In the ECAM system, what is indicated by an amber memo on the left page?

An amber memo on the left page of the ECAM system is indicative of an Independent failure. This type of failure refers to an issue that arises without the influence of other systems or failures, allowing for more specific troubleshooting and response procedures to be followed. Independent failures are typically less critical than primary failures and do not immediately threaten the aircraft's safety but do require attention.

In contrast, a warning would typically be indicated through a different visual cue, often represented in red, signifying a serious issue requiring immediate action. Secondary failures are those that result from primary failures, thus indicating a chain of events rather than an isolated incident. Primary failures are critical faults that necessitate immediate pilot intervention. Understanding the distinctions between these categories is crucial for effective management of aircraft systems and maintaining safety during operations.