Thank you for the question.
Following the Lion Air crash that took place on October 29, 2018, we were examining that accident with the state of design, the FAA. The FAA issued their measure on November 7. They issued an AD, an airworthiness directive, which was adopted by Canada as well as globally.
On November 8, 10 days after the accident, we issued our own changes, in working with the three Canadian operators, to the quick reference handbook, and to ensure that our aircrews were memorizing the full five-step procedure to address the runaway trim stabilizer condition. Those were the additional measures Canada put in place, on top of what was adopted globally as issued by the FAA. Our measures were additional. Those were implemented within two weeks after the accident.