Install a privacy partition and a non-belted toilet in aft cabin.

Installation of vortex generators on the wings and tail surfaces and strakes on the engine nacelles.

Installation of Hartzell propeller de-ice components.

Installation of Raisbeck/Hartzell Quiet Turbofan Propellers or Swept Blade Turbofan Propellers, and optional Increased Gross Weight

Installation of various propeller electrical de-icer models

Installation of fully enclosed main landing gear door system and associated actuation mechanism per Raisbeck Engineering Drawing List 84-1004, dated July 9, 1984, or later FAA approved revision. This modification must be maintained in accordance with Raisbeck Engineering Document No. 85-120 issued January 1990, or later FAA-accepted revision.

Installation of Electronics Int'l digital automatic engine analyzer.

Installation of a right-hand forward lavatory and toilet.

Installation of modified ram air engine induction system (Option I or Option II).

Installation of the Pratt & Whitney Engine Services ADASd