Supersedes Service Instruction No. 1420
February 25, 2011
All Lycoming reciprocating aircraft engines with AN type gear driven fuel pump
TIME OF COMPLIANCE
Any time the pump is installed.
To decrease wear on the fuel pump drive spline, it is recommended that Castrol Contractor Special NLGI #1 or greases shown in the latest revision of Service Instruction No. 1059 be applied to the drive spline before the pump is installed on the engine.
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