What was found
DURING "A" CHECK MX FOUND 2 RIVETS WITH MISSING HEADS FWD OF THE LAVATORY SERVICE DOOR. INSPECTION FOUND CABIN AIR OUTFLOW VALVE DOUBLER (PLATE) CORRODED BEYOND LIMITS AT STA. 786, LONG. 23L. MX INSTALLED A NEW DOUBLER (PLATE) AT STA 786, LONG. 23L IAW THE SRM 51-30-2. THIS INCLUDED THE REPLACEMENT OF THE 2 RIVETS THAT WERE MISSING. THE ACFT WAS RETURNED TO SERVICE. REFERENCE SRM 53-30-0, PAGE 11, ITEM 30 AND SRM 53-30-0, PAGE 14, ITEM 30.