Labor shortage and supply-chain pressures also forced the company to cut its annual outlook for adjusted operating income growth to mid-20% from mid-30%.
U.S. aerospace companies including Boeing Co have struggled with their defense businesses, partly due to fixed-price contracts, even as their commercial aviation business benefited from a rebound in travel demand.
CAE said its operating profit fell mainly from unfavorable contract profit adjustments of C$28.9 million ($22.62 million) related to a L3Harris Technologies' Military Training classified U.S. program and a CAE U.S. training program.
It posted first-quarter earnings per share without government aid of 6 cents, missing the average analyst estimate of 23 cents. Quarterly revenue of C$933.3 million also missed expectations of C$936.4 million.
U.S.-listed shares of CAE were trading lower at $22.7, while the company's Canada shares were down 12.7% at C428.7.
($1 = 1.2779 Canadian dollars)
(Reporting by Kannaki Deka in Bengaluru; Editing by Arun Koyyur)