Modified nose, gear doors, nacelle fairings, and wing tips.

Installation of vortex generators on the wing leading edge, underside of the horizontal stabilizer, and on the vertical fin in accordance with Micro AeroDynamics Drawing List MA2117, Revision IR, dated July 14, 1999, and Installation Instructions MA2118, Revision IR, dated September 21, 1999, or later FAA approved revisions to either of these documents.NOTE: If more than five vortex generators are damaged or missing, the aircraft is not airworthy

Fiberglass landing gear doors.

Addition of Hydro Seal Fluid Additive to landing gear shock struts.

Landing gear wheel well doors.

PA-23-250 wing root and nacelle fairings.

Reinforcement of floor structure between fuselage station 91-1/2 and 123-3/4 and provision for tie-down facilities.

Airspeed indicator landing gear warning system.

Forward fuselage section and long nose 30542-02.