IN THE AD. HENCE AD IS N/A BY THE EFFECTIVITY LIST. EARLIEST E/C: 2001-14-20 Category: AD Status: N/A Rev: 1 WINGS CENTER WING BOX FLOOR BEAM INSP & MOD REP Reason Freq: 1 NOT AFFECTED TO NC MODEL B737-600...-900 EARLIEST E/C: 2001.15.01 39-12335 Category: AD Status: N/A Rev: 2 737-25-1403 737