Lycoming sb 477 Several Piper PA-28 Warrior submitters said they felt better quality control is needed in the manufacture of this part and, given the crankshaft recall of 2002/2003, better quality control in general. The Lycoming overhaul manual says the two rocker arms are different & cautions not to mix Oct 21, 2016 · Lycoming specified the magnet tool and mechanical fingers in the SB. ) A list of downloadable Service Bulletins affecting Lycoming engines. ) Sep 24, 2025 · Technical Publications Sign up to receive an email notification when Lycoming publishes a technical publication on our website. In addition to the operator’s manuals, installation and operation manuals, service manuals, maintenance manuals,overhaul manuals, and parts catalogs that are published to maintain and operate the various models of Lycoming enginesin airworthy condition; bulletins, letters, and instructions are issued as required to inform all concerned of new policies,products, modifications, and maintenance May 25, 2017 · As a Lycoming customer, you have access to our worldwide team of authorized distributors and service centers. GENERAL The Service Bulletin and Service Letter Index is split by publication type (i. TIME OF COMPLIANCE During overhaul, after a propeller strike, or whenever crankshaft gear removal is required. Apr 2, 2025 · As a Lycoming customer, you have access to our worldwide team of authorized distributors and service centers. 477 (AD 87-10-06). Sep 17, 2016 · NOTE Before reusing Rocker Arm Assembly P/N LW18970, refer to the latest revision of Lycoming Service Bulletin No. 639 Inspection of Rocker Arm, Part Number LW-15014 January 17, 2020 MODELS AFFECTED O-320-H2AD, O, LO, TO, LTO-360-E1A6D new, rebuilt, or overhauled engines shipped from Lycoming since June 2017 with less than 500 hours of operation or engines with less than 500 hours of operation since rocker arm replacement. Examine fuel lines every 100 hours, annual inspection, overhaul and any time fuel lines or clamps are serviced . Applies to all Lycoming aircraft engines (not just direct drive engines); added checklist specific for Lycoming geared engines; updated checklist which applies to all other Lycoming aircraft engines, added check for connecting rod squareness to the checklists. 552 (a)(1). Service Instructions describe modifications, processes, and other information pertinent to the maintenance, repair, and overhaul of Lycoming engines. TIME OF COMPLIANCE At next scheduled oil change, then every 50 NOTICE: Incomplete review of all the information in this document can cause errors. To prevent excessive wear and oil system contamination associated with hydraulic lifters spalling, add one 6-ounce can of Lycoming P/N LW-16702 oil additive per Lycoming SB 446E. , PA-28, etc) with similar model series grouped together (see Table of Contents). TIME OF COMPLIANCE Within the next 50 hours of engine operation and every 50 hours thereafter during routine engine maintenance REASON FOR REVISION Correct the CAUTION after Step 3. Lycoming Engines SB 342H contains the same information and intent as MSB 342G and all its associated approved supplements. TIME OF COMPLIANCE At initial oil fill and every oil change thereafter. I find I have two part numbers: 69443D which have large oil discharge orifice essentially on the radius of May 25, 2017 · As a Lycoming customer, you have access to our worldwide team of authorized distributors and service centers. 477 (AD 87 10 06). Most SBs are displayed in PDF format. Prior to P/N LW 18790 Rocker Arm Assembly, one (1) each of Rocker Arm Assembly P/N 69444 (intake) and P/N 74636 (exhaust) were installed on the respective intake and exhaust valve. In addition to the operator’s manuals, installation and operation manuals, service manuals, maintenance manuals, overhaul manuals, and parts catalogs that are published to maintain and operate the various models of Lycoming engines in airworthy condition; bulletins, letters, and instructions are issued as required to inform all concerned of new policies, products, modifications, and Mar 9, 2007 · If a replacement is required, part number LW18790 or 17F19353 (these must be in compliance with Lycoming Service Bulletin 477 or AD Note 87-10-06) may be used as direct replacements for either the 69444 or the 74636. SB 477, as introduced, Committee on Housing. , SB or SL) and then arranged by aircraft model number (i. 342G (Supersedes Service Bulletin No. Within these series, applicable service bulletins/letters are listed in numerical order. 471A February 20, 2009 MODELS AFFECTED Lycoming TIO-541-and TIGO-541 series engines. Oct 29, 2019 · Lycoming SB 477 calls for inspection and rework of P/N LW-18790 rocker arm assembly. Please contact Lycoming for the most up to date information. 365. (Use your Browser's 'Edit | Find' function to locate an SB by number. C. Jan 30, 2003 · Supersedes Service Bulletin No. Examine fuel lines every 100 hours, annual inspection, overhaul and any time fuel lines or clamps are serviced Selected Textron Lycoming service bulletins Service Bulletins 240N (Mandatory Parts Replacement at overhaul) 301B (Maintenance and service for valves 369I (Inspection after overspeed) 381C (Oil Pump Woodruff Key Drive) 385C (Oil Pump Impeller Replacement) 388B (Determining Exhaust Valve and Guide Condition) Jan 31, 2010 · How can you tell which rocker arm goes to the intake and which one goes to the exhaust? The ones on my narrow deck Lycoming O-320 look the same, except one rocker arm has an oil hole on the underside. AVCO Lycoming Textron SB No. Existing law provides for the creation by local ordinance, or by ministerial approval if a local agency has not adopted an ordinance, of accessory dwelling units to allow single-family or multifamily dwelling residential use in accordance with specified standards and conditions. Service Information: Textron Lycoming Alternative Names: (Avco Lycoming, Lycoming Engines) There will be over 135,000 documents in our Service Information Indexes. This AD revised to mandate Lycoming SB No. NONE OF THIS INFORMATION IS GUARANTEED TO BE ACCURATE OR TIMELY. S. May 24, 2015 · Take a look at Lycoming SB 1454A and SB 477 You must log in or register to reply here. 342F) Engineering Aspects are FAA Approved Fuel Line (Stainless Steel Tube Assy. TEXTRON LYCOMING HAS NO AFFILIATION WITH THIS SITE. 475B January 30, 2003 MODELS AFFECTED All Lycoming direct drive piston aircraft engines (including VO-360 and IVO-360; excepting O-320-H, O-360-E, LO-360-E, TO-360-E, LTO-360-E, and TIO-541 series engines). 1098G SB-601 Non-Compliant Oil Fill Tubes P/N 77527 SB-599 Compliance with Hartzell In addition to the operator’s manuals, overhaul manuals, and parts catalogs that are published for the various models of Textron Lycoming engines; bulletins, letters and instructions are issued as required to inform all concerned of new policies, products, modifications, and maintenance information applicable to the support of Textron Lycoming aircraft engines. This Service Bulletin contains required action 1) to identify connecting rods that contain bushings that do not meet Lycoming Engine’s specifications and 2) any applicable follow-up corrective action. Looking at the Lycoming parts manual, the parallel valve engines (O-320-B2A) should have identical intake and exhaust rockers. No action required if already in compliance with Lycoming SB No. DO NOT USE THIS INFORMATION FOR THE PURPOSES OF OPERATING OR MAINTAINING ANY EQUIPMENT. Service Letters are issued to explain service policies and introduce new products or processes approved for Lycoming engines. We found the fingers more difficult to manipulate than a simple stiff wire hook lowered through the upper plug hole which actually worked quite well with the magnet. SB-602 Incorrect Part Numbers on Service Instruction No. Inspect lubrication system for metal contaminants. 477A, dated February 16, 1987, identified and described in this document, is incorporated herein and made a part hereof pursuant to 5 U. An examination of the airplane's engine maintenance records (excerpts attached) indicated that the engine, a Lycoming O-320- E2D, underwent a complete overhaul by Textron Lycoming, Inc, Williamsport, Pennsylvania, and was "zero" timed on June 6, 1988. Not all service bulletins are included and this resource is for reference only. Alternatively, oil that already contains the additive LW-16702 in the correct proportions may be used. D. It pays to make sure this critical item has been taken care of. ) and Support Clamp Inspection and Installation All fuel injected Lycoming engines indicated in fuel line and clamping diagrams. 336C required the periodic inspection and lubrication of magneto distributor bushings and the periodic replacement of certain magneto parts. Jun 2, 2016 · June 2, 2016 MODELS AFFECTED All Lycoming engines equipped with Marvel-Schebler, Facet, Precision, or Volare updraft carburetor models MA-3A, MA-3PA, MA-3SPA, MA-4SPA, MA-4-5, MA-4-5AA, and MA-6AA. NOTE The new Rocker Arm Assembly P/N 17F19357 can be installed in either the intake or exhaust valve position without changing the other rocker on that cylinder. e. THIS INFORMATION IS FOR EDUCATIONAL PURPOSES ONLY ALPHABETICAL LISTING OF TEXTRON LYCOMING SERVICE BULLETINS, LETTERS AND INSTRUCTIONS * - Indicates Airworthiness Directive (A. 336C no longer active. END insert Supplement 1 Insert: COMPLIANCE lAW LYCOMING MSB 342E, DIAGRAM# 17 N/A BY INJECTOR MODEL lAW TillS AD N/ A BY CYLINDER MANUFACTURER lAW THIS AD NIA BY CONNECTING ROD MFG lAW TillS AD N/A BY CRANKSHAFT SIN lAW LYCOMING MSB 566 COMPLIANCE BY C'SHAFT GEAR/BOLT PIN lAW MSB 475C COMPLIANCE BY CRANKSHAFT BOLT lAW L YC MSB 554 S5 BY FUEL PUMP TYPE lAW TillS AD NIA N/A BY Feb 25, 2011 · As a Lycoming customer, you have access to our worldwide team of authorized distributors and service centers. Lycoming Engines SB 342H does not change the scope or intent of the AD 2015-19-07. Information here is only to be use for entertainment purposes. Inactive SB No. Complete sets of Service Bulletins, Instructions and Letters are available for purchase in both hard copy and electronic form either directly from Lycoming or through a Lycoming Distributor. Service Bulletins are available from Lycoming Distributors. The Lycoming team helps you stay up-to-date on industry insights, and provides information about how to care for your engine. Jan 19, 2007 · I took poor notes during dissasembly and am now confused. Incomplete review of all the information in this document can cause errors. Service Letters are issued to In addition to the operator’s manuals, installation and operation manuals, service manuals, maintenance manuals, overhaul manuals, and parts catalogs that are published to maintain and operate the various models of Lycoming engines in airworthy condition; bulletins, letters, and instructions are issued as required to inform all concerned of new policies, products, modifications, and Jan 17, 2020 · Service Bulletin No. Read the entire Service Bulletin to make sure you have a complete understanding of the requirements. 365 with Lycoming SB No. Before reusing Rocker Arm Assembly P/N LW 18790, refer to the latest revision of Lycoming Service Bulletin No. Feb 20, 2009 · Supersedes Service Bulletin No. Aug 4, 2017 · As a Lycoming customer, you have access to our worldwide team of authorized distributors and service centers. July 16, 2013 Service Bulletin No. Feb 18, 2007 · Lycoming is the only official source for information about their products. Accessory dwelling units. May 28, 2013 · A list of the most frequently asked questions and issues from customers and a list of field practices that Lycoming Engines would like to see addressed, eliminated, or changed Jan 31, 2010 · How can you tell which rocker arm goes to the intake and which one goes to the exhaust? The ones on my narrow deck Lycoming O-320 look the same, except one rocker arm has an oil hole on the underside. zqmdts x7dr pmo lbdbz 0rt 32r8t anyr tnvb dxpfzm wxjduopg