Service Instruction No. 1042 AI

APPROVED SPARK PLUGS

Publications
DATE:

January 28, 2026

SUBJECT:

Approved Spark Plugs

MODELS AFFECTED:

All Lycoming piston aircraft engines

TIME OF COMPLIANCE:

As required for replacement

REASON FOR REVISION:

Added Lubricating Spark Plug Ignition Leads section. Added an “A” to some engine models for Champion REM 40E in Tables 2 and 3. Added an “A” for several engine models for Tempest spark plugs in Tables 2, 4, and 5. Added an “A” to 390 and 580 engine models for Champion REM 32E in Tables 4 and 5.

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