What procedure must be accomplished to prevent materials from entering the engine openings?

• A. Seal all openings with tape.
• B. Plug the openings with metal caps.
• C. Cover all openings as they are exposed.
• D. Leave openings open for ventilation.

Answer: (D)

Preventing debris from entering engine openings hinges on covering every opening with purpose-made protective covers as soon as it’s exposed. These caps or plugs are designed to fit the specific opening and are secured so nothing can fall inside during maintenance. Tape isn’t a reliable seal because it can peel away, leave adhesive residues, and fail to protect irregular shapes. Leaving openings unprotected for ventilation invites dirt, chips, and other contaminants to enter, risking foreign object damage when the engine is operated later. So, the correct approach is to cover all exposed openings with the appropriate protective hardware to keep the engine clean and safe during overhaul and maintenance.