DATE: March 8, 2012 MODELS AFFECTED IO­540­AB1A5 or its applicable crankshaft that had propeller flange bushings replaced in the field in accordance with Service Instruction No. 1098G. This Service Bulletin applies only to Lycoming engine model IO­540­AB1A5 and applicable crankshafts that had the propeller flange bushings replaced in the field in accordance with Service Instruction No. 1098G. This...

Supersedes Service Bulletin No. 240V February 23, 2012 MODELS AFFECTED All Lycoming reciprocating aircraft engines TIME OF COMPLIANCE As specified in the Service Bulletin

DATE: November 22, 2011 MODELS AFFECTED Refer to Tables 1, 2, and 3. TIME OF COMPLIANCE At the next scheduled maintenance event or within the next 50 hours, not to exceed 12 months from the date of this Service Bulletin. This Service Bulletin is notification of required action for non-compliant oil fill tubes P/N 77527 sent from Lycoming Engines from May 17, 2011 to November 4, 2011. The inner...

Supersedes Service Bulletin No. 598 June 1, 2011 MODELS AFFECTED Lycoming engines, identified in Table 1, and spare clamps shipped from Lycoming between December 27, 2010 and May 25, 2011. TIME OF COMPLIANCE Before next flight, immediate inspection of engines (in Tables 1 and 2) that have not already been operated and have proven thermal stability at high power OR Within 10 hours of engine...

DATE: May 6, 2011 MODELS AFFECTED All Lycoming engines with S-20 and S-200 series TCM magnetos. TIME OF COMPLIANCE Within 50 hours of engine operation or at the next maintenance event, whichever occurs first. This Service Bulletin applies to the torque values for the four screws that are used to attach the ignition harness attachment plate for S-20 and S-200 series TCM magnetos on Lycoming engines...

DATE: May 4, 2011 MODELS AFFECTED Spare parts for the engine models identified in Table 1 shipped from Lycoming between August 18, 2010 and April 15, 2011 Lycoming engines, identified in Table 2, with P/N LW-13807 installed at time of purchase and shipped from Lycoming between August 18, 2010 and April 15, 2011. TIME OF COMPLIANCE Within 10 hours of engine operation or at the next maintenance...

MODELS AFFECTED Lycoming engines referenced in Table 1 in this Service Bulletin and Fuel Servo models referenced in Attachment A and Lot Numbers of fuel diaphragms and kits referenced in Attachment B in the AVStar Mandatory Service Bulletin AFS­SB6 Revision 2. TIME OF COMPLIANCE Within the next 5 hours of engine operation. The purpose of this Service Bulletin is to identify all Lycoming engines...

DATE: January 10, 2011 MODELS AFFECTED All Lycoming new, overhauled, or rebuilt turbocharged or turbo normalized engines, shown in Table 1, shipped before October 27, 2010 with HET or Kelly turbocharger installed and has less than 50 hours of service time (Refer to the attached Table 2 of HET Mandatory Service Bulletin 040 A) HET or Kelly turbocharger shipped as a spare part from Lycoming Engines...

November 22, 2010 MODELS AFFECTED All Lycoming aircraft engines TIME OF COMPLIANCE Preventive and Corrective Action for Engines Operated with Incorrect Fuel This Service Bulletin gives guidance when a Lycoming engine has been operated with incorrect fuel. Engine malfunction and damage could occur because of the use of incorrect fuels.

DATE: September 29, 2010 MODELS AFFECTED All Lycoming piston engines. TIME OF COMPLIANCE As required by the subject bulletin. This Service Bulletin contains information about required corrective action to take in response to engine overboost on Lycoming supercharged and turbocharged engines. This information was in Service Bulletin No. 369J. With the revision, Service Bulletin No. 369K, this...