What was found
SUPPLEMENATL CABIN DEPRESSURIZATION AT FL 340. LOUD WHISTLE FROM MAIN CABIN DOOR. EMERGENCY DESCENT ACCCOMP. HIGHEST CABIN ALT WAS 11800 FT. C/A-C/W MANUAL PRESSURIZATION SYSTEM OPS CHECK SATISFACTORY IAW AMM 21-31-00, FOUND PAX DOOR SEAL DAMAGE AT TOP AFT CORNER REPAIRED AS REQUIRED IAW AMM 52-00-01. REMOVED AND REPLACED MAIN CABIN DOOR SEAL IAW AMM 21-31-00. OP CHECKED GOOD. LEAKED CHECKED GOOD IAW AMM 21-31-00-70-808-A. REMOVED AND REPLACED SERVICE DOOR FRAME SEAL IAW AMM 53-21-11 OPS CHECK GOOD NO LEAKS NOTED. PERFORMED OPERATIONAL CHECK OF MANUAL MODE OF PRESSURIZATION CONTROLLER IAW AMM 21-31-00-700-801-A. OP CHEKED GOOD. AUTOMATIC PRESSURIZATION SYSTEM INOP ITEM DEFERRED PER MEL #21-17M PROCEDUEREC/W AUTH #030111DM-C. REMOVED AND REPLACED ELECTROPNEUMATIC OUTFLOW VALVE IAW AMM 21-31-03 OPS CHECKS GOOD. MEL 21-17 RESTORED. MAINT. ITEMS COMPLIED WITH.