[Tom Tetroxide]

Pilot Flying? That is known as the PIC - Pilot In Command.

[Ex-Con777]

No it is not. There is a Pilot-in-Command and a First Officer. One of them is the Flying Pilot and the other is the Monitoring Pilot.

Because the clickbait grabbing headline blames Boeing, it raises a question in my mind about the “qualifications” of the First Officer.

EC

[Regulator]

So you’re telling me that under Part 121, the FO can take the controls of the airplane and he’s now the PIC and can overrule the CPT (Captain) as to the operation of the aircraft?

[Paal Gulli]

"Pilot Flying? That is known as the PIC - Pilot In Command."

Pilot Flying and PIC are completely different. The PIC is always the captain but the PIC and the First Officer (who customarily are paired for a calendar month) swap flying duties on alternating legs. Whichever's turn it is to fly is the pilot flying. The other in the pilot monitoring or sometimes non-flying pilot.