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 cockpit and general cabin arrangement and furnishings.
Passenger seating capacity increased to 44.
Installation of a cabin heater exhaust system
Installation of Teledyne Avionic angle of attack indicating system P/N112-9500.
Interior changes in passenger and jump seats.
Replace passenger interior with class E cargo interior.