What was found
LH WING LEADING EDGE UPPER SURFACE AT SLAT #4 LOCATION, HAS 1 CRACK. DOT 28-38. MADE A REPLACEMENT SKIN FROM 2024-T3 CLAD SHEET, 0.100''. PER E.A. #: 757-5741-27-A3790 PRELIMINARY 1, STEP 8. P/N: 2024-T3 .100C, BATCH: 0004322815. INSTALLED FASTENERS CODE A, B AND D WHERE APPROPIATE. REFER CIRCLE NOTE 19 OF FIG 2 REPAIR SKETCH, PER E.A. #: 757-5741-27-A3790 PRELIMINARY 1, STEP 19. VERIFIED, E.A # 757-5741-27-A3790 STEP 34: CHECK FOR PROPER CLEARANCE BETWEEN THE INSTALLED RAPAIR PANEL AND SLAT. RE-RIG SLAT AS NECESSARY TO MAINTAIN PROPER CLEARANCE. REFER TO 757 AMM 27-81-00. ACCOMPLISH THE PERMANENT REPAIR PER VT-MAE 757-5741-27-A3790, REV.- PRIOR TO FURTHER FLIGHT.