Hello,
There is ap7161 image included in (latest) 5.9.2.1-009R and suitable for whole 71xx platform portfolio. Including ap7131. I was discovered that 71xx platform perfectly support even latest locationing features while running relevant 5.9.x....
Hello, Please check 7502 image available on controller with "show device-upgrade versions". In case it missing - find appropriate ap7502-5.8.6.x-0xxR.img on portal than upload it to controller with "device-upgrade load-image ...". Check flash space...