Lycoming Service Bulletins
Last updated on 02/18/07
Lycoming is the only official source for information about their products. Information here is only to be use for entertainment purposes.
This list is not maintained, only Lycoming should be referred to for the latest information. List is applicable to O, IO, AEIO, AIO, HIO, HO, LO, TO, TIO-360 SERIES
| SB | Title | AD | Remark |
| SB113 | Dry Sump Test Stand Installation of Lycoming Opposed Series Engines | ||
| SB183A | Magneto Timing Discrepancies | ||
| SB201E | Crankshaft Flanges, Inspection and Straightening of Bent | ||
| SB212B | Necked Studs, Replacing Straight Thru-Studs With | ||
| SB222D | Crankshaft Renitriding Recommendations | ||
| SB225B | Rocker Thrust Washers, Valve, Replacement of | ||
| SB235A | Magnetos, Procedure for Inspection of Type SN-20 and SN-21 (Lightweight) | ||
| SB238 | Hydraulic Tappet Plunger Assy., Magnetized Condition | ||
| SB240T | Overhaul, Normal, Parts Replacement, and During Repair or Normal Maintenance | ||
| SB271A | Cylinder Painting | ||
| SB272A | Crankshaft Center Main Journal, Retorquing of Thru-Studs to Assure Positive Clearance | ||
| SB273A | Crankcase Center Main Bearing Support, Modification to Incorporate Body Fit Thru-Studs | ||
| SB297A | Carburetor, Marvel-Schebler MA-4-5, One Piece and Main Venturi | 63-22-03 | |
| SB301B | Maintenance Procedures and Service Limitations for Valves | ||
| SB302A | Connecting Rod Assemblies, P/N’s 74308 & 74503, Replacement in IO-360-A1A Engines | 66-06-03 | |
| SB305B | Bendix Fuel Injector Bulletin No. 18, Rev. 4, “Replacement of Bendix Fuel Diaphragm Assy. | 67-22-06 | |
| SB318B | Lubricating Oil Limitations | ||
| SB326A | Bearing Dowel Replacement | 71-05-02 | |
| SB327C | Bearing, Inspection of Center Main | 71-05-02 | |
| SB330B | Carburetor Throttle Arm Screw, Retighten and Lockwire | 72-06-05 | |
| SB340 | Bendix Magneto Bulletin No. 530A, “Securing Coil Clamp” | ||
| SB341 | Bendix Magneto Bulletin No. 549, “Locating Shoulder for Carbon Brush Spring” | ||
| SB342E | Clamp Inspection and Installation, Support, and Fuel Line | 2002-26-01 | required for IO-360-B1E |
| SB343B | Bendix Magneto Bulletin No. 551A, “New Distributor Block Lubricant” | ||
| SB347 | AiResearch Bulletin No. 571-1, “Turbine Housing Inspection & Replacement” | ||
| SB348A | Cylinder Head, Clearance Between Valve Rocker and | ||
| SB349 | Engine Starting, Relocating Fuel Drain Valve to Improve | ||
| SB352 | Carburetor, Marvel-Schebler/Tillotson Bulletin No. 1-71, “Securing Cam Lever” | ||
| SB357 | Immersion, Engine Inspection in Event of | ||
| SB363 | Bolts, Connecting Rod, Part Number Listing PC-206: IO-360 Series Engines | ||
| SB364A | Grommet, Magneto Replacement | 73-15-04 | |
| SB365 | Bendix Magneto Conversion to Incorporate Flexible Drive | ||
| SB366 | Carburetor Throttle Body Screw Inspection | ||
| SB369J | Engine Inspection after Overspeed | ||
| SB370 | Oil Filter Attaching Stud Replacement | ||
| SB373, 373-1 | Bendix Magneto Bulletin No. 566, “S-1200 Distributor Block & Gear Change” | ||
| SB374 | Fuel Pump Inlet Inspection | ||
| SB376 | Bendix Magneto Bulletin No. 556B, “Magneto Drive Shaft Bushing Change” | 74-26-09 | |
| SB380A | IO-360-C Timing Change | ||
| SB382 | Bendix Fuel Injector Bulletin No. RS-43, “Inspection & Modification of Flow Dividers” | 75-09-15 | required for IO-360-B1E |
| SB388C | Exhaust Valve and Guide, Procedure to Determine Condition | ||
| SB398 | Fuel, Recommendations Regarding Use of Incorrect | ||
| SB399 | Lubricating Oil, Safe Quantity | ||
| SB400 | Thrust Buttons, Teflon, Installation of | ||
| SB401 | Aircraft Struck by Lightning, Recommendations | ||
| SB402 | Valve Tappet Clearance | ||
| SB403 | Aerobatic Engine Lubricating Requirements | ||
| SB405 | Spacer, Turbo Strut | ||
| SB406A | Fuel Pump Inspection, Titan | ||
| SB408 | Turbocharger, Rajay Industries Service Letter No. 21A, “Inspection of Turbine (Exhaust) Housing” | ||
| SB409 | Carburetor Replacement | 77-13-16 | |
| SB410 | Bendix Magneto Bulletin No. 587, “Inspection D2000 Carburetor & Lead Crimp Terminals” | 78-18-04 | |
| SB411B | Adapter Kit for Magneto Isolation Drive | ||
| SB414 | Magneto, Bendix Bulletin No. 589, “Rear Bearing Lubrication – D2000/D2200 Mags.” | 78-18-04 | |
| SB415A | Bendix Magneto Bulletin No. 590A, “Rotating Magnet to Housing Clearance, D2000/D2200 Mags.” | 78-18-04 | |
| SB416A | Bendix Magneto Bulletin No. 584B, “Coil Retaining Devices, D2000/D2200 Mags” | 78-18-04 | |
| SB418 | Control Cable Rod End Replacement Waste Gate | ||
| SB419 | Exhaust Valve Replacement – TO-360 | ||
| SB420 | Mount Assy., Turbocharger | ||
| SB425C | Magneto, Teledyne Continental Motors Mandatory Bulletin No. MSB645, “Inspection of Riveted Impulse Coupling and Stop Pins” | 2005-12-06 | |
| SB426 | Drain Flange Replacement, Turbocharger Oil | 80-02-13 | |
| SB427A | Bendix Magneto Bulletin No. 600, “10-353110 Bearing in D2000/D2200 Mags.” | ||
| SB428, 428-1 | Bendix Fuel Injector Bulletin No. RS-52, “Mod. of RSA-5AB1, RSA-5AD1 & RSA-10AD1” | 78-23-10 | |
| SB429 | Bendix Fuel Injector Bulletin No. RS-53, “Modification of RSA-7AA1” | 78-23-10 | |
| SB433A | Bendix Fuel Injector Bulletin No. RS-57, Rev. 1, “Inspection of Fuel Diaphragm Assy. P/N 2529471” | 79-04-05 | |
| SB434 | Carburetor, Marvel-Schebler Bulletin No. A1-79, “Improved Sealing of Economizer Channel HA-6 Carburetors” | 79-15-02 | |
| SB438A | Bendix Magneto Bulletin No. 605A, “Housing Distortion & Coil Retention” | 80-17-14 | |
| SB439A | Connecting Rods, Inspection for Fretting and/or Galling, Repair of Fretting | ||
| SB442, 442S-1 | Fuel Injector, Bendix Bulletin No. RS-68, “Integrity Inspection of Regulator Stem Nut” | 79-21-08 79-26-03 | |
| SB443 | Bendix Fuel Injector Bulletin No. RS-69, “Integrity Inspection of Regulator Stem Nut” | 79-21-08 | |
| SB446D | Additive, Oil, Use of Textron Lycoming LW-16702 | 80-04-03 | |
| SB447B | Exhaust Valve Spring Seats, Inspection | 80-14-07 | |
| SB449 | Magneto, Slick Electro Bulletin No. 1-80, “Impulse Coupling Hubs” | 80-06-05 | |
| SB451 | Gage, Oil Level, Rework or Replacement | ||
| SB457A | Magneto, Slick Electro Bulletin No. 1-81, “Magneto Malfunction Due to Cracking of Coil Potting Compound” | ||
| SB458 | Magneto, Bendix Bulletin No. 613, “Inspection and/or Replacement of Green Distributor Blocks” | ||
| SB460 | Bendix Magneto Bulletin No. 619, “Inspection or Replacement of Distributor Gears” | ||
| SB461 | Magneto, Bendix Bulletin No. 617, “Replacement or Inspection of Distributor Blocks” | ||
| SB464A | Bendix Magneto Bulletin No. 623A, “Inspection of Impulse Coupling Cam Assys.” | 82-20-01 | |
| SB465C | Aerobatic Engine Crankshaft Flange Inspection | 84-13-05 | |
| SB466 | Adapter, Oil Filter Base, Inspection | ||
| SB468C | Gear Support Assemblies, Inspection of Single Belt Driven Starter Ring | ||
| SB472 | Crankcases, Disassembly of Wide Cylinder Flange | ||
| SB473 | Transition Assembly, P/N LW-16863 | ||
| SB475C | Gear Assembly Procedures and Modification, Crankshaft | 2004-10-14 | required for IO-360-B1E |
| SB477A, 477-1 | Inspection and Rework of P/N LW-18790 Rocker Arm Assy. | 87-10-06 | |
| SB478A | Magneto, Slick Electro Bulletin No. 1-86, “Impulse Coupling Inspection” | ||
| SB480E | Filter Change, and Oil, and Screen Cleaning | ||
| SB483 | Carburetor, Facet Aerospace Products Bulletin No. A1-88, “Possible Loose 62-226 Pins” | ||
| SB485 | Fuel Injector, Precision Airmotive Corp. Service Bulletin No. PRS-92, “Contamination” | 89-13-02 | |
| SB486 | Inspection of Single Belt Driven Starter Ring Gear Support Assemblies | ||
| SB488A, 488-1 | Governor Line Support, Propeller | 90-04-06 | |
| SB495A | Carburetor, Precision Airmotive Corp. Bulletin No. MSA-1, Rev. 1, “Replacement of Composit Floats with Metal Floats” | ||
| SB496 | Fuel Pump, Lear Romec Service Bulletin No. 101SB019, “Relief of Valve Diaphragm Replacement” | ||
| SB497 | Fittings, Restricted Fuel Pump Vent, New, Installation in AN Drive | 91-08-07 | |
| SB500A | Fuel Pump, Lear Romec Service Bulletin No. 3402, “Rotary Fuel Pump – Non-Conforming Regulating Valve Diaphragm” | ||
| SB501B | Pin, Piston, P/N LW-14077, Recall of | 92-12-05 | |
| SB502 | Intake Valves, P/N LW-13262, Replacement, Etched with Date Code K-L | ||
| SB505B | Crankshaft ID, Inspection for Corrosion | ||
| SB508 | Magneto, Teledyne Continental Motors Bulletin No. 639, “Proper Installation of Impulse Couplings” | ||
| SB515 | Magneto, Teledyne Continental Motors Bulletin No. 643, “Maintenance Intervals for all TCM and Bendix Aircraft Magnetos and Related Equipment” | ||
| SB516 | Bendix and TCM S-20 and S-1200 Series Impulse Coupling Magnetos, Inspection and Removal | ||
| SB517, 517S-1 | Magneto, Teledyne Continental Motors Critical Bulletin No. CSB-641, “Possible Open Condition of SC-20, -200, -1200 Mag. Capacitor” | 94-06-09 | |
| SB518C | Bypass Valves, Thermostatic, Inspection of | ||
| SB519 | Tube, Shroud, Retaining Springs Removal of LW-14995 Before Further Flight | ||
| SB520 | Cylinder Kits P/N 05K21108, P/N 05K21118 and P/N 05K21104, Shipped with Incorrect Piston | ||
| SB524, 524S-1 | Aluminum and Sintered Iron Oil Pump Impellers, Replacement | 96-09-10 | required for IO-360-B1E |
| SB525A | Fuel Pump, Inspection of High Pressure, P/N LW-15473 | 96-23-03 | required for IO-360-B1E |
| SB526 | Impulse Coupling Springs or Impulse Coupling Assembly on TCM (Bendix) D-2000 or D-3000 Impulse Dual Magnetos, Replacement | ||
| SB527C | Pin, Piston, P/N LW-14077, Recall of | 97-15-11 | |
| SB528 | Magneto, Teledyne Continental Ignition Systems Bulletin No. SB658, “Distributor Gear Maintenance” | ||
| SB529B | Fuel Pump, Lear Romec Service Bulletin No. 101SB020, “Torquing of Relief Valve Cover Screws” | 2003-14-03 | required for IO-360-B1E |
| SB530B | Coating, Protective, Application on Crankshaft | 98-02-08 | required for IO-360-B1E |
| SB533A | Engine Stoppage, Recommendations Regarding Accidental | 2004-10-14 | required for IO-360-B1E |
| SB539A | Fuel Pump, Lear Romec Service Bulletins No. RG9080-73-001, No. RG9570-73-001, and No. RG17980-73-001, “Replacement of Valve Housing and Related Seals” | ||
| SB540 | Valve Seat Inspection | ||
| SB541 | Magneto, Teledyne Continental Motors Critical Bulletin No. CSB662A, “TCM D-200 and D-3000 Series Magneto Capacitors, P/N’s 10-382807, 10-382681, and 10-382681-1” | ||
| SB543B | Converter Plate Gasket, Oil Filter, Replacement | 2002-12-07 | |
| SB548A | Diaphragm-Type Fuel Pump Inspection/Replacement | ||
| SB549, 549S-1 | Crankshaft/Engine Inspection | ||
| SB555A | Inspection, Oil Pump Body Plug | ||
| SB557 | Fuel Injector, Precision Airmotive Corp. Service Bulletin No. PRS-105, “Servo Metered Fuel Pressure Port Leakage” | ||
| SB559 | Kelly Aerospace Power Systems Service Bulletin No. 112, Rev. A, “Recall of Starters Due to Potential Failure of the Drive Gear Assembly” | ||
| SB564 | Screen, Suction, Inspection of Length | ||
| SB565 | Diaphragm-Type Fuel Pump Inspection/Replacement | ||
| SB566, 566S-1 | Crankshaft Replacement in Lycoming Engines | 2005-19-11 | required for IO-360-B1E |
| SB568 | Magneto, Slick Aircraft Products Bulletin No. SB1-88B, “Periodic Inspection of Slick Models 6320, 6324, 6360, 6361, 6363 and 6365 Pressurized Magnetos” | ||
| SB569A | Crankshaft Retirement for Certain Lycoming Engines | 2006-20-09 |
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