What was found
DURING B4 CHECK, DISCOVERED CRACK IN FUSELAGE STA 947.5, STRINGER 23R, FORWARD OF THE OUTFLOW VALVE. MAINTENANCE REMOVED DAMAGED AREA AT STA 947.5, STR 23R IAW BOEING 737-300 SRM 53-00-01. FABRICATED DOUBLER IAW BOEING 737-300 SRM 53-00-01. INSTALLED FABRICATED REPAIR PARTS IAW BOEING 737-300 SRM 53-00-01. A MONITOR WAS INSTALLED TO RE-INSPECT 60,000 CYCLES FROM REPAIR INSTALLATION. PART AND CRACK LENGTH INFO UPDATED.