Internal Government Docs Raise New Questions About Approval of 737 Max

Boeing 737 Max jets sit parked in Renton, Wash., on Dec. 16, 2019. Internal government documents about the Boeing 737 Max are raising new questions about Canada's aircraft approval process. The Canadian Press/AP, Elaine Thompson

OTTAWA—Internal government documents about the Boeing 737 Max are raising new questions about Canada’s aircraft approval process.

The documents, made public at a parliamentary hearing Thursday, reveal that Transport Canada test pilots voiced concerns about a key flight−control system going back more than three years before system flaws led to worldwide grounding of the plane.