What is the maximum time soap can remain on an aircraft?

The maximum time soap can remain on an aircraft is typically recommended to be 3-5 minutes. This timeframe is important for ensuring effective cleaning while preventing potential damage to the aircraft's surfaces.

Soap should be allowed to work for a limited time to break down grease and grime effectively. However, if soap is left on too long, it could become difficult to remove completely and may leave residue or cause deterioration of surfaces, especially if they are not coated or painted properly. Excessive dwell time can also lead to staining or corroding sensitive materials used in aircraft construction.

Selecting a duration within this 3-5 minute window balances the cleaning action of the soap with the need to protect the aircraft and maintain its integrity. Hence, 3-5 minutes is the optimal choice for ensuring both cleanliness and preservation.