An FAA preliminary incident report for 17 November reads as follows: SOUTHWEST AIRLINES FLIGHT 438, A BOEING 737, ON DEPARTURE EXPERIENCED A
VIBRATION IN THE NUMBER TWO ENGINE, ENGINE SUSTAINED UNKNOWN DAMAGE,
AIRCRAFT RETURNED AND LANDED WITHOUT INCIDENT, DALLAS, TX
Suffice it to say that the damage in question is now well and truly 'known'.
A lengthy description of the incident filed by one of the lady flight attendants on board concludes with the words: "There were 2 Fire trucks cop cars and I couldn't tell you how many mechanics and employees standing there in awe of this aircraft. They couldn't believe we made it! This very incident is proof of how awesome our pilots are at Southwest Airlines. I am honored to have had that crew."
Nicely handled, and nicely said.