As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED. AFT LEFT OVERWING EXIT ECAM MESSAGE OCCURRED APPROX 6000' AND WENT OUT RETURNED TO PHL AT ABOUT 3000'. THE AIRCRAFT RETURNED TO PHL WHERE IT LANDED SAFELY WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE FOUND HANDLE COVER PROXIMITY SWITCH 21WV1 OUT OF ADJUSTMENT AND ADJUSTED SWITCH, PER AM 52-71-13. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.