National Transportation Safety Board via AP
- Alaska Airlines said it will return its first few 737 Max 9 jets to service on Friday.
- United will also bring the Boeing plane back to service from Sunday.
- Not all the planes will immediately return to the skies as more inspections are pending.
The Boeing 737 Max 9 will return to the skies on Friday, three weeks after the Alaska Airlines blowout, the carrier announced Wednesday.