EXHIBIT 11.1 ROHR, INC. AND SUBSIDIARIES --------------------------- CALCULATION OF PRIMARY NET INCOME PER SHARE ------------------------------------------- OF COMMON STOCK --------------- (IN THOUSANDS EXCEPT FOR PER SHARE DATA) ---------------------------------------- FIRST QUARTER ENDED ------------------- NOV. 2, NOV. 3, 1997 1996 -------- -------- Net income applicable to primary earnings per common share $14,867 $ 6,787 ======= ======= Common stock and common stock equivalents: Average shares of common stock outstanding during the period 25,469 22,500 Net effect of common stock equivalents (principally stock options and warrants) 1,399 934 ------- ------- Total common stock and common stock equivalents 26,868 23,434 ======= ======= Primary net income per average share of common stock $ 0.55 $ 0.29 ======= ======= 13