> In the fiscal year that ended Sept. 30, there were 503 air traffic control lapses that the F.A.A. preliminarily categorized as “significant,” 65 percent more

> In the fiscal year that ended Sept. 30, there were 503 air traffic control lapses that the F.A.A. preliminarily categorized as “significant,” 65 percent more than in the prior year, according to internal agency reports reviewed by The Times. During that period, air traffic increased about 4 percent.