What was found
CRACK ON FUSELAGE SKIN ON BS 1474 ON LONGERON 21 TO 22L. HOLES WERE STOP DRILLED AND REPAIR DOUBLER WAS FABRICATED, TREATED AND PAINTED AND INSTALLED IAW SRM 53-01, FIG 2, 51-10-3, P 14 AND 21 AND 51-30-2. HFEC WAS PERFORMED IAW NDT SPM 06-10-01.001.