As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
F/A'S REPORT L1 DOOR SQUEAL INTERFERING WITH COMMUNICATION. GROUNDED - YES. AIR TURNBACK - DIVERSION TIME 43 MINUTES. REMOVED AND REPLACED L-1 LWR FLAPPER SEAL REF AMM 52-11-00-420-801, PRESSURIZED AIRCRAFT UP TO 6 PSI NO LEAK OR NOISE NOTED.