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Citation X flight crew reported a false over speed and resulting climb during cruise and approach. Flight crew continued to destination.

Date: 2026-02 · Aircraft: Citation X (C750) · Phase: cruise

Anomalies: Aircraft equipment problem criticalDeviation altitude excursion from assigned altitudeDeviation discrepancy procedural clearanceInflight event encounter loss of aircraft control

Synopsis

Citation X flight crew reported a false over speed and resulting climb during cruise and approach. Flight crew continued to destination.

Narrative

During cruise Autopilot engaged; we had a false overspeed and resulting Autopilot pitch up of about 600 feet; also at ZZZ on approach prior to FAF the same issue with a pitchup of 300 feet; neither ATC had made any mention.

Second reporter narrative

At cruise we had false overspeed message; Autopilot disconnected and began a climb of 600 ft. Also on final approach to ZZZ at final approach fix it happened again. Neither controller commented although we reported to both.

Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.

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