Service Instruction No. 1509
Replacement of all P/N STD 1409 Nuts with P/N STD-2249 Nuts
Publications
DATE: April 25, 2003
MODELS AFFECTED
All Lycoming aircraft engines.
TIME OF COMPLIANCE
Whenever a P/N STD-1409 nut is removed from the crankcase parting line in the sump or from any other application on the engine.
Any time a P/N STD-1409 nut is removed from the crankcase parting line in the sump or from any other location (such as the oil pump body on TIO and TIGO-541 models, the magnetos and oil pump support on VO-360 and IVO-360 models, the oil suction tube on O-235 and O-320 models, and other applications), it should be replaced with P/N STD-2249 slotted nut.
Get It Exchanged
Use our Engine Exchange Program to order a new, rebuilt, or overhauled engine to experience more airtime and less downtime.