Service Instructions describe modification, processes and other information pertinent to maintenance repair and overhaul of Textron Lycoming engines. Lycoming AD & MSB No. 632B, dated August 4, 2017, except for the instruction to complete the online survey as specified in the MSB. Service Bulletin No. 632A) Engineering Aspects are FAA Approved SUBJECT: Identification of Connecting Rods with Non-Conforming Small End Bushings MODELS AFFECTED: Supersedes Service Bulletin No. Since we issued AD 2006-20-09, Lycoming Engines discovered that the March 1, 1997 start date of affected engine models in Mandatory Service Bulletin (MSB) No. Engines affected by this AD are listed in Mandatory Service Bulletin No. All 4 and 6-cylinder Lycoming engines equipped with Slick 4300 or 6300 Series Impulse Coupled Magnetos. If your engine was overhauled by Penn Yan Aero after November 2015, please review the parts list supplied with your engine overhaul and determine if SL-13923A bushings were used. 639 632B . Added new engine model IO-390-D to Table 1. 632. 632B, dated 4 August 2017, and All Lycoming engines that were overhauled or repaired using any replacement part listed in Table 2 of Lycoming Engines MSB No. January 17, 2020. mlns:og="http://opengraphprotocol.org/schema/">, (1) Engines with a serial number listed in Table 1 of this Service Bulletin Service Bulletins (published since April 1960) describe mandatory procedures that must be observed for safety reasons, and readily identified by the mandatory heading printed in red. The MSB describes procedures for inspecting connecting rods and replacing connecting rod small end bushings. Cylinder and Head Assembly Serviceable Life, All Lycoming Engines with Parallel Valve Cylinder and Head Assemblies (Table 1) shipped from Lycoming Engines between 1-SEP-2013 and 30-APR-2015 (excludes O-235 series), During Cylinder and Head Assembly removal for condition or overhaul, If the Exhaust System is not replaced per this revision, after the initial Exhaust System Inspection, continue with subsequent repetitive Exhaust System Inspections per Table 2 in this Service Bulletin, Lycoming Engines TIO-540-AH1A installed in Gripps Aero/Mahindra Turbocharged GA8 Airvans, At owner's discretion, during next scheduled maintenance event, 10 hours of engine operation or sooner if experiencing reduced fuel flow, Next maintenance event not to exceed 25 hours or before further flight if fuel leak found during preflight inspection. The FAA has issued Emergency AD 2017-16-11, affecting certain specific Lycoming engines including five that may be installed on Beech Travel Air 95s or B95s. (c) Applicability This AD applies to: (1) All Lycoming Engines reciprocating engines listed in Table 1 of Lycoming Engines Mandatory Service Bulletin (MSB) No. Lycoming's Mandatory Service Bulletin 632 If your engine was overhauled by Penn Yan Aero prior to November 2015, then Lycoming's Mandatory Service Bulletin 632 does not apply. TIME OF COMPLIANCE Next maintenance event, or 400 hours total time in service of the magneto (whichever occurs first), then every 500 hours after the initial Let the dust settle on this service bulletin, and then make a decision. Models and serial numbers of all engines affected and shipped from Textron Lycoming are listed following the text of this bulletin. Textron Lycoming engines. 632. 632B, dated 4 August 2017, and. Added a new NOTICE before the Magneto Overspeed Inspection section. 569A, dated April 11, 2006. Lycoming quickly published two revisions (632A and 632B) in rapid succession. The Service Bulletin opens with a warning to owners: “You must complete the… Lycoming Engines is an Operating Division of Avco Corporation. Any DA40 related topics. DATE: August 4, 2017 MODELS AFFECTED: (1) Engines with a serial number listed in Table 1 of this Service Bulletin (2) Engines that have been overhauled or repaired that could contain connecting rod assemblies or connecting rod bushings shipped from Lycoming during dates identified in Table 2 of this Service Bulletin TIME OF COMPLIANCE: Within the next 10 hours of engine This AD requires accomplishing the instructions in Lycoming Engines MSB No. Also, listen to today’s episode, to get some good information about the new Service Bulletin on Lycoming connecting rod bushings – MSB 632B. All Lycoming engines listed in Table 1 of Lycoming Engines Mandatory Service Bulletin (MSB) No. Wed Aug 23, 2017 8:29 pm. You may have heard by now that this past Monday, Lycoming issued Service Bulletin 632. 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