What is indicated by a green light in the MAINT FDR?

• A. No maintenance needed
• B. Systems operational
• C. IDARS memory is full
• D. IDARS memory is 80% full or over-G may have occurred

Answer: (D)

In the context of the MAINT FDR, a green light specifically indicates that the IDARS (Integrated Data Acquisition and Recording System) memory is 80% full or that an over-G event may have occurred. This status informs the operator that certain thresholds regarding system performance and data management have been reached, suggesting that attention may be required to either retrieve or analyze the recorded data.

The significance of the green light in this context is twofold: it serves as a prompt for the crew to monitor the memory capacity and ensures the integrity of the recorded data related to operational limits, including any potential over-G incidents, which can affect aircraft performance and safety. Being aware of this status is crucial for maintaining an effective operation within the aircraft's capabilities.