As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FLIGHT RETURNED TO PHL ON ACCOUNT OF LEADING EDGE, FLAP AND SLAT DISAGREE. EMERGENCY WAS DECLARED. MAINTENANCE ACCOMPLISHED FIM TASK 27-51-00-815-811 AND 809, REPLACED FLAP POSITION TRANSMITTER #1 M473 IAW AMM 27-51-45 AND THE LEFT FLAP/STABILIZER POSITION MODULE IAW AMM 27-58-01. OPS CHECK GOOD. (SEE SDR # AALA201912049038)