AMSTERDAM/FRANKFURT - Dutch engineering services firm Imtech said on Monday it was trying to preserve as much of the company as possible after its Germany subsidiary, its largest, filed for insolvency last week. The company, which has suffered from years of losses, writedowns and scandals, issued a profit warning in late July and then entered a phase of acute financial distress last week after announcing its financiers would not extend it further credit. Its German subsidiary filed for insolvency on Thursday. The German unit’s insolvency administrator said he expected to have a clearer picture on the unit’s financial situation within a few days, after his team of about 70 specialists had examined the company’s data. Peter-Alexander Borchardt, of Hamburg-based law firm Reimer, also said in a statement on Monday that Imtech Germany would continue construction work at Berlin’s new airport for the time being, seeking to ease concerns that the insolvency could cause yet another delay to the opening of the airport. Berlin airport had warned on Friday that the insolvency could results in delays, after some of Imtech’s staff at the airport, where the company has been doing work on heating and ventilation systems, did not turn up for work. The airport, originally planned to open in 2012, has been under construction since 2006. Under current plans, construction is due to be completed in March 2016, with the opening scheduled for the second half of 2017.