CAN 0.0 0 06 Sep 2011 C 0.00 CAN CAN 0.0 0 06 Sep 2011 C 0.00 ASC Airframe 970902 ASC 90A Auxiliary Power Unit (APU) This revision Enclosure - Thermal Barrier supersedes ASC 090, Installation dated August 30, 2010. and ASC 090 AM1, dated September 10, 2010. No further action is required for operator