. serial numbers 5001 and sub, on which GAC Mod ASC-904 or production equivalent has been incorp. AD 992604 AD 2006-11-03 Insp Aileron 8 All GV NC, G500 & 27 MAN N/A 0.0 0 26 Nov 2007 C 0.00 Aidrame Elevator Act. Assy. G550 NC Snits 5001. 5052. Due within 500 hrs after the Eff. date