What is the appropriate action if ice accretion is present during single engine taxi?

During a single-engine taxi, if ice accretion is present, the appropriate action is to abandon the single-engine taxi. This decision is important for maintaining control of the aircraft and ensuring safety. Ice can significantly affect the aircraft's performance and handling characteristics, especially when operating at reduced thrust on one engine. The risks associated with maintaining a single-engine taxi while ice is present include loss of control or inadequate acceleration if a need arises to use the operating engine more aggressively. Therefore, it is prudent to not continue taxiing and instead revert to a safer operational mode that allows better control of the aircraft under potentially hazardous conditions.

This approach prioritizes safety, as the aircraft may not have predictable handling characteristics when ice is involved, making it wise to avoid any actions that could compromise control during the taxi phase.