As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOUD SQUEAL FROM L1 DOOR STARTED ON DES AT DP 7.9 AND STOPPED AT DP 6.4-PERFORMED OPS TEST OF CABIN PRESSUERIZATION IAW AMM 21-31-00. FOUND L1 DOOR MEGAPHONE MALFUNCTION. R/R L1 DOOR MEGAPHONE IAW CMM 25-64-00. OPS CHECK GOOD. NO DEFECTS NOTED. A/C OK FOR SVCD