What was found
RT SIDE STATION 1220 OVERWING INTERCOSTAL WEB WAS FOUND HAVING CRACKS AND NEED TO BE REPLACED IN ACCORDANCE WITH PARAGRAPH 3B, WORK INSTRUCTIONS OF SB-747-53A2750. FOUND 2EA CRACKS ON STA 1220 INTERCOSTAL LOWER CHORD. THE INTERCOSTAL LOWER CHORD WAS REPLACED WITH A NEW PART THAT WAS LOCALLY MANUFACTURED PER DRAWING 65B12368 (-40) REV B AND SRM 51-00-06. THE DEVIATION WAS APPROVED UNDER BOEING SERVICE REQUEST 1-1966232700 ON ODA-300064-NM FAA FORM 8100-9 DATED SEPTEMBER 2, 2011 AS AN ALTERNATIVE METHOD OF COMPLIANCE TO PARAGRAPH (I) OF AD 2010-14-17 AND FOUND TO MEET THE TYPE CERTIFICATE BASIS.