Security Pacific National Bank has filed a...

Security Pacific National Bank has filed a $1-billion shelf registration statement with the Securities and Exchange Commission to issue rated, publicly registered residential mortgage-related securities. . . . Stanline Inc., a Norwalk-based distributor of specialty building products, has agreed in principle to be acquired by a U.S. subsidiary of Bunzl PLC, a British firm involved in manufacturing and distribution, in a cash merger . . . Consolidated Rail Corp. will acquire 400 fully enclosed trilevel rail cars, valued at $13.8 million, to meet the transportation service needs of automotive manufacturers . . . San Diego-based Pacific Southwest Airlines, acquired by USAir Group last year, will merge into USAir on April 9.