# Lycoming IO-720-A1B - Type: Engine model (FAA registry) - Registry code: 41949 - Manufacturer (registry): LYCOMING - Model: IO-720-A1B - Engine type: Reciprocating - Power: 400 hp - Data sheet: [TCDS 1E15](https://openairdocs.org/tcds/1E15) (OpenAirDocs) - Holder: Textron Lycoming Subsidiary of Textron Inc. - Installed in: 8 registered aircraft - Page: https://openairdocs.org/engine/lycoming-io-720-a1b 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 2022-16-03](https://openairdocs.org/ad/2022-16-03): Engine (RECIPROCATING) · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-F and 236 more. Effective Aug 15, 2022 - [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 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 2011-18-09](https://openairdocs.org/ad/2011-18-09): Crankshaft failure · Textron Lycoming, AVCO IO-720-A1B. Effective Sep 29, 2011 - [AD 2010-07-08](https://openairdocs.org/ad/2010-07-08): Turbochargers · Kelly Aerospace Energy Systems HIO-360-E1AD, HIO-360-E1BD, HIO-360-F1AD and 137 more. Effective Apr 19, 2010 - [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 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 98-17-11](https://openairdocs.org/ad/98-17-11): Crankshafts · Continental Motors A-65-3, A-65-8, A75-8 and 90 more. Effective Oct 19, 1998 - [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 95-07-01](https://openairdocs.org/ad/95-07-01): Connecting Rod Bolt · Lycoming Engines AEIO-360-A1E, AEIO-360-B1G6, AEIO-360-H1A and 177 more. Effective Apr 12, 1995 - [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 - [AD 79-04-05](https://openairdocs.org/ad/79-04-05): Regulator Diaphragm Stem Assembly · Lycoming Engines AEIO-320-D1B, AEIO-320-E1A, AEIO-320-E1B and 215 more. Effective Sep 26, 1979 - [AD 78-23-10](https://openairdocs.org/ad/78-23-10): Center Body Bellows Seal Assembly · Lycoming Engines AEIO-320-D1B, AEIO-320-E1A, AEIO-320-E1B and 218 more. Effective Nov 7, 1978 - [AD 73-23-01](https://openairdocs.org/ad/73-23-01): Piston Pin Assembly · Lycoming Engines AIO-360-A1A, AIO-360-A1B, AIO-360-A2A and 215 more. Effective Jan 13, 1977 - [AD 75-09-15](https://openairdocs.org/ad/75-09-15): Fuel Starvation To The Engine · Lycoming Engines AIO-320-A1A, AIO-320-A1B, AIO-320-A2A and 130 more. Effective Apr 30, 1975 - [AD 73-10-02](https://openairdocs.org/ad/73-10-02): Bendix Fuel Injectors · Bendix Fuel Injectors, AIO-320-A1A, AIO-320-A1B and 88 more. Effective May 16, 1973 - [AD 66-06-03](https://openairdocs.org/ad/66-06-03): Connecting Rod Assemblies · Lycoming Engines GO-435-C2 (O-435-17), GO-435-C2A, GO-435-C2A2 and 317 more. Effective Jan 16, 1969 Historical (superseded or no longer in force): - [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 2008-14-07](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 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 98-18-12](https://openairdocs.org/ad/98-18-12) (historical): Fuel Pump · Textron Lycoming, AVCO AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 249 more. Effective Sep 28, 1998 ## Information bulletins (advisory) (1) - [SAIB NE-08-32R1](https://openairdocs.org/saib/NE-08-32R1): Propeller Governor Idler Gear Shaft Set Screw. Issued May 13, 2016 ## Registered aircraft (8) - [N41HW](https://openairdocs.org/aircraft/N41HW): [Fresh Air Aviation Inc](https://openairdocs.org/faa-owner/FRESH%20AIR%20AVIATION%20INC), [Charlevoix, MI](https://openairdocs.org/faa-place/MI/Charlevoix), S/N LF73 - [N62AX](https://openairdocs.org/aircraft/N62AX): [Arrow Air Services LLC](https://openairdocs.org/faa-owner/ARROW%20AIR%20SERVICES%20LLC), [Greenleaf, ID](https://openairdocs.org/faa-place/ID/Greenleaf), S/N 99-7224 - [N702JD](https://openairdocs.org/aircraft/N702JD): [Crossbow Aviation LLC](https://openairdocs.org/faa-owner/CROSSBOW%20AVIATION%20LLC), [Reno, NV](https://openairdocs.org/faa-place/NV/Reno), built 1965, S/N 26-93 - [N76400](https://openairdocs.org/aircraft/N76400): [Horning Air LLC](https://openairdocs.org/faa-owner/HORNING%20AIR%20LLC), [Cresbard, SD](https://openairdocs.org/faa-place/SD/Cresbard), built 1976, S/N 36-7660096 - [N800EQ](https://openairdocs.org/aircraft/N800EQ): [Mccauley Kerry D](https://openairdocs.org/faa-owner/MCCAULEY%20KERRY%20D), [Menomonie, WI](https://openairdocs.org/faa-place/WI/Menomonie), built 1960, S/N LF-24 - [N846LA](https://openairdocs.org/aircraft/N846LA): [Alfieri Louis](https://openairdocs.org/faa-owner/ALFIERI%20LOUIS), [Middleton, NH](https://openairdocs.org/faa-place/NH/Middleton), S/N WG-600-2 - [N8483P](https://openairdocs.org/aircraft/N8483P): [High Wing Aviation LLC](https://openairdocs.org/faa-owner/HIGH%20WING%20AVIATION%20LLC), [Sardis, MS](https://openairdocs.org/faa-place/MS/Sardis), built 1964, S/N 26-62 - [N96038](https://openairdocs.org/aircraft/N96038): [Ellison Orlo T](https://openairdocs.org/faa-owner/ELLISON%20ORLO%20T), [Broomfield, CO](https://openairdocs.org/faa-place/CO/Broomfield), built 1963, S/N 53-6233 ## NTSB investigations (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB CEN12CA542](https://openairdocs.org/ntsb/CEN12CA542), Aug 8, 2012: Piper PA-36-285 (N204AB), Harvey, ND, substantial damage. Probable cause: The pilot’s decision to take off with the airplane over its maximum gross weight on a turf runway and with a tailwind, and his subsequent failure to maintain airplane control. ## FAA accident and incident reports (2) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Incident 20250304005269I](https://openairdocs.org/incident/20250304005269I), Mar 4, 2025: Piper PA-24-400 (N702JD), Port Clinton, OH, Minor damage. The pilot stated that the flight was the second flight of the day. Normal start up and run up for runway 18. Takeoff power was normal, the only deviations were… - [Accident 20120808018029A](https://openairdocs.org/incident/20120808018029A), Aug 8, 2012: Piper PA-36-285 (N204AB), Harvey, ND, Substantial damage. Pilot reported that nearing rotation speed, aircraft lifted, then settled back down on runway and did not appear to want to fly. Aircraft lifted off runway and… ## Service difficulty reports (50) As reported by operators and repair stations, by the model named in the report. - [SDR 2024F00317](https://openairdocs.org/sdr/2024F00317), Dec 10, 2024: DISPLAY. FAILED. GARMIN 600 PFD FAILED IN CRUISE FLIGHT - [SDR BEMA202111170001](https://openairdocs.org/sdr/BEMA202111170001), Nov 16, 2021: HEATER. ODOR. PILOT REPORTED SEEING A FLASH OF LIGHT AND A BURNING SMELL COMING FROM BELOW THE INTERMENT PANEL ON THE R/H SIDE BY THE RUDDER PEDDLES AREA. THE PILOT REPORTED - [SDR BEMA20201028001](https://openairdocs.org/sdr/BEMA20201028001), Oct 23, 2020: CONNECTING ROD. BROKEN. PILOT NOTICED ONSET OF SIGNIFICANT VIBRATION, FOLLOWED BY OIL PRESSURE LOSS. SHUT DOWN LT ENGINE ON FINAL AT KMSP. PILOT NOTIFIED MSP TOWER OF ENGINE FAILURE. O - [SDR BEMA202009230001](https://openairdocs.org/sdr/BEMA202009230001), Aug 24, 2020: ALTERNATOR. BROKEN. RT ENGINE ALTERNATOR POWER SUPPLY STUD BROKE OFF RECTIFIER PLATE, AT THE PLATES 90 DEGREE BEND NEXT TO MADE IN CHINA STICKER. LOOKED LIKE CRACK STARTED FROM STR - [SDR BEMA20200618001](https://openairdocs.org/sdr/BEMA20200618001), Jun 10, 2020: DME. FAILED. PILOT REPORTED SMOKE IN COCKPIT AND MADE AN UNSCHEDULED LANDING SAFELY AT ALTERNATE AIRPORT. UPON INVESTIGATION IT WAS FOUND THAT THE DME HAD INTERNALLY FAILED - [SDR BEMA2019072900001](https://openairdocs.org/sdr/BEMA2019072900001), Jul 23, 2019: INTAKE VALVE. BROKEN. THE #1 CYLINDER INDUCTION VALVE FAILED IN FLIGHT. THE PROBLEM WAS NOT DETECTED UNTIL THE PILOT DID HIE POST FLIGHT WALK AROUND. THE VALVE BROKE IN HALF AT THE N - [SDR 2014FA0000328](https://openairdocs.org/sdr/2014FA0000328), May 13, 2014: ADAPTER. CRACKED. OIL FILTER ADAPTER CRACKED ACROSS THE UPPER LT CORNER DURING FLIGHT, CAUSING LARGE LOSS OF OIL IN APPROX 10 MINUTES OF OPERATION. PART HAS NOT BEEN DISTURBED ON - [SDR 2014FA0000082](https://openairdocs.org/sdr/2014FA0000082), Aug 12, 2012: BUSHING. LOOSE. CENTER BUSHING OF DISTRIBUTOR BLOCK FOUND LOOSE IN THE PLASTIC OF THE DISTRIBUTOR BLOCK, ROTOR ARM WAS CONTACTING DISTRIBUTOR BLOCK BECAUSE OF THE BUSHING BEING - [SDR 2012FA0000384](https://openairdocs.org/sdr/2012FA0000384), May 27, 2012: GOVERNOR. FAULTED. ACFT WAS INSPECTED, ENGINE GROUND WAS CARRIED OUT BOTH ENGINE PERFORMANCE WAS GOOD. AT THE TIME OF FERRYING ACFT UNDER THE FERRY FLIGHT PERMIT WHEN ACFT FLEW AN - [SDR CA6R20110408003](https://openairdocs.org/sdr/CA6R20110408003), May 27, 2012: GOVERNOR. MALFUNCTIONED. ACFT INSPECTED, ENGINE GROUND RUN CARRIED OUT, BOTH ENGINE PERFORMANCES WERE GOOD. ACFT TEST FLIGHT WAS CONDUCTED AND WAS GOOD. AT THE TIME OF FERRING THE ACFT, - [SDR 2008FA0000468](https://openairdocs.org/sdr/2008FA0000468), Jul 1, 2008: HINGE. CRACKED. (2) OF THE HINGE LINKS HAD CRACKED OFF ON ONE END. UPON DISASSEMBLY IT WAS DETERMINED THAT A CRACK HAD FORMED LENGTHWISE BETWEEN THE FASTENERS AND THE HINGE LIN - [SDR 2006FA0001212](https://openairdocs.org/sdr/2006FA0001212), Nov 22, 2006: BELLCRANK. CRACKED. A CRACK WAS FOUND ON THE RT BELLCRANK SUPPORT ASSY. DURING A MANDITORY 5 YEAR INSPECTION IAW MSB 2231 REV 1. (K) - [SDR ZES2006F00001](https://openairdocs.org/sdr/ZES2006F00001), Oct 11, 2006: AUDIO PANEL. BURNED. A SMELL OF SMOKE WAS DETECTED IN THE COCKPIT AND CABIN. PILOTS DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. (K) - [SDR 2006F00012](https://openairdocs.org/sdr/2006F00012), Feb 14, 2006: ACTUATOR. FAILED. PILOT SELECTED GEAR DOWN FOR LANDING AND HAD NO NOSE INDICATION. HE PERFORMED A LOW LEVEL PASS AND GROUND PERSONNEL DETERMINED THAT THE NOSE GEAR WAS NOT IN THE - [SDR AU510001675](https://openairdocs.org/sdr/AU510001675), Dec 12, 2005: BOLT. SHEARED. (AUS) NR 2 CYLINDER CONNECTING ROD BIG END BOLT FAILED WITH OTHER BIG END BOLT BENT. NR 2 CYLINDER SEPARATED FROM CRANKCASE. (OTHER CAUSE: MATERIAL - HIGH HOURS - [SDR AU510001770](https://openairdocs.org/sdr/AU510001770), Dec 12, 2005: GASKET. FAILED. RT ENGINE OIL COOLER LOWER FITTING GASKET FAILED. LOSS OF ENGINE OIL. - [SDR CVU2005F00003](https://openairdocs.org/sdr/CVU2005F00003), Aug 18, 2005: SHAFT. SHEARED. PUMP FAILED UNDER NORMAL OPERATING CONDITIONS (VFR, DAY). - [SDR CVU2005F00001](https://openairdocs.org/sdr/CVU2005F00001), Jul 15, 2005: CAMSHAFT. WORN. SMALL METAL FLAKES KEPT RE-APPEARING IN THE OIL SCREENS. FOUND WORN CAM NR 5 AND NR 6 CYLINDER INTAKE VALVES. ENGINES REMOVED FOR REPAIR. USE MFG ENGINE OIL ADD - [SDR CVU2005F00002](https://openairdocs.org/sdr/CVU2005F00002), Jul 15, 2005: LIFTER. WORN. SMALL METAL FLAKES KEPT RE-APPEARING IN THE OIL SCREENS. FOUND WORN CAM NR 5 AND NR 6 CYLINDER INTAKE VALVES. ENGINES REMOVED FOR REPAIR. USE MFG ENGINE OIL ADD - [SDR CVU2005F00000](https://openairdocs.org/sdr/CVU2005F00000), Nov 23, 2004: PUMP. FAILED. PUMP FAILED UNDER NORMAL OPERATING CONDITIONS. (VFR, DAY) (K) - [SDR CVU2004F00000](https://openairdocs.org/sdr/CVU2004F00000), Sep 23, 2004: PUMP. FAILED. VACUUM PUMP FAILED UNDER NORMAL OPERATING CONDITIONS. (VFR DAY) - [SDR BEM2004F00000](https://openairdocs.org/sdr/BEM2004F00000), Jul 8, 2004: BEARING. FAILED. NR 1 ALTERNATOR WENT INOPERATIVE IN FLIGHT INVESTIGATION FOUND REAR ROTOR BEARING OF ALTERNATOR HAD NO GREASE AND FAILED. - [SDR KZ52004F00000](https://openairdocs.org/sdr/KZ52004F00000), May 6, 2004: VALVE. INOPERATIVE. PILOT REPORTED HIGH OIL TEMP 210 DEGREES-220 DEGREES F., REMOVED VALVE AND TESTED SIDE BY SIDE WITH NEW VALVE, OLD VALVE DID NOT CLOSE AT THE SAME REATE AS NEW - [SDR 2004FA0000413](https://openairdocs.org/sdr/2004FA0000413), May 6, 2004: VALVE. INOPERATIVE. PILOT REPORTED HIGH OIL TEMPERATURE 220-225 DEGREES, REMOVED VALVE AND TESTED SIDE BY SIDE WITH NEW VALVE, OLD VALVE DID NOT CLOSE AT THE SAME RATE AS NEW VALVE - [SDR AUS20040146](https://openairdocs.org/sdr/AUS20040146), Mar 1, 2004: BOLT. FAILED. (AUS) RT MAIN LANDING GEAR TOP TORQUE LINK BOLT FAILED. - [SDR AUS20040063](https://openairdocs.org/sdr/AUS20040063), Jan 28, 2004: EXHAUST VALVE. STICKING. (AUS) NR 2 CYLINDER REAR PUSHROD COVER BENT AND LEAKING OIL. SUSPECT CAUSED BY STICKING EXHAUST VALVE. - [SDR CVU2003F00000](https://openairdocs.org/sdr/CVU2003F00000), Sep 20, 2003: PUMP. FAILED. PUMP FAILED UNDER NORMAL OPERATING CONDITIONS (VFR DAY). - [SDR AUS20030514](https://openairdocs.org/sdr/AUS20030514), May 15, 2003: SPACER. FRACTURED. (AUS) WING TO FUSELAGE RT SPACER FRACTURED. - [SDR AUS20030524](https://openairdocs.org/sdr/AUS20030524), Apr 29, 2003: BEARING. FAULTY. (AUS) REAR MAIN BEARING SURFACE SEPARATED FROM BEARING SHELL. - [SDR 2003FA0000018](https://openairdocs.org/sdr/2003FA0000018), Dec 19, 2002: MAIN BEARING. FAILED. AFTER TEST CELL RUN, ENGINE OIL WAS DRAINED AND THE SUCTION SCREEN AND FILTER WAS CHECKED. A ABNORMAL AMOUNT OF ALUMINUM WAS FOUND. UPON DISASSEMBLY, IT WAS FOU - [SDR AUS20021409](https://openairdocs.org/sdr/AUS20021409), Dec 2, 2002: FITTING. CRACKED. (AUS) LT WING ATTACHMENT FITTING CRACKED. - [SDR KZ52002F00002](https://openairdocs.org/sdr/KZ52002F00002), Aug 28, 2002: SERVO. FAILED. PILOT REPORTED RT ENGINE TO BE LOW ON POWER, FOUND ENGINE TO BE RUNNING VERY RICH, WHICH CAUSED PLUGS TO FOUL, INSTALLED OVERHAULED FUEL SERVO AND CLEANED PLUGS - [SDR KZ52002F00001](https://openairdocs.org/sdr/KZ52002F00001), Aug 15, 2002: GEAR. BROKEN. A NEW STARTER NEEDS TO BE DESIGNED. ENGINE DID NOT KICK BACK DURING START. - [SDR AUS20021051](https://openairdocs.org/sdr/AUS20021051), Jul 8, 2002: CONNECTING ROD. FAILED. (AUS) DURING AGRICULTURE OPERATIONS (SPREADING SUPER) THE PILOT ENCOUNTERED EXCESSIVE ENGINE VIBRATION AND A POSSIBLE OVERSPEED (WAS UNABLE TO READ GAUGES). ENG - [SDR AUS20020418](https://openairdocs.org/sdr/AUS20020418), Apr 22, 2002: BOLT. BROKEN. (AUS) MAIN LANDING GEAR TORQUE LINK BOLT FAILED. LOWER HALF OF OLEO STRUT, TORQUE LINKS, AXLE AND WHEEL ASSEMBLY POPPED OUT AFTER TAKEOFF. - [SDR AUS20020327](https://openairdocs.org/sdr/AUS20020327), Apr 5, 2002: SEAL. LEAKING. (AUS) ENGINE FUEL PUMP REAR SEAL LEAKING. FOUND DURING INSPECTION IAW AD/FSM/25. - [SDR AUS20020102](https://openairdocs.org/sdr/AUS20020102), Feb 3, 2002: PIN. BROKEN. (AUS) PROPELLER BLADE ACTUATING PIN BROKEN. - [SDR AUS20020103](https://openairdocs.org/sdr/AUS20020103), Feb 2, 2002: PIN. BROKEN. (AUS) PROPELLER BLADE PITCH ACTUATING PIN BROKEN. - [SDR AUS20010773](https://openairdocs.org/sdr/AUS20010773), Jul 23, 2001: GASKET. FAULTY. (AUS) FLOW DIVIDER GASKET FAULTY. NEW ITEM FROM MANUFACTURER. - [SDR 2001FA0000142](https://openairdocs.org/sdr/2001FA0000142), May 12, 2001: CYLINDER. BROKEN. BARREL TO HEAD SEPERATION DURING FLIGHT. - [SDR AUS20010528](https://openairdocs.org/sdr/AUS20010528), Apr 18, 2001: PUSHROD. DISTORTED. (AUS) NR 7 CYLINDER EXHAUST VALVE PUSHROD BENT AND PUSHROD SHROUDDAMAGED CAUSING OIL LEAK. INVESTIGATION FOUND THE VALVE STEM CAP SEPARATED AND THE PISTON SUFFE - [SDR AUS20010527](https://openairdocs.org/sdr/AUS20010527), Apr 12, 2001: VALVE. WORN. (AUS) NO2 CYLINDER INLET VALVE DAMAGED IN THE COLLETT RECESS AREA.VALVE STEM CAP SEPARATED AND ONLY ONE COLLETT HALF WAS RETAININGTHE VALVE SPRING. METAL PARTIC - [SDR 20010206CW006](https://openairdocs.org/sdr/20010206CW006), Jan 11, 2001: EXHAUST VALVE. BROKEN. EXHAUST VALVE BROKEN IN HALF. - [SDR AU001059](https://openairdocs.org/sdr/AU001059), Sep 30, 2000: LINE. BROKEN. (AUS) NR 2 AND NR 4 CYLINDER FUEL INJECTOR LINES PN LW-12098-0-170 AND PN LW-12098-0-240 BROKEN AT OR NEAR NIPPLE ON NOZZLE END OF LINE. (X) - [SDR 20000720SH034](https://openairdocs.org/sdr/20000720SH034), Jun 26, 2000: SPRING. CRACKED. EXHAUST VALVE SPRING RETAINING CAP BROKE IN HALF AND BURNED EXHAUST VALVE. (X) - [SDR 98ZZZX2598](https://openairdocs.org/sdr/98ZZZX2598), Jun 11, 1998: STUD. FAILED. CYLINDER HOLD DOWN STUD BROKE UNDER NUT. SUSPECT DEFECTIVE STUD. - [SDR AU970669](https://openairdocs.org/sdr/AU970669), Jun 16, 1997: CRANKCASE. WORN. (AUS) CRANKCASE FRETTING IN AREA OF CRANKCASE THROUGH BOLTS - [SDR AU960896](https://openairdocs.org/sdr/AU960896), Jun 27, 1996: CLAMP. FAULTY. (AUS) PROPELLER CLAMP FAULTY - CLAMP APPEARS TO HAVE FORGING FLAW - SUSPECT MANUFACTURING FAULT - [SDR AU960021](https://openairdocs.org/sdr/AU960021), Jan 9, 1996: NOZZLE. FAILED. (AUS) ENGINE OIL SYSTEM CONTAMINATED BY METAL - NO3 CYLINDER OIL SQUIRT NOZZLE MISSING - THE NOZZLE BALL WAS FOUND IN THE CRANKCASE ANDTHE REMAINDER OF THE NOZZ - [SDR 95ZZZX3462](https://openairdocs.org/sdr/95ZZZX3462), Jun 15, 1995: CRANKCASE. CRACKED. WHILE ASSISTING THE OWNER/OPERATOR WITH A PREVENTIVE MAINTENANCE OPERATION, A CRACK WAS DISCOVERED ON THE FRONT SIDE OF THE NR 1 CYLINDER MOUNT PAD AREA. THE CR ## STCs that may be installed (OpenAirDocs) (28) 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 SE00825WI](https://openairdocs.org/stc/SE00825WI): Installation of Specialty Products Spin-on oil filter on Lycoming Engines. B & C Specialty Products Inc - [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 SE51WE](https://openairdocs.org/stc/SE51WE): Installation of two (2) Roto-Master (Rajay) P/N 600573-00 (RJ0326, RJ0326-1) or 600576-00 (RJ0326-2) (or any combination thereof) Turbochargers. TALCO Aviation - [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 SE8628SW](https://openairdocs.org/stc/SE8628SW): Installation of oil nozzles for lubrication of cam and filters. Cygnet Aerospace Corp - [STC SE09445SC](https://openairdocs.org/stc/SE09445SC): Installation of fuel injector nozzles. General Aviation Modifications Inc. Lists IO-720 Series - [STC SE4408SW](https://openairdocs.org/stc/SE4408SW): Miscellaneous engine cylinder replacement parts. Continental Motors, Inc. Lists IO-720 Series - [STC SE7506SW](https://openairdocs.org/stc/SE7506SW): Installation of any or all parts listed on Airmotive Engineering Drawing List No. 852-1, Rev. 1, dated 10/4/88, or later FFA approved revision. Continental Motors, Inc. Lists IO-720 Series - [STC SE7670SW](https://openairdocs.org/stc/SE7670SW): Installation of parts listed on Drawing List No. 8810-3, Rev 6. Continental Motors, Inc. Lists IO-720 Series - [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc. Lists IO-720 Series - [STC SE00226NY](https://openairdocs.org/stc/SE00226NY): Replacement of Lycoming starter with SKY-TEC 24-volt starter Models 149-24HT and 122-24HT. Approval limited to 24-volt DC source available to the starter. Hartzell Engine Technologies, LLC - [STC SE2902NM](https://openairdocs.org/stc/SE2902NM): Lycoming valve cover gasket. Real Gaskets Tennessee - [STC SE7582SW](https://openairdocs.org/stc/SE7582SW): Grinding of high compression NITRIDED Cylinders to .010 oversize, as an alternative to chrome plating or rebarreling, and the installation of SL10207 P10 Piston, SL74241 P10 Top and second compression ring, and SL 73857 P10 oil control ring. Superior Air Parts, Inc - [STC SE02436AT](https://openairdocs.org/stc/SE02436AT): Installation of 200F series fuel pump assembly. Kelly Aerospace Energy Systems LLC - [STC SE02555AT](https://openairdocs.org/stc/SE02555AT): Consolidated Fuel Systems 201F series fuel pump assembly on various Textron Lycoming engine models. Kelly Aerospace Energy Systems LLC - [STC SE707GL](https://openairdocs.org/stc/SE707GL): Installation of a fuel flow transducer. Shadin Avionics - [STC SE01930NY](https://openairdocs.org/stc/SE01930NY): Installation of Casper Labs 90 degree oil filter housing adapter. Casper Labs Inc - [STC SE1779NM](https://openairdocs.org/stc/SE1779NM): Installation of Precise Flight, Inc. Standby Vacuum System SVS III. Precise Flight Inc - [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 IO-720 Series - [STC SE00350SE](https://openairdocs.org/stc/SE00350SE): Installation of sump mounted chip detector. Aviation Development Corporation - [STC SE00299WI](https://openairdocs.org/stc/SE00299WI): Installation of B & C Specialty Products lightweight (10.2 pounds) engine starter P/N BC315-100-1(12 volts) or P/N BC 315-100-3(24 volts). Bainbridge William C III - [STC SE8023SW](https://openairdocs.org/stc/SE8023SW): Installation and usage of AEROSHELL. Shell Development Co. Lists IO-720 Series - [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil. Mobil Research & Development Corp. Lists IO-720 Series - [STC SE5879SW](https://openairdocs.org/stc/SE5879SW): Use of Phillips X/C II 20W-50 and25W-60 oil (OSS 55875) in all Avco reciprocating aircraft engines from 65 to 450 BHP. Phillips Petroleum Co. Lists IO-720 Series - [STC SE5924SW](https://openairdocs.org/stc/SE5924SW): Installation of stainless steel replacement exhaust studs on AVCO engines. Perrigo & Steele Aircraft Engr Company. Lists IO-720 Series - [STC SE128NE](https://openairdocs.org/stc/SE128NE): Use of AMS/OIL 15W 50 synthetic piston aircraft oil in Avco engines. AMS/OIL. Lists IO-720 Series - [STC SE63WE](https://openairdocs.org/stc/SE63WE): Installation of starter ring gear support assembly. Adler Neil J --- 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.