After delaying the release of its fourth quarter and annual earnings twice, aerospace and defense manufacturer Ducommun Inc. of Carson released its earnings and explained on a conference call Friday that the company had to recalculate and restate certain financial data because of internal errors.

In one case, employees erroneously reported how many hours they had worked on a project between 2009 and the third quarter of 2014, throwing off the company’s financial reports and income tax calculations.

“We are obviously very disappointed,” Chief Executive Anthony Reardon said on Friday’s call. “The misconduct and its related financial impacts were concealed from Ducommun’s senior management, internal auditors and external auditors.”

The company is starting to correct the situation, he added, which includes terminating the employees involved in the issue. An internal investigation found that other programs were affected by the employees’ actions but that customers were not affected, Reardon said. The company did not disclose how many employees had overstated their hours worked.

The company’s long-awaited earnings, released in advance of Friday’s conference call, showed a sharply higher profit for the company.

For the year ended Dec. 31, Ducommun reported net income of $19.9 million ($1.79 a share), up 75 percent from 2013, when it made $11.4 million ($1.05 a share). Revenue climbed less than a percent to $742 million from $737 million in 2013.

Reardon said the company experienced successes from growth in its commercial aerospace segment over the quarter amid a “significant” decline in its military business.