Disagreements over the terms of a new Federal Aviation Administration bill are partly to blame for the need for yet another short-term FAA authorization measure, which Congress is expected to pass this week.

House and Senate lawmakers will take up a bill authorizing the FAA for six months. The legislation is considered a patch, and it will likely exclude much-needed reforms to improve airline safety and boost consumer protections. Those reform provisions are part of stalled long-term bills authored separately in the House and Senate.