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Boeing 737 FMC Preflight System
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- Data Link Features
- Data link enables automatic uplinking of preflight information from ground stations
- System status can be monitored through CDU page displays
- FMC communication page allows initiating AOC datalink downlink requests
- Preflight Sequence
- Normal sequence includes identification, position initialization, route, departure, and performance initialization
- Optional features include N1 LIMIT and TAKEOFF REF pages with U10.1+
- Minimum requirements include inertial position, route, and performance data
- Route Entry
- Route segments can be manually entered or loaded from company database
- Company routes automatically include origin, destination, runway, and procedures
- Route segments can include airways, procedures, or DIRECT segments
- Data Management
- Navigation database activation requires manual entry
- Active database can be changed only on ground
- System displays ACTIVE/MOD status for route modifications
- Data link reduces required crew actions during preflight