Supersedes Service Instruction No. 1423
May 13, 2016
All Lycoming engines using Thermostatic Oil Cooler Bypass Valve Part Number (P/N) 75944
Before next flight REASON FOR REVISION: Loctite® procedure for crimp nut is no longer valid. New superseding part number for thermostatic oil cooler bypass valve.
Supersedes Service Instruction No. 1301A
May 13, 2016
All Lycoming aircraft engines
Any time a fuel line for a fuel injector, primer or fuel manifold are replaced
Update part numbers
Fuel lines are to be examined, typically every 100 hours of engine operation or sooner if instructed. If a fuel line is damaged, it is to be replaced with a new fuel line. Fuel lines are not to be repaired.
Supersedes Service Instruction No. 1255
May 13, 2016
Lycoming engines using thermostatic oil cooler bypass valve
At 100-hour inspection or when high oil temperature is noted
Updated bypass valve replacement part numbers; added respective detailed bypass valve replacement instructions for engines with oil pressure screens and oil filters
Supersedes Service Letter No. L255
May 13, 2016
To All Owners and Operators of Lycoming Piston Aircraft Engines
An alternate diaphragm-type fuel pump P/N 62B26931 is approved as an equivalent replacement for the current fuel pump P/N LW-15473 except as noted in Table 1.
May 2016
TIO-540-AJ1A
PC-TIO-540-AJ1A
TIO-540-AJ1A
PC-TIO-540-AJ1A (Supersedes PC-315-12)
May 2016
O-320-B1A Parts Catalogg
PC-O-320-B1A
O-320-B1A
DATE: April 5, 2016
IO-360-M Series Engines
At the next oil change
This Service Bulletin is notification to replace the oil level gage (dipstick) P/N LW-16783-18 with a new oil level gage P/N LW-14760 on affected Lycoming engine models. This replacement is mandatory and must be done at the next oil change.
Supersedes Service Instruction No. 1523F
March 16, 2016
Refer to Table 1 in attached Instruction
As Required for Replacement
Added carburetor part numbers to Table 1
This Service Instruction identifies carburetors from specific manufacturers currently available for Lycoming engine models. Table 1 identifies the carburetor models, Lycoming part numbers, and applicable manufacturer cross-references for corresponding Lycoming engine models.
DATE: March 10, 2016
The following Wide Cylinder Flange Engines that are equipped with a front crankcase mounted propeller governor:
At owner’s discretion.
DATE: March 10, 2016
All Lycoming engine models.
As required.
This Service Instruction contains guidelines for the use of safety cable when installing fasteners or components on Lycoming engine models.
