This checklist guides aviation technicians through a rapid, structured response to an Instrument Landing System unscheduled outage. It covers site arrival checks, antenna array inspection for interference or damage, fault diagnostics using the system console, and collection of log data and setup files. Teams document initial evidence, analyze likely causes, and record corrective actions to restore continuity of service. Use it to standardize response, improve reporting, and support safe, timely recovery of ILS operations.
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