Sierra Pattern - A320

The Airbus A320 "Sierra Pattern" is a manual flight training exercise designed to reinforce pitch, thrust, and attitude management by navigating through specific, un-automated altitude and speed changes. Typically used in Jet Familiarization or MCC training, this maneuver builds proficiency in Normal Law, precise flight path control, and scanning. For a detailed breakdown, see this

Scribd document regarding the Pitch and Thrust Table for Sierra Patterns A320 MCC Flight Crew Training Program | PDF - Scribd

The Sierra Pattern is not a specific "mode" like CLB or DES, but a specific geometric path computed by the Flight Management System (FMS). It is used to manage energy and altitude during Confined Area Approaches, Continuous Descent Final Approaches (CDFA) with step-down fixes, or for Noise Abatement procedures. sierra pattern a320

Trap 4: Speed/Mach Transition

Problem: Descending from high speed (Mach 0.78) to low speed (250kts below 10,000ft) exactly at the Sierra point.
Result: The FMS needs extra distance to decelerate. It may insert a secondary Sierra pattern automatically.
Fix: On PERF DES page, manually set SPEED 250/FL100 (or ATC limit) to allow FMS to decelerate before the constraint.

2. When Does the Sierra Pattern Activate?

The pattern activates instantly when the pilot pushes either Thrust Lever from the CL (Climb) or IDLE detent to the TO/GA (Takeoff/Go-Around) detent, provided:

The aircraft is below 2000 feet RA (Radio Altitude) (exact threshold varies by airline SOP).
Flaps are not at 0 (i.e., in landing configuration).

Critical Note: On the A320, pushing the levers to TO/GA does NOT require pressing the takeoff/go-around button on the thrust levers (if equipped). Moving the levers physically into the detent is sufficient. The Airbus A320 "Sierra Pattern" is a manual

Mastering the Sierra Pattern A320: The Gold Standard for Airbus Go-Arounds

In the high-stakes world of commercial aviation, few maneuvers are as mentally demanding as the Go-Around (also known as a Rejected Landing or Balked Landing). For Airbus A320 pilots, one specific procedural framework has risen above the rest to become the industry benchmark for safety and standardization: The Sierra Pattern.

While the term “Sierra Pattern” might sound like classified military jargon or a cryptic line from an aviation manual, it is actually a logical, geometry-based flight path designed to transition an A320 from a low-energy, landing configuration back to a safe altitude for re-entry into the traffic pattern. Trap 4: Speed/Mach Transition

This article dissects the Sierra Pattern for the A320. We will explore why it exists, how to execute it step-by-step, the specific Airbus automation logic you must respect, and why this pattern is critical for modern airline operating procedures (SOPs).