Sierra Pattern A320 -

: Training for scenarios where automated systems might fail, requiring the pilot to fly by hand using basic instruments.

| Scenario | Why Sierra? | Example | | :--- | :--- | :--- | | | Keep aircraft high and slow over populated areas before a steep descent into a valley airport. | KASE (Aspen): Sierra at DODGE at 15,000ft before dropping into Roaring Fork Valley. | | ATC Flow / Sequencing | Absorb time and lateral distance without descending into lower airspace occupied by departures. | Arrival into LHR or JFK: Level segment at 8,000ft for 15 NM. | | Step-Down Approach (VOR/NDB) | Precisely meet a step-down fix altitude while managing speed for flap extension. | VOR/DME approach: Sierra at FAF altitude before final glidepath. | | Engine Anti-Ice / Performance | Avoid prolonged idle descent (which can cool engines too much). Level segment warms engines. | Icing conditions (TAT < 10°C). | sierra pattern a320

: Executing precise altitude changes (often +/- 1,000 to 2,000 feet) using manual thrust control rather than the Autothrust (A/THR) . : Training for scenarios where automated systems might

You must reach your target altitude and your target heading at the exact same moment. 3. The Descent and Reverse Turn | KASE (Aspen): Sierra at DODGE at 15,000ft