NEW YORK (CNN) - Struggling to shore up its finances and cut costs, Delta Air Lines announced plans to raise as much as $500 million through a securities offering, while detailing plans to cut maintenance costs.

In an SEC filing Monday, Delta outlined plans to register to sell a combination of debt and equity totaling $500 million.

Delta (Research) says it plans to use the proceeds for general purposes, including funding operations and paying down debt.

Separately, in a memo to Delta Air Lines staff, which was included in an SEC filing Tuesday, Senior Vice President of Technical Operations Tony Charaf said Delta will partner with Avborne of Miami and Air Canada Technical Services of Vancouver to conduct work on its MD-88, MD-90, 757 and 767 fleets.

Delta also plans to concentrate or shift additional work to Atlanta, where it is based. The moves will cut maintenance costs by 34 percent, or $240 million over five years, according to Charaf.

The technical operations division is slated to lose 1,600 to 2,000 jobs out of a total 6,000 to 7,000 cuts announced by Delta. Charaf did not say when those jobs will be cut, although both sets of numbers were previously announced as part of Delta's transformation plan as the nation's third-largest carrier in terms of revenue tries to stave off bankruptcy.

Delta reported a loss of $5.2 billion in 2004.

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-- By Caleb Silver - Assignment Manager CNN Business News