Service Bulletin No. 622A Reprint of Slick/Champion Aerospace Service Bulletin SB1-15A March 13, 2019 MODELS AFFECTED All Lycoming engines in Table 1 equipped with Slick 4200, 4300, or 4700 Series (LASAR) magnetos. TIME OF COMPLIANCE Next maintenance event, not to exceed 50 hours. This Service Bulletin is notification of required action for mandatory compliance with Slick/Champion Aerospace...

Service Bulletin No. 637 Reprint of Slick/Champion Aerospace Service Bulletin SB1-19 March 14, 2019 MODELS AFFECTED All 4 and 6-cylinder Lycoming engines equipped with Slick 4300 or 6300 Series Impulse Coupled Magnetos. TIME OF COMPLIANCE Next maintenance event, or 400 hours total time in service of the magneto (whichever occurs first), then every 500 hours after the initial inspection. This...

NEW TURBOCHARGER MOUNTING HARDWARE DATE March 21, 2019 MODELS AFFECTED TO-360-C and -F series engines TIME OF COMPLIANCE At owner’s discretion or when part replacement is necessary. REASON FOR REVISION Revision A is being released to update the P/N of the strut assembly and various hardware P/N’s along with reformatting of the service instruction.

Oil Sump Baffle Replacement Supersedes Service Instruction No. 1279C May 15, 2019 MODELS AFFECTED: IO-540-AA1A5, -AA1B5, -AE1A5, -E1A5, -E1B5, -K1A5, -K1B5, -K1D5, -K1E5, -K1F5, -K1G5, -K1H5, -K1J5, -K1K5, -K1A5D, -K1G5D, -K1J5D, -L1C5, -M1A5, -M1C5, -M1B5D, -S1A5 TIO-540-A2B, -A2C, -AE2A, -AH1A, -F2BD, -J2B, -J2BD, -S1AD, -U2A LTIO-540-F2BD, -J2B, -J2BD, -U2A IO-580-B1A TIME OF COMPLIANCE...

SUBJECT: LYCOMING ENGINES' PRODUCT SUPPORT HOURS DATE RELEASED: JULY 12, 2019 TO: Owners and Operators of Lycoming Aircraft Engines

SUBJECT: LYCOMING MODEL DESIGNATION FOR FUEL INJECTORS DATE: October 10, 2019 TO: All Owners and Operators of Lycoming Piston Aircraft Engines Lycoming Engines’ naming convention for fuel injector model designations is identified in the table of Service Letter Number 279. The naming convention is intended to describe the general feature set specification of the fuel injector and does not...

SERVICE LETTER NO. 277 HARTZELL ENGINE TECHNOLOGIES AND LYCOMING ENGINES ALTERNATOR DISTRIBUTION AGREEMENT DATE RELEASED: December 17, 2019 TO: Owners and Operators of Lycoming Aircraft Engines

Service Bulletin No. 639 Inspection of Rocker Arm, Part Number LW-15014 January 17, 2020 MODELS AFFECTED O-320-H2AD, O, LO, TO, LTO-360-E1A6D new, rebuilt, or overhauled engines shipped from Lycoming since June 2017 with less than 500 hours of operation or engines with less than 500 hours of operation since rocker arm replacement. TIME OF COMPLIANCE At next scheduled oil change, then every 50...

NEW CONNECTING ROD BUSHING DATE: March 12, 2020 SUBJECT: New Connecting Rod Bushing MODELS AFFECTED: All Lycoming Engine Models TIME OF COMPLIANCE: As Required