February 25, 2011 

MODELS AFFECTED

All Lycoming engines incorporating parallel valves except O­235 Series, O­290 Series, O­320­H Series and TO­360­E Series.

TIME OF COMPLIANCE

Anytime valve rocker assemblies are removed. 

Supersedes Service Instruction No. 1508B

February 10, 2011 

MODELS AFFECTED

All Lycoming engines with dual magnetos

TIME OF COMPLIANCE

At the next oil change, not to exceed 50 hours of engine operation or at each  magneto timing check or service

DATE: February 4, 2011

MODELS AFFECTED

AEIO-540-D4B5 Model Engine Installed in H.A.L. HPT-32 Aircraft.

TIME OF COMPLIANCE

At owner’s discretion.

DATE: February 4, 2011

MODELS AFFECTED

All Lycoming aircraft engines.

TIME OF COMPLIANCE

Immediately after flight or ground operation in particulate-laden atmospheres.

This service instruction gives guidelines for operation, inspection, and service of Lycoming engines which have been operated in atmospheres that have particulate matter such as dust, sand, debris, and volcanic ash.

DATE: January 27, 2011

MODELS AFFECTED

All Lycoming aircraft engines using automotive fuel.

TIME OF COMPLIANCE

Before engine storage for a duration of 6-months or longer.

The Service Instruction only applies to Lycoming engines that have been operated on automotive fuel (as specified in the latest revision of Service Instruction No. 1070) and are to be stored for 6 or more consecutive months.

January 14, 2011

To all Owners and Operators of Lycoming O-235 Aircraft Engines

This Service Letter introduces the new upgraded O-235 crankcase and associated replacement part numbers available as an option to replace the existing O-235 crankcases.

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 before October 27, 2010 (Refer to the attached Table 1 and 1b of HET Mandatory Service Bulletin 040 A.)

DATE RELEASED:

January 2011

TITLE:

TIO-540-AA1AD Parts Catalog

DOCUMENT PART NUMBER:

PC-315-4

MODELS AFFECTED:

TIO-540-AA1AD

DATE RELEASED:

January 2011

TITLE:

IO-360-M1B Parts Catalog

DOCUMENT PART NUMBER:

PC-306-16

MODELS AFFECTED:

IO-360-M1B series

Supersedes Service Instruction No. 1427B

December 29, 2010 

MODELS AFFECTED

All fixed  wing  and  rotary wing  aircraft (horizontal installations only) with  Lycoming reciprocating aircraft engines installed 

TIME OF COMPLIANCE

After field overhaul