More info to add to this.
AIR-AP1142N-A-K9 Hardware Version of v06 works with firmware 15.2.
AIR-AP1142N-A-K9 Hardware Version v05 does not work with firmware 15.2, but will when downgraded to firmware 12.4.
I'm also having this issue with Cisco Aironet 3602 Fw 15.2(2)JB and 3502 Fw 15.2(2)JB$ that's on a Cisco 2500 WLAN Controller Sw Ver. 7.4.100.0.
Any help on this would be greatly appreciated