As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE NR 1 ENGINE GAVE A LOUD BANG AND SPOOLED DOWN SHORTLY AFTER TAKEOFF AT 1800 FEET. THE AIRCRAFT WAS RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. THE NR 1 ENGINE WAS REMOVED AND REPLACED. *S/D* SHOP FINDINGS REVEALED 8TH STAGE STATOR SUPPORT FAILURE.