WASHINGTON—The head of the Federal Aviation Administration said Thursday the agency needs a “systemic fix” from Boeing to address 787 Dreamliner production issues but said a new agency directive would not be a “choke point” for deliveries. The FAA on Tuesday said it would not allow Boeing to self-certify individual new Boeing 787 planes. Outgoing FAA Administrator Steve Dickson told a small group of reporters on the sidelines of an event Thursday that the agency needs from Boeing “a systemic fix to their production processes. They’ve got to produce the quality on their production line that we’re looking for and that they’ve committed to.” The FAA said Tuesday it will retain the authority to issue airworthiness certificates until it is confident “Boeing’s quality control and manufacturing processes consistently produce 787s that meet FAA design standards.” Boeing did not immediately comment. Dickson said retaining certification authority “will increase the confidence we …