What was found
AFT PIT, BS 1400 BUTT SPLICE STRAP IS CORRODED BTWN STR 27L-STR 28L. MAJOR REPAIR ACCOMPLISHED: REMOVED DAMAGED SECTION OF BUTT SPLICE STRAP, (CIRCUMFERENTIAL SKIN SPLICE), AND FABRICATED AND INSTALLED A DOUBLER AND FILLER REPAIR PER PEMCO EA PD57-53 -064 AND UAL EVA 80344 ON NON ROUTINE 2358N00239. PER UAL EVA 80344, A NEW FAA 8100-9 MUST BE ISSUED AND DTA INCORPORATED INTO THE AIRPLANE 085625 MAINTENANCE PROGRAM WITHIN 24 MONTHS FROM 23NOV10. THE AIRPLANE WILL BECOME UNAIRWORTHY UNLESS A NEW FAA 8100-9 IS ISSUED ON OR BEFORE 23NOV12, REF EG DTA LOG 10-123.