PDA Engineering, Costa Mesa, said earnings for...

PDA Engineering, Costa Mesa, said earnings for its third quarter ended March 31 totaled $504,000, up 15% from the $439,000 posted for the same period a year ago. Revenue rose 24% to $7.8 million from $6.3 million. For the 9-month period, earnings increased 21% to $1.2 million from $995,000 a year earlier. Revenue jumped 14% to $20 million from $17.5 million. PDA Engineering designs and develops mechanical engineering software and provides products and specialized engineering services.