There are two FMGC (Flight Management Guidance Computers) on board. Each FMGC computes its own aircraft position (called the “FM position”). To grasp the method of position calculation in the A320, it’s crucial to first comprehend three key terms individually. Once these concepts are clear, connecting them becomes much simpler. In this article, we aim…
Issue When altering the Vapp entry or adjusting altitude constraints, the Flight Plan (F-PLN) profile undergoes a re-computation. If the Required Time of Arrival (RTA) function had been utilized prior to these modifications, the MCDU and PFD may unexpectedly present inaccurate speed targets. In addition, this scenario could occur if the flight crew has initially…
Issue On the Airbus A320, the “CHECK WEIGHT” message appears on MCDU when there’s a significant disagreement between the gross weight computed by FMGC and the gross weight computed by FAC. This could indicate a potential discrepancy in the aircraft’s weight calculations, which is crucial for safe flight operations. The threshold for triggering this message is…
In normal law speed scale displays VLS, V Alpha prot and V Alpha max speed. In alternate and direct law speed scale is same. It displays VLS and Vsw only. VLS Speed: VLS is the lowest selectable speed for the autopilot and autothrust. It’s represented by the top of an amber strip along the airspeed…
It is common practice to start both engines of an Airbus A320 during pushback, provided that the ground handling equipment and procedures at the specific airport allow for it. Starting both engines during pushback helps to streamline the process and allows the aircraft to begin taxiing immediately after pushback is completed. However, as mentioned earlier,…
Issue: As the wording suggests, the condition arises when ‘G/S’ is displayed as armed on the FMA despite not being expected. This issue occurs when the following conditions are satisfied within a timeframe of less than 1.5 seconds: AP 1+2 set to OFF FD 1+2 set to OFF A/THR set to OFF. Here, although AP/FDs…
Issue: This problem typically occurs when the aircraft encounters certain conditions, such as an unusual position of the LOC ground antenna or when the LOC course isn’t properly aligned with the runway axis. In these situations, the aircraft may oscillate on one side of the LOC axis, potentially leading to unstable flight or difficulty in…
Maximum climb thrust being less than maximum continuous thrust for some airliners is due to several reasons: Runway Length and Weight Limitations: Aircraft need to accelerate to takeoff speed within a limited runway length. At or near maximum takeoff weight, this distance could be significant. In cases where the runway is short, the aircraft may…
As the temperature stops decreasing at the tropopause, aircraft performance sees a favorable turn. Staying below this threshold becomes advantageous, particularly for aircraft like the A320, tailored for short to medium flights. Entering the tropopause in the MCDU is essential for adjusting the Flight Management and Guidance Computer (FMGC) temperature model to accommodate non-standard temperatures.…
“The Airbus A320, a widely used narrow-body, twin-engine airliner, is offered in two primary variants: the A320ceo (Current Engine Option) and the A320neo (New Engine Option). Here’s a detailed explanation of the differences between the two: A320ceo vs A320 neo – Engines A320ceo: The A320ceo is powered by either CFM International CFM56 engines or International…