🎬 BOEING B737 MAX ATA 00 External walk around and differences from B737. ✈️

[@AVIATIONSOUNDEXPERT]

Hello, 1) Recently I saw a message on the Nav Display and PFD of a 787-9. The message was "SURF" in amber color. Do you know what it means? Never saw that before. 2) What does the TCAS status, "TFC-ALL" on the Nav Display mean? I know that you have TCAS Normal, Below and Above scan. In my example, even when the pilots selected Below, the information TFC-ALL remained. Do you know the answer? Thanks.