Table 1 of Lycoming Mandatory Service Bulletin (MSB) 634, dated 11 October 2018, or later FAA approved revision. 50lA) Engineering Aspects are FAA Approved Recall of Piston Pi Part No. Determine if your engine contains an affected cylinder and head assembly with the local thin wall condition using Table 1 of Lycoming MSB No. 501B (Supersedes Service Bulletin No. 634. Requirement: To prevent loss of engine power due … ... SB-634 Cylinder Retirement (pdf) Download. 632 S.B. 1 Alphabetical Listing of Lycoming Service Bulletins, Letters, and Instructions * - Lycoming ... (A.D. #62-03-02) S.I. 634, dated October 11, 2018, to address the cylinder and head assembly cracking. Textron Lycoming engines. [ local copy] 273 Customer Care Program, Service Bulletin No. SB-240W Mandatory Parts Replacement at Overhaul (pdf) Download. Note: DCA/LYC/224A revised to introduce a repetitive . Lycoming MSB No. * DCA/LYC/224A Lycoming Parallel Valve Cylinder and Head Assemblies – Inspection Applicability: All Lycoming engines fitted with p. arallel valve cylinder and head assemblies listed in Table 1 of Lycoming Mandatory Service Bulletin (MSB) 634, dated 11 October 2018, or later FAA approved revision. 634 here Next you’re going to need Service Bulletin No. * DCA/LYC/224A Lycoming Parallel Valve Cylinder and Head Assemblies – Inspection Applicability: All Lycoming engines fitted with parallel valve cylinder and head assemblies listed in Table 1 of Lycoming Mandatory Service Bulletin (MSB) 634, dated 11 October 2018, or later FAA approved revision. 634, dated October 11, 2018, or later revision. 634 Cylinder and Head Assembly Serviceable Life S.B. 029, dated February 1, 2008, Kelly Aerospace Power Systems MSB No. Service Instructions describe modification, processes and other information pertinent to maintenance repair and overhaul of Textron Lycoming engines. Service Bulletins (published since April 1960) describe mandatory procedures that must be observed for safety reasons, and readily identified by the mandatory heading printed Service Bulletin No. ... SI-1181 Color Code on Cylinders for Lycoming Engines (pdf) Download. Lycoming published Lycoming Mandatory Service Bulletin (MSB) No. Read the entire SAIB by clicking here. Note: 1299B Cushion and Magneto Drive Gear Modification S.L. LW-14077 MODELS AFFECTED. Lycoming has just issued a service bulletin No. Downlad Service Bulletin No. The bulletin is here (PDF). 634, under which certain parallel-valve cylinder and head assemblies shipped between 01/09/2013 and 30/04/2015 have to be retired at the nearest overhaul. * DCA/LYC/224A Lycoming Parallel Valve Cylinder and Head Assemblies – Inspection Applicability: All Lycoming engines fitted with p. arallel valve cylinder and head assemblies listed in Table 1 of Lycoming Mandatory Service Bulletin (MSB) 634, dated 11 October 2018, or later FAA approved revision. 634 lists the population of affected cylinders and head assemblies, identifies symptoms, and cautions not to repair, refurbish, or overhaul the affected cylinder and head assemblies. Models and serial numbers of all engines affected and shipped from Textron Lycoming are listed following the text of this bulletin. Service Instructions - Operational. 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