What does computer generated AFM indicate in performance charts?

• A. 1098
• B. Manual input
• C. Altitude correction
• D. Altitude charts

Answer: (A)

Understanding how performance figures are sourced is key. When performance charts show a computer-generated AFM, it means the numbers come from the Airplane Flight Manual data stored in the aircraft’s systems rather than being manually entered. The 1098 is the revision or data-set identifier for that AFM edition being used by the charts, so you know you’re looking at the official, current performance data for that aircraft configuration. This matters because AFM revisions can change performance values, so the charts reflect the correct figures only if they’re tied to the proper AFM revision. The other options don’t describe the data origin: manual input would imply numbers entered by hand, altitude correction is a specific adjustment, and altitude charts are simply a type of chart, not a data-source indicator.