Boeing reported a slightly smaller loss in the first quarter compared to the same time a year ago, but said fixing the problems that got attention after the Alaska Air incident will push back its financial recovery and cost it $443 million in compensation to its airline customers.

Boeing reported a core operating loss of $388 million, or $1.13 a share, from the $440 million it lost on that basis a year earlier. That was significantly less than analysts’ forecast of $1.63 a share in the quarter. But the improvement came from outside its key commercial airplanes unit, where losses from operations nearly doubled to $1.1 billion.

Revenue tumbled $1.4 billion, or 8% to $16.6 billion, as the problems at the airplane maker resulted in a sharp drop in deliveries of jets to its airline customers. The company gets most of its money from sales of commercial planes only upon deliveries to customers.

The slightly better than expected financial results don’t make up for a company struggling with questions from Congress, regulators and the traveling public about the quality and safety of its aircraft. It is not only scrambling to repair its badly damaged reputation but also to satisfy airline customers being hurt by not receiving the aircraft they had been promised. Boeing said it is taking the necessary steps to fix the quality issues. But those fixes will continue to cause additional losses and missed delivery targets in the months ahead.