Service Bulletin No. 595

DATE: May 6, 2011

MODELS AFFECTED

All Lycoming engines with S-20 and S-200 series TCM magnetos.

TIME OF COMPLIANCE

Within 50 hours of engine operation or at the next maintenance event, whichever occurs first.

This Service Bulletin applies to the torque values for the four screws that are used to attach the ignition harness attachment plate for S-20 and S-200 series TCM magnetos on Lycoming engines.

Service Bulletin No. 597

DATE: May 4, 2011

MODELS AFFECTED

Spare parts for the engine models identified in Table 1 shipped from Lycoming between August 18, 2010 and April 15, 2011 Lycoming engines, identified in Table 2, with P/N LW-13807 installed at time of purchase and shipped from Lycoming between August 18, 2010 and April 15, 2011.

TIME OF COMPLIANCE

Within 10 hours of engine operation or at the next maintenance event, whichever occurs first.

Service Bulletin No. 596 

MODELS AFFECTED

Lycoming engines referenced  in  Table 1 in this Service Bulletin and  Fuel  Servo models referenced  in  Attachment A and Lot Numbers of fuel diaphragms and kits referenced in Attachment B in the  AVStar Mandatory Service Bulletin AFS­SB6 Revision 2.

TIME OF COMPLIANCE

Within the next 5 hours of engine operation.

Service Instruction No. 1484 C

Supersedes Service Instruction No. 1484B

March 29, 2011 

MODELS AFFECTED

All Lycoming reciprocating aircraft engines

TIME OF COMPLIANCE

When installing  a  fuel metering  device,  carburetor, fuel injector servo or “AN” fuel pump 

This Service Instruction includes the steps and torque  values for installation of a fuel metering  device, carburetor, fuel injector servo or “AN” fuel pump.

Service Instruction No. 1442 A

Supersedes Service Instruction No. 1442

March 28, 2011

MODELS AFFECTED

All Lycoming piston engines with dual magneto accessory housing

TIME OF COMPLIANCE

At next overhaul or evidence of a filter element collapse

This Service Instruction identifies a new spring, P/N 05S21021 that replaces spring P/N 55C21021 in the oil filter bypass valve. This replacement is to be done during overhaul or if oil filter element collapse occurs during cold starts.

Service Instruction No. 1489 C

Supersedes Service Instruction No. 1489B

March 9, 2011

MODELS AFFECTED

IO-360-L2A model engines installed in Cessna 172R and 172S aircraft; IO- 540-AB1A5 model engines installed in Cessna 182 aircraft; IO-540-AC1A5 model engines installed in Cessna 206 aircraft; TIO-540-AJ1A model engines installed in Cessna T206 aircraft with a 2 psi fuel flow divider spring (with detail P/N 2576532-1 or 2576556-1 marked on top of cover).

TIME OF COMPLIANCE

At owner’s discretion.

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