How long can soap remain on an aircraft?

Soap should not remain on an aircraft surface longer than 3-5 minutes during cleaning procedures. This timeframe is critical to ensure that the soap does not start to dry or cause any potential damage to the aircraft's surface. If left too long, soap can lead to residue buildup, which may affect the finish or integrity of coatings, leading to maintenance challenges down the line. Thus, adhering to the 3-5 minute window allows for the effective cleaning of surfaces while minimizing risks associated with prolonged contact with soap. Choosing this timeframe strikes a balance between ensuring effective cleaning and safeguarding the aircraft's materials and finishes.