What was found
DURING X-RAY INSPECTION OF THE AFT PRESS BULKHEAD VENTRAL STAIR DOOR FRAME, A 1.375 IN CRACK WAS DISCOVERED AT THE UPPER LEFT CORNER. EVAULATED CRACK AS DESCRIBED PER SB53-137R4 PG 19 GROUP 22 COND 4. THE AIRCRAFT IS OK FOR CONTINUED SERVICE PER SB53-137R4 PAGE NR 48. VISUAL AND X-RAY INSPECTION OF THE UPPER CORNERS IS COMPLIED AT INTERVALS NOT TO EXCEED 500 LANDINGS PER PARAGRAPH 2A OF SB 53-137R4. THIS ITEM TRANSFERRED TO CARRY OVER ITEM NR 5A-53-005, PER REPAIR. (M)