If UAX adds the additional 70 UAX 76 Seaters then UAX would be limited to 125 50 Seaters and 325 70/76 Seaters for a total of 450 UAX aircraft. Kirby's business plan requires more small market spokes on United's numerous hubs. He knows he can't park those 50 Seaters which is why he hasn't added any of the additional 70 76 Seaters.