Service Bulletin No. 613 

DATE: March 6, 2014 

MODELS AFFECTED

New, rebuilt, or overhauled Lycoming engine models and spares identified in Tables 1 and 2 in the attached bulletin.

Lycoming  turbocharger  P/N’s LW­12463, LW­13987, and LW­18470 fieldoverhauled or repaired with back plate (HET) P/N 406795­0058 (Refer to the  latest revision of (HET) Alert Service Bulletin No. 057.)

Service Bulletin No. 608

DATE: February 6, 2014

MODELS AFFECTED

Table A in the attached Service Bulletin.

TIME OF COMPLIANCE

Next maintenance event not to exceed 50 hours or before further flight if fuel leak found during preflight inspection.

In response to field reports of leaking Hartzell Engine Technologies’ (HET’s) fuel pump, Lycoming Engines requires replacement of all fuel pumps identified in Tables A and B with a verified fuel pump of the same part number.

Service Letter No. 259

January 23, 2014

To all owners and operators of Lycoming engine model O-360-A4M installed in Piper Archer III with AVStar carburetor model AV10-6102.

This Service Letter is notification of the following two product improvements by AVStar to carburetor model AV10-6102 (Lycoming P/N 61C26051). These product improvements have been incorporated into new O-360-A4M engines with Serial Numbers L-42322-36E and later and engines that were overhauled or rebuilt on or after November 13, 2013.

Service Letter No. 258

August 27, 2013 

To all Lycoming Engine Owners, Operators, and Authorized Lycoming  Distributors

This Service Letter is to advise customers, operators and authorized Lycoming distributors that External  Retaining  Ring P/N  MS16624­37 is superseded by P/N MS16624­2037 External Retaining Ring  (zinc coated).