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Technical Report: Flight TP1240 Flight Profile Analysis (Prague, January 17, 2026)
The incident involving flight TAP 1240, operated by an Airbus A320neo (registration CS-TVG), occurred on January 17, 2026, during its approach to Prague Airport. Although the event was immediately classified as a serious incident, public reports only surfaced in mid-February 2026, coinciding with the formal commencement of the technical data analysis by the Czech investigative authority (UZPLN).
Trajectory and Descent Path Analysis
According to preliminary findings, the aircraft exhibited a significant deviation from the standard vertical profile during the phase preceding the interception of the ILS (Instrument Landing System).
- Flight Parameters: At a distance of approximately 16 nautical miles (30 km) from the runway, the aircraft initiated a descent with a rate of approximately 3,100 feet per minute, reaching a minimum altitude of about 1,000 feet (300 meters) above ground level. At that point, the aircraft had not yet stabilized on the physical Glideslope radio signal and was operating under the navigation managed by the on-board flight computers.
- System Response: The descent was interrupted following the activation of the EGPWS (Enhanced Ground Proximity Warning System) alert, which generated the "PULL UP" voice command based on radio altimeter data. The crew promptly responded with an emergency go-around maneuver (TOGA).
Branches of the Technical Investigation
Authorities are currently working on several investigative branches to determine the origin of the unintended descent:
- GPS Interference Hypothesis: One branch of the investigation is evaluating the impact of possible satellite signal disturbances (Jamming/Spoofing). Given the frequency of such phenomena in the Central European area also highlighted by EASA safety bulletins investigators are verifying if degraded position data may have influenced the flight computer's calculations during the RNAV approach phase.
- Human-Machine Interface: The investigation is analyzing the management of autopilot modes and potential "Automation Surprise," verifying whether the indications provided by the Flight Director were consistent with the aircraft's actual position under low visibility conditions (fog).
- System Integrity: Standard checks are being conducted on the synchronization between barometric data and inertial platforms to rule out hardware malfunctions in the altitude sensors.
The technical investigation is currently ongoing to fully clarify the hierarchy of events that led to the deviation from the safety profile. Once the authorities conclude their analysis, we will report the definitive official data.
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