What was found
MCN - DURING C16 CHECK DISCOVERED INTERCOSTAL CRACKED, 1.5 INCHES, AT BS 347 ABOVE THE E-2 SHELF, BL 11.1 AND WL 207. MAINTENANCE REMOVED AND INSTALLED FABRICATED INTERCOSTAL FROM BS 344 TO BS 360, BL 11.10L AND WL 207 IAW AMERICA WEST AIRLINES ENGINEERING REPAIR NO 03-5310-05355-ES1.