP. REPLACED UPWARDS - [SDR CA120118002](https://openairdocs.org/sdr/CA120118002), Jan 17, 2012: DRIVE UNIT. FAILED. (CAN) FLAP SYSTEM CIRCUIT BREAKER POPPED WHEN FLAPS OPERATED. TROUBLESHOOTING SHOWED SYS DREW 18 AMPS WHEN COLD SOAKED, OAT -20C. AFTER BEING HEATED IN HANGAR F - [SDR CA120113006](https://openairdocs.org/sdr/CA120113006), Jan 11, 2012: TCAS SYSTEM. MALFUNCTIONED. (CAN) TRAFFIC AVOIDANCE SYSTEM NOT GOING FROM GROUND MODE TO AIR MODE AFTER TAKE- OFF. AIRCRAFT SYSTEM TESTED SERVICEABLE DURING GROUND TESTS. - [SDR CA111213001](https://openairdocs.org/sdr/CA111213001), Dec 7, 2011: WIRE. OUT OF POSITION. (CAN) WIRING TOUCHED THE EXHAUST MANIFOLD. SYS WAS SHORTING & CAUSED THE TAXI LIGHT CB TO POP. THE ROUTING OF THE WIRING & THE LOCATION OF THE TAXI & LANDING LI - [SDR CA111201006](https://openairdocs.org/sdr/CA111201006), Nov 30, 2011: IGNITION SWITCH. MALFUNCTIONED. (CAN) WITH SWITCH IN "BOTH ON" POSITION, STARTER ENGAGES WHEN KEY IS TAPPED/BRUSHED. SWITCH REPLACED, NO FURTHER FAULTS FOUND. TOTAL STARTS ON SWITCH 87. - [SDR CA111122005](https://openairdocs.org/sdr/CA111122005), Nov 22, 2011: CLAMP. OUT OF POSITION. (CAN) THE UPPER AFT SCREW RETAINING PANEL 120A-2812 WAS FOUND TOUCHING A WIRING BUNDLE LOCATED BEHIND THE CENTER CONSOLE PANEL, 120A-2880. WE REPLACED AND REPOS - [SDR CA111109008](https://openairdocs.org/sdr/CA111109008), Nov 9, 2011: CLAMP. OUT OF POSITION. (CAN) THE UPPER AFT SCREW RETAINING PANEL 120A-2812 WAS FOUND TOUCHING A WIRING BUNDLE LOCATED BEHIND THE CENTER CONSOLE PANEL (120A-2880). REPLACED AND REPOSIT - [SDR CA111110003](https://openairdocs.org/sdr/CA111110003), Nov 8, 2011: BRAKE PADS. WORN. (CAN) BRAKE PAD WEAR IS UNEVEN. THE TOP OF THE PADS IS WEARING AT TWICE THE RATE OF THE LOWER PART OF THE PADS. THE PROBLEM APPEARS TO BE THAT THERE IS NOT ENOU - [SDR CA111028003](https://openairdocs.org/sdr/CA111028003), Oct 28, 2011: IGNITION SWITCH. INOPERATIVE. (CAN) ACFT WOULD NOT START. REPLACED SWITCH AND ALL TESTED SERVICEABLE. - [SDR CA111026009](https://openairdocs.org/sdr/CA111026009), Oct 26, 2011: BRAKE PADS. MISINSTALLED. (CAN) BRAKE PAD WEAR IS UNEVEN. THE TOP OF THE PADS IS WEARING AT TWICE THE RATE OF THE LOWER PART OF THE PADS. THE PROBLEM APPEARS TO BE THAT THERE IS NOT ENOU - [SDR CA111026008](https://openairdocs.org/sdr/CA111026008), Oct 25, 2011: ACTUATOR. MALFUNCTIONED. (CAN) WHEN FLAPS ARE SELECTED TO UP, LOUD SCREECHING AND HOWLING SOUNDS COMING FROM THE RT FLAP ACTUATOR. THIS HAPPENS ONLY AT THE LAST 4" OF TRAVEL IN THE UP D - [SDR CA111003009](https://openairdocs.org/sdr/CA111003009), Sep 29, 2011: VENT LINE. LOOSE. (CAN) PILOTS REPORTED FUEL ODOR IN COCKPIT. CHANGED FUEL VENT DRAINS THEN DISCOVERED LT FUEL VENT LINE HAD BEEN LOOSENED OFF DURING MX AND HAD NOT BEEN RETIGHTE - [SDR CA110930005](https://openairdocs.org/sdr/CA110930005), Sep 27, 2011: IGNITION SWITCH. FAILED. (CAN) DURING PRE-INSPECTION GROUND RUN, ENGINE WAS SHUTDOWN IAW CHECK, IGNITION KEY OFF AND MASTER OFF. WHEN POWER MASTER WAS RE-SELECTED ON, THE STARTER ENGAGE - [SDR CA110812005](https://openairdocs.org/sdr/CA110812005), Aug 12, 2011: PUMP. FAILED. FUEL PUMP WAS INSTALLED TO REPLACE ANOTHER PUMP WITH LOW IDLE PRESSURE. ON STARTUP FOR GROUND TEST, IT WAS NOTICED THAT THE PUMP HAD ZERO OUTPUT. ON REMOVAL FOR - [SDR CA110811007](https://openairdocs.org/sdr/CA110811007), Aug 11, 2011: PUMP. MALFUNCTIONED. FUEL PUMP WAS INSTALLED TO REPLACE ANOTHER PUMP WITH LOW IDLE PRESSURE. ON STARTUP FOR GROUND TEST, IT WAS NOTICED THAT THE PUMP HAD ZERO OUTPUT. ON REMOVAL FOR - [SDR 2011FA0000453](https://openairdocs.org/sdr/2011FA0000453), Jul 9, 2011: PUMP. FAILED. PILOT REPORTED LOW FUEL PRESSURE AT 700 RPM, 10-12 PSI. INSTALLED ANOTHER PUMP RAN ACFT OPS CHECKED OK. NO PROBABLE CAUSE OR RECOMMENDATIONS AT THIS TIME. - [SDR CA110412009](https://openairdocs.org/sdr/CA110412009), Apr 11, 2011: WIRE. CHAFED. (CAN) MULTIPLE WIRES ON GROUND BLOCK MODULE VN220 BEHIND THE RT INTRUMENT PANEL WERE FOUND WITH ABRASION DAMAGE CAUSED BY CHAFING ON THE ENGINE INSTRUMENT DISPL - [SDR CA110331027](https://openairdocs.org/sdr/CA110331027), Mar 30, 2011: BUSS. INTERMITTENT. (CAN) BUSS MODULE HAD INTERMITTENT CONTACT CONNECTION. OCCURED ON TWO SEPARATE MODULES ON TWO DIFFERENT SYSTEMS. MODULE W21018 FOR ADF FLIGHT TIMER FAILED AT PI - [SDR 2011FA0000148](https://openairdocs.org/sdr/2011FA0000148), Mar 3, 2011: PUMP. LEAKING. MECHANIC PERFORMED A LEAK CHECK AFTER INSTALLING ENGINE DRIVEN FUEL PUMP ON THE ENGINE AND FOUND FUEL LEAKING FROM SHAFT DRIVE. NO PROBABLE CAUSE OR RECOMMENDAT - [SDR 2011FA0000149](https://openairdocs.org/sdr/2011FA0000149), Mar 3, 2011: PUMP. FAILED. AFTER INSTALLING ENGINE DRIVEN FUEL PUMP ON THE ENG, MECHANIC WENT OUT TO PERFORM AN ENGINE OPS CHECK AND FOUND ENGINE WOULDN’T KEEP RUNNING UNLESS BOOST PUMP W - [SDR 2011FA0000144](https://openairdocs.org/sdr/2011FA0000144), Mar 2, 2011: PUMP. LEAKING. MECHANIC WAS PERFORMING A POST MAINTENANCE CHECK ON AIRCRAFT AND NOTICED FUEL STAINS ON THE DOG HOUSE, MECHANIC THEN PERFORMED A LEAK CHECK AND FOUND FUEL LEAKI - [SDR CA110225008](https://openairdocs.org/sdr/CA110225008), Feb 23, 2011: CIRCUIT BREAKER. FAILED. (CAN) PERFORMING AN AERO SEQUENCE, UPON INITIATING FINAL MANOUVER, SMOKE WAS DETECTED AND A SMALL AMOUNT SEEN BY PILOT, LT SEAT, COMING FROM THE CIRCUIT BREAKER - [SDR CA110225010](https://openairdocs.org/sdr/CA110225010), Feb 22, 2011: MANIFOLD. FAILED. (CAN) DURING APPROACH, LANDING GEAR FAILED TO DEPLOY. EMERGENCY SYSTEM ACTIVIATED. ACFT LANDED WFI. MAINTENANCE INSPECTION FOUND THAT THE LANDING GEAR EXTENSION - [SDR CA101021002](https://openairdocs.org/sdr/CA101021002), Oct 20, 2010: WASHER. MISSING. DURING A 200 HR INSP ON 2 OTHER ACFT, MSB 1121-109/1 WAS BEING CARRIED OUT AS REQUIRED WHEN IT WAS NOTED THAT THE WASHERS WERE MISSING. THE MFG WAS CONTACTED AN - [SDR CA101021003](https://openairdocs.org/sdr/CA101021003), Oct 20, 2010: WASHER. MISSING. DURING A 200 HR INSP ON 2 OTHER ACFT, MSB 1121-109/1 WAS BEING CARRIED OUT AS REQUIRED WHEN IT WAS NOTED THAT THE WASHERS WERE MISSING. THE MFG WAS CONTACTED AN - [SDR CA101021006](https://openairdocs.org/sdr/CA101021006), Oct 20, 2010: WASHER. MISSING. DURING A 200 HR INSP ON 2 OTHER ACFT, MSB 1121-109/1 WAS BEING CARRIED OUT AS REQUIRED WHEN IT WAS NOTED THAT THE WASHERS WERE MISSING. THE MFG WAS CONTACTED AN - [SDR CA101021007](https://openairdocs.org/sdr/CA101021007), Oct 20, 2010: WASHER. MISSING. DURING A 200 HR INSP ON 2 OTHER ACFT, MSB 1121-109/1 WAS BEING CARRIED OUT AS REQUIRED WHEN IT WAS NOTED THAT THE WASHERS WERE MISSING. THE MFG WAS CONTACTED AN - [SDR CA101021008](https://openairdocs.org/sdr/CA101021008), Oct 20, 2010: WASHER. MISSING. DURING A 200 HR INSP ON 2 OTHER ACFT, MSB 1121-109/1 WAS BEING CARRIED OUT AS REQUIRED WHEN IT WAS NOTED THAT THE WASHERS WERE MISSING. THE MFG WAS CONTACTED AN - [SDR CA101021010](https://openairdocs.org/sdr/CA101021010), Oct 20, 2010: WASHER. MISSING. DURING A 200 HR INSP ON 2 OTHER ACFT, MSB 1121-109/1 WAS BEING CARRIED OUT AS REQUIRED WHEN IT WAS NOTED THAT THE WASHERS WERE MISSING. THE MFG WAS CONTACTED AN - [SDR CA101021011](https://openairdocs.org/sdr/CA101021011), Oct 20, 2010: WASHER. MISSING. DURING A 200 HR INSP ON 2 OTHER ACFT, MSB 1121-109/1 WAS BEING CARRIED OUT AS REQUIRED WHEN IT WAS NOTED THAT THE WASHERS WERE MISSING. THE MFG WAS CONTACTED AN - [SDR CA101021012](https://openairdocs.org/sdr/CA101021012), Oct 20, 2010: WASHER. MISSING. DURING A 200 HR INSP ON 2 OTHER ACFT, MSB 1121-109/1 WAS BEING CARRIED OUT AS REQUIRED WHEN IT WAS NOTED THAT THE WASHERS WERE MISSING. THE MFG WAS CONTACTED AN - [SDR CA101021013](https://openairdocs.org/sdr/CA101021013), Oct 19, 2010: WASHER. MISSING. DURING A 200 HR INSP ON ACFT, MSB 1121-109/1 WAS BEING CARRIED OUT AS REQUIRED WHEN IT WAS NOTED THAT THE WASHERS WERE MISSING. THE MFG WAS CONTACTED AND DETERM - [SDR CA101021014](https://openairdocs.org/sdr/CA101021014), Oct 19, 2010: WASHER. MISSING. DURING A 100 HR INSP ON ACFT, MSB 1121-109/1 WAS BEING CARRIED OUT AS REQUIRED WHEN IT WAS NOTED THAT THE WASHERS WERE MISSING. THE MFG WAS CONTACTED AND DETERM All 129: https://openairdocs.org/engine/lycoming-aeio-540-d4d5/reports.md ## STCs that may be installed (OpenAirDocs) (17) Approved for this engine model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has. - [STC SE04651CH](https://openairdocs.org/stc/SE04651CH): To allow use of l00R grade aviation fuel meeting Swift Fuel, LLC specification SPEC-l00R-22. Swift Fuels LLC - [STC SE00825WI](https://openairdocs.org/stc/SE00825WI): Installation of Specialty Products Spin-on oil filter on Lycoming Engines. B & C Specialty Products Inc - [STC SE04349CH](https://openairdocs.org/stc/SE04349CH): Installation of SureFly electronic ignition. SureFly Partners Ltd - [STC SE01954SE](https://openairdocs.org/stc/SE01954SE): Installation of engine crankcase seal. Ly-Con Rebuilding Company - [STC SE02352CH](https://openairdocs.org/stc/SE02352CH): Installation of Challenger cleanable oil filter assembly. Challenger Aviation Products Inc - [STC SE00939WI](https://openairdocs.org/stc/SE00939WI): Installation of B&C Specialty Products Model BC 315-( ) Starter on Lycoming engines. B & C Specialty Products Inc - [STC SE2387CE](https://openairdocs.org/stc/SE2387CE): Installation of B & C Speciality Products lightweight (10.2 pounds) engine starter P/N BC 315-100-1(12 volt) or P/N BC 315-100-3(24 volt). B & C Specialty Products Inc. Lists AEIO-540 Series - [STC SE03309CH](https://openairdocs.org/stc/SE03309CH): Installation of Engine Preheat Kit, p/n TSP6CYL-2927-115 for 115 volt application. Hartzell Propeller Inc - [STC SE01436LA](https://openairdocs.org/stc/SE01436LA): Installation of Firewall Forward Technologies LLC modified camshaft. Centri-lube Technologies LLC - [STC SE04577CH](https://openairdocs.org/stc/SE04577CH): Install an electronic engine ignition system. Electroair Acquisition Corp - [STC SE01966WI](https://openairdocs.org/stc/SE01966WI): Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines. General Aviation Modifications Inc - [STC SE01930NY](https://openairdocs.org/stc/SE01930NY): Installation of Casper Labs 90 degree oil filter housing adapter. Casper Labs Inc - [STC SE7734SW](https://openairdocs.org/stc/SE7734SW): Modification of engine for operation with ethanol fuel. Shauck Dr Maxwell E Jr - [STC SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter. Aviation Development Corporation - [STC SE09492SC](https://openairdocs.org/stc/SE09492SC): Installation and usage of Exxon 20W50 multigrade aircraft engine oil conforming to Exxon Oil formulation WS-3013. Exxon Company USA. Lists AEIO-540 Series - [STC SE128NE](https://openairdocs.org/stc/SE128NE): Use of AMS/OIL 15W 50 synthetic piston aircraft oil in Avco engines. AMS/OIL. Lists AEIO-540 Series - [STC SA01436DE](https://openairdocs.org/stc/SA01436DE) (historical): Installation of Firewall Forward Technologies, LLC modified camshaft. Centri-Lube Technologies LLC ## PMA parts (OpenAirDocs) (over 1,000, first 50) Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this engine model on its data sheet, so check the FAA record before relying on it. Newest first. - [72-231114-2](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID157761992320260722204351.0001): TAG-Engine. Swift Fuels, LLC · PMA PQ04423CE · Modification part · Jul 17, 2026 - [ES66M19385](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID186804045820251216184409.0001): Clamp, Magneto. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 66M19385 · Nov 10, 2025 - [ES10-400567](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID182838314420251216184405.0001): Bearing, Ball. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-400567 · Nov 10, 2025 - [ES10-349249](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID172741321620251216184404.0001): Washer, Bowed. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-349249 · Nov 10, 2025 - [ES10-180046-28](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID170373951520251216184357.0001): Sleeve, Clear. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-180046-28 · Nov 10, 2025 - [ES10-349247](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID155835169920251216184407.0001): Retainer, Bearing. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-349247 · Nov 10, 2025 - [ES10-78655](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID148578074420251216184359.0001): Washer, Flat. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-78655 · Nov 10, 2025 - [ES10-35937-24](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID131353354520251216184356.0001): Screw. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-35937-24 · Nov 10, 2025 - [ES-349290-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID124195582920251216184349.0001): Magneto Assembly, S-1200 Series, 6 Cyl. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces LW-349290-1, LW-349290-1D, 75454… · Nov 10, 2025 - [ES-349310-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID117952123520251216184351.0001): Magneto Assembly, S-1200 Series, 6 Cyl. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces LW-349310-1, LW-349310-1D, 75453… · Nov 10, 2025 - [ES10-5752](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID115793636520251216184401.0001): Cable, Clip. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-5752 · Nov 10, 2025 - [ES10-349328](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID114147850320251216184403.0001): Flat Washer. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-349328 · Nov 10, 2025 - [ES10-349221](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID111222593020251216184358.0001): Stud, Hex 10-32. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-349221 · Nov 10, 2025 - [ES10-349242](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID110743662720251216184408.0001): Gear, Spur, 1200 Series, 6-Cyl. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-349242 · Nov 10, 2025 - [ES10-349243-2](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID108636864620251216184402.0001): Cam, 1200. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-349243-2 · Nov 10, 2025 - [AB-160844](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID100141747720251216184413.0001): Spring & Brush Assembly. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-160844 · Nov 10, 2025 - [OC](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID178549155320250923184433.0001): Oil Cooler Preheat Kit. Hartzell Propeller LLC · PMA PQ2040CE · Modification part · Sep 12, 2025 - [AE45BS-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID173583138520250908153031.0001): Brush Rack Assembly. Aerospace Turbine Rotables · PMA PQ3736CE · Replaces Prestolite Part Number ALU-1045BS · Aug 27, 2025 - [SL6](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID151538433320250923185921.0001): Engine Preheat Kit. Hartzell Propeller LLC · PMA PQ2040CE · Modification part · Aug 4, 2025 - [TXPL6](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID146504457020250923185923.0001): Engine Preheat Kit. Hartzell Propeller LLC · PMA PQ2040CE · Modification part · Aug 4, 2025 - [HSS](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID104096221220250923185925.0001): Engine Preheat Kit. Hartzell Propeller LLC · PMA PQ2040CE · Modification part · Aug 4, 2025 - [CFRB9089](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID126352418220250312124924.0001): Valve, Poppet Relief. PRECISION AIRMOTIVE LLC · PMA PQ0111NM · Replaces RB9089 · Dec 31, 2024 - [AA48111-2](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID120682187320240813134136.0001): Oil Filter. Aero Accessories LLC · PMA PQ1206CE · Replaces Aero AccessoriesAA48111Champion… · Jul 12, 2024 - [CF73966](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID178353257420240715164040.0001): Spacer. PRECISION AIRMOTIVE LLC · PMA PQ0111NM · Replaces 73966 · Jun 24, 2024 - [CF07A23031](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID136616521920240715164043.0001): Bracket, Fuel Manifold. PRECISION AIRMOTIVE LLC · PMA PQ0111NM · Replaces 07A23031 · Jun 24, 2024 - [CFSTD-251](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID129676558220240715164045.0001): Washer, #10 Lock, Internal Teeth. PRECISION AIRMOTIVE LLC · PMA PQ0111NM · Replaces STD-251 · Jun 24, 2024 - [CFSTD-82](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID123933662120240715164045.0001): Screw, #10-24 X 1/2, RD HD. PRECISION AIRMOTIVE LLC · PMA PQ0111NM · Replaces STD-82 · Jun 24, 2024 - [202F-1001](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID166860104420240701174401.0001): Fuel Pump. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Lear RomecRG9570K1/MLycoming… · Jun 20, 2024 - [ES3018](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID194884707820251216184204.0001): Clamp, Bearing Cap. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3018 · May 20, 2024 - [AM-3021](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID194256093820251216184144.0001): Screw Distributor Block. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3021 · May 20, 2024 - [ES5617](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID190223284620251216184226.0001): Machining, Rotating Magnet. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M5617 · May 20, 2024 - [ES3221](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID189601053820251216184228.0001): Screw. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3221 · May 20, 2024 - [AK-3975](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID181109606820251216184201.0001): Coil, Ignition. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3009, M3114, M3525, K3975, K3975 · May 20, 2024 - [AM-3015](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID180990573320251216184149.0001): Screw, Housing. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3015 · May 20, 2024 - [AM-3006](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID178460806720251216184151.0001): Bearing. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3006 · May 20, 2024 - [AM2536](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID175576430320251216184152.0001): Woodruff Key. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M2536 · May 20, 2024 - [ES3040](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID175045989620251216184205.0001): Coil Wedge. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3040 · May 20, 2024 - [ES917](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID170587168620251216184202.0001): Impulse Coupling Spring. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M917 · May 20, 2024 - [AK-3984](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID168254730520251216184200.0001): Capacitor. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3183, K3984 · May 20, 2024 - [AM-2556](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID164604517920251216184155.0001): Cotter Pin. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M2556 · May 20, 2024 - [ES3637K](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID163564757720251216184213.0001): Contact Point Secondary. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3637 · May 20, 2024 - [ES3084](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID152458666320251216184211.0001): Air Vent With Hood. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3084 · May 20, 2024 - [AM-3217](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID152412216720251216184157.0001): Wave Spring Washer. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M-3217 · May 20, 2024 - [AM-3485](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID151878274520251216184156.0001): Bearing Cap, Assembly. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3485 · May 20, 2024 - [AM-3215](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID151335825620251216184148.0001): Brush Assy, Distributor. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3215 · May 20, 2024 - [ES3823](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID146282172620251216184219.0001): Dist. Block & Gear Assy.. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces K3823 · May 20, 2024 - [ES3331](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID142668191320251216184207.0001): Oil Seal. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3331 · May 20, 2024 - [ES3828](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID141865244620251216184221.0001): Rotor Gear. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces K3828 · May 20, 2024 - [AM-3020](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID134367835920251216184146.0001): Screw. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3020 · May 20, 2024 - [ES1077](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID132381862220251216184212.0001): Air Vent. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M1077 · May 20, 2024 All of them: https://openairdocs.org/engine/lycoming-aeio-540-d4d5/pma.md --- 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.