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 hours until 500 hours of engine operation.

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                     

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 constitute the complete specification of the product.           

SUBJECT: LYCOMING ENGINES' PRODUCT SUPPORT HOURS 

DATE RELEASED:

JULY 12, 2019

TO:

Owners and Operators of Lycoming Aircraft Engines

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:

Whenever oil sump baffle replacement is necessary or at owner's discretion.

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.

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.

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.

Tappets and Lifters

DATE:

January 7, 2019

SUBJECT:

Tappets and Lifters

MODELS AFFECTED:

All Lycoming engines

TIME OF COMPLIANCE:

At overhaul or at owner’s discretion

REASON FOR REVISION:

Added new engine model, TEO-540 Series to Table 3.

Recommended Engine Procedures for Purge of Vapor During Ground Operations

DATE:

January 7, 2019

SUBJECT:

Recommended Engine Procedures for Purge of Vapor During Ground Operations

MODELS AFFECTED:

Lycoming engines equipped with fuel injection.

TIME OF COMPLIANCE:

As necessary during aircraft operations when symptoms of fuel vaporization are encountered.

REASON FOR REVISION:

Removed model specific references.