===Citation II/SP===Like the Citation I/SP, the Model 551 Citation II/SP was launched as Cessna's means of competing in the turboprop market, which predominantly are operated single-pilot, so the aircraft was re-certified for single-pilot operations.
=== Cessna 551 Citation II/SP ===Как Cessna 501 Citation I/SP, модель Cessna 551 Citation II/SP была средством конкуренции на рынке турбовентиляторных самолётов, которыми управляет один пилот.