The use of Hand-held fire extinguishers containing Halon in Aircraft will become prohibited end of 2025 and you will need to replace all them.

Installation of a heated windshield panel

Installation of Whelen Anti-Collision Strobe Light Systems, Part Number 01-0770006-( ), 01-0770028-( ), 01-0770029-( ), 01-0770062-( ), 01-0770900-( ), and 01-0771055-( ), as replacement for originally installed anti-collision lights.

Installation of emergency medical stretcher, oxygen, and electrical systems.

Installation of vortex generator system on the wing and vertical stabilizer of these aircraft

Installation of FiQuench cabin and/or engine fire extinguishant system.

Install openable window aft of cabin door.

Reduce height of existing survival seat.

Installation of MASS Systems Fire Extinguisher Cartridge asreplacement for Walter Kidde Aerospace fire extinguisher cartridges in fire extinguisher bottles installed in the airplane models noted on the EASA approved model list dtd 02 April 2008 (which excludes aircraft models not validated by EASA)... EASA.IM.A.S.01853 FAA STC ST00961LA

Installation of Airwolf remote mounted engine oil filter kit AFC-K008 on single and multi engine fixed wing light aircraft incorporating Teledyne Continental reciprocating engines of 450 horsepower or less.