Service Instruction

SI 1125

Lycoming Engines

Alternate Crankcase Parting Surface Sealants

Manufacturer document (opens in a new tab)

Issued: 2026-05-14
Revision: -
Document type: SI
Models covered: Not yet linked to models

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SI 1125

Lycoming Engines

Issued 2026-05-14

Manufacturer document

Manufacturer document; legal obligations depend on applicable requirements.

Alternate Crankcase Parting Surface Sealants

Source: Lycoming Engines, retrieved 2026-10-04 · manufacturer page (opens in a new tab)

A manufacturer bulletin is not an FAA rule; applicable ADs, binding Airworthiness Limitations or other governing requirements can require compliance; our bulletin content comprises number, title, date and applicability, with manufacturer attribution and a source link; the manufacturer’s document controls over our Record, subject to governing law; bulletin copyright remains with the manufacturer or other rights holder.

Bulletin document checked 2026-10-04: web page.

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