As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: L1 DOOR MAKING SO MUCH NOISE, UNBEARABLE TO EVERYONE IN THE CABIN. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT CLT. FOUND CUT IN FORWARD DOOR PRESSURE SEAL AT AFT UPPER CORNER NEAR FLAPPER DOOR HINGE AREA. ACCOMPLISHED REPAIR TO PRESSURE SEAL, PER AMM 52-09-10. LEAK CHECK GOOD, PER AMM 05-51-91.