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.

Beech 125-560015-1 Master Oxygen Valve Assembly installation.

Install seat belt and shoulder harness.

Install slip resistant paint surfaces

Installation of passenger chairs.

Installation of polarized window screens.

Install cabin and cockpit upholstery.

Installation of soundproofing.

Installation interior and exterior paint and markings.

Cabin Lighting and Cabin Electrical Accessories installation.