e-installed the PATS, Inc. FAA/PMA approved PiN 43206-9 Accessory Cooling Louver and attaching hardware onto the 1159B21419-79 panel. Attachment of the Accessory Cooling Louver is detailed in the above referenced STC SA 1 1INE and was accomplished with 5 each NAS1103-3 bolts; 5 each AN960CI0L washers; 5 each MS21059.13 nui