The “Airworthiness Limitations” Chapter 4 has been revised for the 200 & 300 series King Air Models. “Installation of tail access panels”. The SB for the tail panel kit has been out since 2008. The kit installation must be complied with prior to May 1, 2012. The only exception are the B300 serial number FL-321 through FL-499, and FM-11 through FM-13 must complete their initial inspection on or before November 1, 2012 .Kits are in short supply from HBC at this time.
Butterfield Industries has announced they will be producing the panels under a PMA and should have kits available by the March 2012 time frame.