The Sierra Pattern is a structured flight maneuver used primarily in A320 simulator training to build a pilot's "pitch and thrust" memory. It consists of a series of constant-speed climbs and descents designed to test a pilot's ability to manage the aircraft manually, without the help of the autopilot or flight directors. How to Fly the S-1 Pattern

The moment a pilot decides to go around (due to unstable approach, obstacle on runway, wind shear, or ATC instruction), the Pilot Flying (PF) calls "GO-AROUND, FLAPS" and performs: