Supersedes Service Instruction No. 1438 December 9, 2005 MODELS AFFECTED All four and six cylinder, dual magneto engines with rear mounted propeller governor drives. TIME OF COMPLIANCE Anytime the propeller governor is installed. The use of a P/N LW-12347 propeller governor pad plate and two P/N 72053 gaskets on dual magneto engines with rear mounted propeller governor drives is necessary with...

Supersedes Service Instruction No. 1511 May 26, 2005 MODELS AFFECTED The following Textron Lycoming four cylinder engines which utilize fixed pitch propellers except those installed in rotary wing aircraft. All 320 series engines; and All 180 horsepower, 360 series engines except the O-360-A4A, -A4D, -A4G, -A4J, -A4K, -A4M, -A4N, -A4P, -C4F, -C4P, and AEIO-360-B4A engine models. TIME OF COMPLIANCE...

Supersedes Service Instruction No. 1164A April 12, 2005 MODELS AFFECTED All Lycoming direct drive engines except engines that incorporate an integral crankcase and accessory housing assembly. TIME OF COMPLIANCE When oil pump replacement is necessary. Replacement parts for the original two-piece oil pump body and cover assembly are no longer available. One-piece oil pump bodies which have been...

DATE: September 23, 2004 MODELS AFFECTED All Lycoming model engines. TIME OF COMPLIANCE Whenever new bearings are installed. Lycoming has recently upgraded the main and connecting rod bearings. The superseded bearing part numbers and the upgraded bearing part numbers are shown in the table below. Lycoming requires the use of the upgraded bearing whenever new bearings are installed.

DATE: September 23, 2004 MODELS AFFECTED Lycoming O-360-F1A6, IO-360-L2A, IO-540-AB1A5 and TIO-540-AK1A model engines employing PM2401 starters. (See Table below.) TIME OF COMPLIANCE Same as required for Lamar Service Information Letter No. LSI-009. This reprint is current at the time Lycoming Service Instruction No. 1513 is issued. However, when complying with this Service Instruction, insure...

Supersedes Service Instruction No. 1510 April 22, 2004 MODELS AFFECTED Lycoming AEIO-360-B1F aircraft engines installed in Grob G115E aircraft and AEIO-360-B1B aircraft engines installed in Grob G115EG. TIME OF COMPLIANCE At owner’s discretion. It has been found that some operators of the AEIO-360-B1B, -B1F engines with lightweight propellers have experienced higher than typical levels of...

Supersedes Service Instruction No. 1462 July 10, 2003 MODELS AFFECTED All Lycoming Direct Drive aircraft engines equipped with a propeller governor. TIME OF COMPLIANCE 1. Whenever sluggish propeller action is reported. 2. Whenever the engine does not hold RPM during cruise, climb or descent. 3. Whenever the engine is going into feather during landing roll out with reduced throttle setting. Front...

Supersedes Service Instruction No. 1485 July 2, 2003 MODELS AFFECTED All Lycoming reciprocating aircraft engines unless installed in a rotary-wing aircraft. TIME OF COMPLIANCE Half way to recommended TBO or at 1000 hours of operation, whichever occurs first or earlier at owner’s discretion or anytime valve sticking is suspected. As a product improvement, Lycoming has introduced a new exhaust valve...

DATE: April 25, 2003 MODELS AFFECTED All Lycoming aircraft engines. TIME OF COMPLIANCE Whenever a P/N STD-1409 nut is removed from the crankcase parting line in the sump or from any other application on the engine. Any time a P/N STD-1409 nut is removed from the crankcase parting line in the sump or from any other location (such as the oil pump body on TIO and TIGO-541 models, the magnetos and oil...

DATE: July 1, 2002 MODELS AFFECTED All Lycoming aircraft engines. TIME OF COMPLIANCE At engine start in cold weather. In extremely low temperatures, oil congeals, battery capacity is lowered, and the starter can be overworked. Improper cold weather starting can result in abnormal engine wear, reduced performance, shortened time between overhauls, or failure for the engine to operate properly.