What was found
MCN - C21 CHECK - CRACKS ON FUSELAGE SKIN FASTENER HOLES BETWEEN BS 500B + 13 INCHES TO BS 500B + 15 INCHES, STR 4L. REPAIRED FUSELAGE SKIN BETWEEN BS 500B + 13 INCHES TO BS 500B + 15 INCHES, STR 4L IAW B737-300 SRM 53-00-01, FIG 201, REPAIR 30.