Sierra Pattern A320 May 2026

In Airbus A320 pilot training, Sierra Patterns refer to a specific set of instrument flying exercises designed to improve a pilot's manual handling skills and instrument scan. These patterns are foundational maneuvers often practiced in flight simulators to master precise aircraft control through varying flight phases. Key Characteristics of Sierra Patterns

8. Real-World Precedent: The Gimli Glider (B767) vs. The A320

The most famous unpowered glider event was Air Canada Flight 143 (the Gimli Glider), a Boeing 767. The 767 has a superior glide ratio (12:1) and manual reversion (cable controls). The A320 has no manual reversion. Lose all hydraulics (impossible unless RAT fails), and you lose control. sierra pattern a320

A. Procedure Nomenclature (SID/STAR): In certain airports, procedures may be labeled with the suffix "S" (Sierra). For example, a "DEPARTURE 1S" or "ARRIVAL 1S." In Airbus A320 pilot training, Sierra Patterns refer

The Sierra Pattern allows the pilot to:

1. Geometric Path: The FMS builds a descent path backwards from the runway threshold (or final approach fix) using idle thrust and a default descent speed (e.g., 280kts / Mach 0.78).
2. Constraint Check: If the idle path from cruise passes through 10000 at a point after WPT B (i.e., too high), the FMS cannot meet the constraint with a pure idle descent.
3. Sierra Activation: The FMS inserts a level segment (thrust > idle) starting before WPT B to lose excess energy or time. This segment is computed as:

   Phase 1: The Initial Climb (The "Straight" part of the S)

   • 0–400 feet AGL: Climb straight ahead on the runway heading (270°).
   • Call: "Go-around, Flaps 1" (once positive rate is established).
   • Landing Gear: "Positive climb – Gear Up."
   • Thrust: Set GA thrust, but do not engage any autopilot until you have positive control.