There are two types of Boeing 763 seating maps, according to SeatGuru. The two-class version has 44 rows between business and economy class seating. The three-class version has only 39 rows split between global first class, business first class and economy seating.
United Airlines' three-class Boeing 763 provides six open suites with 180-degree recliners, 26 BusinessFirst-class flat bed seats with 180-degree recliners, 71 economy plus seats and 80 economy seats in its 39 rows of seating. American Airlines' two-class Boeing 763 provides 30 business class angled-flat seats, 21 main cabin seats and 167 economy seats in its 44 rows of available seating.