ion Mark Aircraft Model: Gulfstream GIV Aircraft Serial Number: 1085 Reference Gulfstream PSI Work Order: SC11231 06/06/2012 Oate Complied with STC ST00544LA • Installation of Concorde Battery sealed lead•acid Battery Model No. RG-380E144 IAW STC ST00544LA and steps II A 2 & 3 of Concorde Battery Corporation Master Dwg.