In a joint statement on Thursday, Transportation Secretary Ray LaHood and FAA Administrator Michael Huerta reiterated that they are determined to fix the problem.

"Based on what information our experts find, the FAA will take any action necessary to further ensure safety. We must finish this work before reaching conclusions about what changes or improvements the FAA should make going forward," the statement read.

"The FAA is focused on the review and activities to understand the root cause. Once the review is complete, the FAA will make any analysis and conclusions public."

Boeing said it has hundreds of experts focused on solving the battery situation. "We are working this issue tirelessly in cooperation with our customers and the appropriate regulatory and investigative authorities."