Auto Flight - Garmin GFC 500 Autopilot System - Software Update
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- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected airplanes must update the Garmin GFC 500 Autopilot System software within 12 months of the effective date, August 20, 2024. They must not install prohibited earlier software versions after this date. Compliance can be achieved by following Garmin Mandatory STC Service Bulletin 22123, Rev A, or installing any approved later software versions.
Summary
The Federal Aviation Administration's Airworthiness Directive 2024-14-03 addresses various airplanes equipped with the Garmin GFC 500 Autopilot System installed under Supplemental Type Certificate No. SA01866WI. This directive mandates a software update to the Garmin GFC 500 Autopilot System to prevent un-commanded automatic pitch trim runaway events. The affected aircraft include all models specified in the directive that have the optional GSA 28 pitch trim servo installed.
What changed
This new airworthiness directive introduces a mandatory update to the Garmin GFC 500 Autopilot System software, prohibiting the installation of earlier software versions (8.01 or earlier for G5, 9.01 or earlier for G3X Touch, and 2.59 or earlier for GI 275). It also revises applicability by removing and adding certain airplane models and clarifies handling of hardware failures related to the primary pitch servo.
Why it matters
This directive is critical for aviation professionals because it addresses a safety risk involving un-commanded pitch trim runaway, which could lead to loss of airplane control. Operators and maintenance teams must ensure compliance to maintain airworthiness and prevent potential accidents. The update also affects software installation practices, requiring vigilance to avoid installing outdated versions.
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