United Airlines Boeing 787 Dreamliner

A senior Boeing engineer said Wednesday the plane maker has "extreme confidence" in the 787 Dreamliner, despite three of mishaps this week, including a battery fire.

"Clearly there are issues that … we have to work through," Mike Sinnett, vice president and chief project engineer for the Boeing 787, told reporters. "And just like any new airplane program, we work through those issues and we move on. So while we're happy with the level of the performance of the airplane, we're not satisfied until our reliability and our performance is 100 percent."