September 29, 2010 MODELS AFFECTED All Lycoming: O-320-H1AD, -H1BD, -H2AD, -H2BD, -H3AD, -H3BD; (L)O-360-A1AD, -A1F6D, -A1G6D, -A1LD, -A3AD, -A4AD, -A5AD, -E1A6D; IO-360-A1B6D, -A1D6D, -A3B6D, -A3D6D, -C1E6D, -J1AD, -J1A6D; (L)TO-360-A1A6D, -C1A6D, -E1A6D, -F1A6D; TIO-360-C1A6D; (L)HIO-360-E1AD, -E1BD, -F1AD; O-540-H1A5D, -H1B5D, -H2A5D, -H2B5D, -J1A5D, -J1B5D, -J1C5D, -J1D5D, -J2A5D, -J2B5D,...

July 9, 2010 MODELS AFFECTED All Lycoming series engines. TIME OF COMPLIANCE Prior to flight and/or during engine operation. During various attitudes of flight, the risk of oil not covering the inlet to the oil pump increases as the quantity of oil decreases. Aerobatic engines frequently undergo unusual flight maneuvers, which include, but are not limited to, steep rates of descent and climb, and...

Supersedes Service Bulletin No. 591 May 10, 2010 MODELS AFFECTED All Lycoming engines equipped with a rebuilt Kelly Aerospace Energy Systems turbocharger manufactured between January 2007 and June 2009 as per the part effectivity in Table I and per the serial number effectivity in Table III found in the attached reprint. TIME OF COMPLIANCE Within 10 hours of engine operation or at the next...

December 15, 2009 This Supplement No. 1 is being issued to clarify the engines affected by Precision Airmotive Service Bulletin No. MSA-13 and Lycoming Engines Service Bulletin No. SB-582A.

DATE: March 17, 2009 MODELS AFFECTED Rebuilt, overhauled, or repaired Lycoming engines with the following cylinder kits installed: Engine Model Cylinder Kit O-320-H2AD 05K21119 (L)O-360-E1A6D 05K21121 (L)TO-360-E1A6D 05K21122 All Cylinder Kits P/N 05K21119, 05K21121, and 05K21122 that were shipped between November 20, 2008 and February 12, 2009. TIME OF COMPLIANCE For uninstalled cylinder kits...

November 13, 2009 MODELS AFFECTED The Kelly Aerospace 200F series fuel pump models listed below that were manufactured with serial numbers LAN001FP through MFN011FP (manufacture date between January 1, 2008 and June 25, 2009) and which have accumulated ten hours or less time in service. TIME OF COMPLIANCE Affected 200F series fuel pump must be replaced before further flight. If the replacement...

Supersedes Service Bulletin No. 471A February 20, 2009 MODELS AFFECTED Lycoming TIO-541-and TIGO-541 series engines. TIME OF COMPLIANCE At initial oil fill and every oil change thereafter. The additive contains an anti-scuffing agent. Laboratory tests indicate that occasionally when an engine is first started, particularly if the engine has not been used for an extended period, during cold weather...

November 19, 2009 MODELS AFFECTED Engines Shipped From Lycoming: All new, overhauled, rebuilt, or repaired (L)IO, AIO, HIO, IGO, IVO, (L)TIO, AEIO series engines with either a Precision Airmotive or Bendix RSA-5 or RSA-10 series Fuel Injection Servo, or a Precision Airmotive Silverhawk EX Fuel Injection Kit shipped from Lycoming between August 22, 2006 and April 2, 2008. Spares Shipped From...

Supersedes Service Bulletin No. 582 October 10, 2008 MODELS AFFECTED All Lycoming engines equipped with any Marvel-Schebler, Facet, Precision, or Volare carburetor model. TIME OF COMPLIANCE Within the next 30 days from the receipt of this Service Bulletin and at 30 day intervals until either the brass or advanced polymer float has been replaced with new foam float Precision P/N 30-860, 30-862 or...