This is correct, but there is a trap. Starting the APU draws massive current from the emergency batteries. If you attempt an APU start while also cycling the engine master switches for a windmill restart, you can drain the batteries below 20 volts. At that point, the FADECs and the flight control computers (ELAC/SEC) reboot or fail.
The aircraft approaches the terminal environment in a "clean" configuration (flaps and slats retracted) at a managed speed, typically around 250 knots below 10,000 feet, slowing down to green dot speed as it nears the approach transition.
In practical simulator training, the "S" refers to the flight path trajectory on the Navigation Display (ND). It looks like you take off, drift right, then turn left to re-enter downwind. sierra pattern a320
At a predetermined altitude, the pilot executes a missed-approach-style recovery or a standard climb profile. Thrust is increased to a specific climb target (e.g., 80% N1 or MCT/TOGA if simulating an emergency), and the nose is pitched up. Phase 4: Gear Deployment and High-Drag Profiles
Airline standard operating procedures (SOPs) mandate that an aircraft must be fully stabilized by 500 feet above ground level (AGL) in visual conditions. This means the aircraft must be: On the correct flight path. In the final landing configuration. VAPPcap V sub cap A cap P cap P end-sub (-5 knots to +10 knots). Operating at a steady engine spool-up state. This is correct, but there is a trap
A vertical speed of 700 to 900 feet per minute is typically maintained to match a standard 3-degree glideslope equivalent by the time the wings level on short final. Challenges and Safety Considerations The "Behind the Aircraft" Risk
The pattern begins with the A320 entering the airfield environment at a higher altitude and airspeed than a standard civilian traffic pattern. The aircraft flies directly over the runway centerline at roughly 1,500 to 2,000 feet Above Ground Level (AGL), maintaining a clean aerodynamic configuration. 2. The Downwind Leg (The "Sierra" Phase) At that point, the FADECs and the flight
"Sierra pattern" is not a standardized A320-specific term; it is context-dependent and usually refers to an S-shaped flight path, an operator nickname for a procedure, a maintenance diagnostic label, or simply the phonetic for waypoint identification. Determine the origin, verify navigation/maintenance data, standardize terminology, and follow normal safety and procedural checks.
For A320 pilots, these patterns are part of a larger curriculum that includes:
: Learning that at a certain weight and speed (e.g., 210 knots with Flaps 1), the A320 requires roughly 5.5∘5.5 raised to the composed with power of pitch and thrust to stay level.
You cannot restart. You glide down to 10,000 feet, and using the remaining Blue hydraulics, you perform a "Sierra Ditching" procedure. You aim for flat water, 10° nose-up, landing gear up. The A320 has a ditching rating of "survivable." (Notable: US Airways 1549 was not a dual-engine failure at altitude; it was a bird strike at low altitude. The Sierra Pattern doesn't apply there.)