Service Bulletin No. 637

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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

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Service Bulletin No. 622A

Reprint of Slick/Champion Aerospace Service Bulletin SB1-15

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.

Service Bulletin No. 369 R

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Engine Inspection after Overspeed
DATE:

January 7, 2019

SUBJECT:

Engine Inspection after Overspeed

MODELS AFFECTED:

All Lycoming piston engines.

TIME OF COMPLIANCE:

As required by the subject bulletin.

REASON FOR REVISION:

Added new engine models, TEO-540-A1A and TEO-540-C1A Series to Table 1. Corrected HIO-390-A1A overspeed RPM in Table 2.

Service Bulletin No. 634

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Cylinder and Head Assembly Serviceable Life
DATE:

October 11, 2018

SUBJECT:

Cylinder and Head Assembly Serviceable Life

MODELS AFFECTED:

All Lycoming Engines with Parallel Valve Cylinder and Head Assemblies (Table 1) shipped from Lycoming Engines between 1-SEP-2013 and 30-APR-2015 (excludes O-235 series)

TIME OF COMPLIANCE:

During Cylinder and Head Assembly removal for condition or overhaul

Service Bulletin No. 627 E

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EXHAUST SYSTEM INSPECTION
DATE:

May 17, 2018

SUBJECT:

Exhaust System Inspection

MODELS AFFECTED:

Lycoming Engine Model TIO-540-AJ1A

TIME OF COMPLIANCE:

If the Exhaust System is not replaced per this revision, after the initial Exhaust System Inspection, continue with subsequent repetitive Exhaust System Inspections per Table 2 in this Service Bulletin

Service Bulletin No. 633

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Oil Level Gage (Dipstick) Replacement 

DATE:

December 20, 2017

MODELS AFFECTED:

Lycoming Engines TIO-540-AH1A installed in Gripps Aero/Mahindra Turbocharged GA8 Airvans

TIME OF COMPLIANCE:

At owner's discretion, during next scheduled maintenance event

Service Bulletin No. 626 A

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AVStar Flow Divider (Lycoming Fuel Manifold) Inspection 

DATE:

December 20, 2017

MODELS AFFECTED:

Refer to Tables 1 and 2

TIME OF COMPLIANCE:

10 hours of engine operation or sooner if experiencing reduced fuel flow

Service Bulletin No. 628

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REPRINT OF HARTZELL ENGINE TECHNOLOGIES' SERVICE BULLETIN ASB 069
DATE:

August 29, 2017

MODELS AFFECTED:

Table 2 in this Service Bulletin

TIME OF COMPLIANCE:

Next maintenance event not to exceed 25 hours or before further flight if fuel leak found during preflight inspection

 

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