Summary
This document withdraws a notice of proposed rulemaking (NPRM) that would have applied to all Pilatus Britten-Norman Limited (Britten- Norman) Models BN-2T and BN-2T-4R airplanes. The proposed AD would have required you to revise the Airplane Flight Manual (AFM) to include requirements for activation of the airframe pneumatic deicing boots. The proposed AD was the result of reports of in-flight incidents and an accident (on airplanes other than the referenced Britten-Norman airplanes) that occurred in icing conditions where the airframe pneumatic deicing boots were not activated. Britten-Norman has demonstrated that the language currently included in the AFM is adequate to address the conditions identified in the proposed AD for these airplanes. Therefore, AD action is not necessary to address the conditions on these airplanes and we are withdrawing the NPRM.