Deciphering EAFR Data: “Maximum Recorded Airspeed” vs. “As Per EAFR”

Why do preliminary aviation reports sometimes distinguish between milestones occurring “as per EAFR” and specific statistics like “maximum recorded airspeed”? In this episode, we analyze the technical nuance behind these terms, using the example of a 180 KIAS peak to illustrate the difference between procedural events (like V1 or Vr) and peak values captured in a data trace. We also dive into the architecture of the 787’s Enhanced Airborne Flight Recorder (EAFR) and the Recorder Independent Power Supply (RIPS), explaining how a recorder can continue operating even if specific inputs—like air data from the ADR—stop updating or become invalid