DATE: June 11, 2010 MODELS AFFECTED All Lycoming new, overhauled, rebuilt, or repaired TIO-540-AE2A, IO-540- V4A5. TIME OF COMPLIANCE When upgrading to a Kelly Aerospace E-drive Starter. When replacing a starter with a Kelly Aerospace E-drive starter, there is insufficient clearance with the existing alternator bracket, P/N 07A19876. Successful installation of the Kelly Aerospace E-drive starter...

Supersedes Service Instruction No. 1238A January 6, 2010 MODELS AFFECTED Lycoming turbocharged engines. TIME OF COMPLIANCE When assembling V-band couplings to the engine. V-band couplings are employed by Lycoming on certain airframe applications such as the Piper Malibu and Saratoga or by other airframe manufacturers at various locations in turbocharger exhaust systems. They are used primarily to...

Supersedes Service Instruction No. 1246A December 15, 2009 MODELS AFFECTED O-235, O-290 series engines. TIME OF COMPLIANCE During engine overhaul or earlier at owner’s discretion. Although solid stem valves and bronze valve guides have been an ideal combination in smaller, low compression engines, operators of aircraft powered by these engines have encountered difficulties when forced to use...

Supersedes Service Instruction No. 1424 December 15, 2009 MODELS AFFECTED All Lycoming reciprocating engines using P/N 15B26066 except: O-235 series; O-320-H series; O, LO, TO, LTO-360-E series; and TIO, TIGO-541 series. TIME OF COMPLIANCE Any time new P/N 15B26066, hydraulic tappet plunger assemblies, are installed. Whenever a new plunger assembly is installed, perform the following steps to...

DATE: December 15, 2009 MODELS AFFECTED All Lycoming direct drive engines. Periodically aircraft engine starters are returned to Lycoming Engines as inoperative. Further research has shown that some of the returned starters have failed by overheating. Overheating is usually induced by an excessive duration of time used for the starting attempt (commonly referred to as a “crank”) and an excessive...

Supersedes Service Instruction No. 1267C August 28, 2009 MODELS AFFECTED All Lycoming engines with 5-1/8 inch cylinder bore: O-320; IO-320; O-340; O, IO, HO, LO, LIO, AIO, HIO, TIO, VO and IVO-360; IO-390; GO, VO and TVO-435; GO, GSO, IGSO-480; O, IO, VO, TIO, TVO, TIVO and IGSO- 540; TIO and TIGO-541; IO-580, AEIO-580; IO-720. TIME OF COMPLIANCE Any time piston pin plugs are replaced. There are...

DATE: August 28, 2009 This Supplement No. 1 is being issued to inform owners and operators of the following new connecting rod and crankshaft bearing part numbers. These new bearings are interchangeable with the corresponding current bearing part number as listed below in the Table.

Supersedes Service Instruction No. 1492C March 20, 2009 MODELS AFFECTED All Lycoming new or factory rebuilt or factory overhauled engines shipped from Lycoming after January 1, 1994, and all engines which have had a Lycoming Cylinder Kit installed after January 1, 1994, except O-235 models. TIME OF COMPLIANCE At next oil change/oil filter replacement, not to exceed 50 hours of engine operation...

DATE: February 23, 2009 MODELS AFFECTED All Lycoming new, overhauled, rebuilt, or repaired IO-360-A1B6, -B1G6, -C1E6, -C1G6, O-360-A1G6, and TIO-360-C1A6D engines. TIME OF COMPLIANCE At the next maintenance event or at annual inspection, whichever occurs first. Lycoming has determined that a crack may develop in the crankcase near the alternator attaching bracket on any of the above listed engine...