As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING, CREW WAS INFORMED THAT A PIECE OF RT TRAILING EDGE FLAP DEPARTED THE ACFT ON ROTATION, VISUAL INSPECTION AFTER PARKING CONFIRMED PART OF FLAP WAS MISSING. FLAP 25 TAKEOFF. R & R OTBD FLAP ASSY IAW AMM 27-51. (8592099) AIRCRAFT WAS GROUNDED.