Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Saab Model SAAB 2000 series airplanes. This proposal would require modification and sealing of the firezone compartment of the nacelle of the left and right engines. This proposal is prompted by reports indicating that firezone compartments have not been completely sealed. The actions specified by the proposed AD are intended to prevent flame, fuel, and vapor from entering compartments behind the firezone compartment. This condition, if not corrected, and if combined with a fire source in the firezone compartment, could result in an uncontrollable fire outside the firezone compartment.