What was found
WHILE PERFORMING (TASK CARD-52-900-908 VENT FLAP/ICE BREAK CABLE INSPECTION OF THE MAIN PASSENGER DOOR) FOUND FRAME, BS 320 TO HAVE LARGE PATCH OF CORROSION WHILE LOOKING AT VENT FLAP. UPON INVESTIGATION FOUND FRAME AND DD4 INTERCOSTAL TO HAVE WIDESPREAD CORROSION AND IS OUT OF LIMITS DUE TO NO ALLOWABLE DAMAGE LIMITS IN THE SRM. REMOVED UNSERVICEABLE PAX DOOR FRAME IAW SRM 51-42-06-001-001-A01, & 51-42-21-001-001-A01. NEW FRAME LOCATED AND DRILLED IAW SRM 51-40-11-001-001-A01. INSTALLED THE FRAME IAW SRM 51-42-06-001-001-A01, AND 51-42-21-001-001-A01.