Southwest “Winglets” Case Expected Future Cash Flow of Blended Winglet Project The cash flow estimations for this project were based on assumptions gleaned from our engineering department, flight operations department, and facilities department. From our initial investment data, we assumed a winglet cost of $700,000 per aircraft, installation of $56,000 per aircraft, and an additional day of downtime for each aircraft at $5,000 per day. The total value of the winglet installation per aircraft…
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