Northrop Corp. reported first-quarter net of $47.2...

Northrop Corp. reported first-quarter net of $47.2 million, or $1 per share, contrasted with a loss of $34.8 million, or 74 cents per share, in the first quarter of 1991.

The return to the black resulted primarily from an increase in pension income and a decrease in interest expense, the Los Angeles-based aerospace firm said.