Supersedes Service Instruction No. 1533B
September 3, 2015
All Lycoming reciprocating aircraft engines
TIME OF COMPLIANCE
As Required for Replacement
REASON FOR REVISION
Changed two supplier part numbers
This Service Instruction is to inform owners and operators of a change to the part numbers for fuel pumps. The succeeding part numbers have been manufactured to be equivalent to the previous part numbers and are interchangeable with the previous part numbers. Table 1 identifies the previous fuel pump part numbers for both Lycoming and the supplier and the successive Lycoming part number and supplier part number.
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