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.

In this alteration the MODE S code is changed. 

Installation of dual Sperry EDZ-601/603 Electonic Flight Instrument Systems.

ONE ONLY STC, SN BB784; Installation of dual Sperry EDZ-601/603 Electronic Flight Instrument Systems, a Global GNS-500A VLF/Omega Navigation System and a Sperry Data Nav IV System

Manufacture and installation of a Supplemental Lighting System

Installation of Bendix/King KRA 10A Radio Altimeter System, KR 22 Market Beacon Receiver, KN 64 DME, and KA 33 Equipment Fan.

ONE ONLY STC, SN BB-41: Installation of the Bendix/King CAS 67A TCAS II System

Installation of dual Avionics UNS-1L Flight Management Systems using Collins EFIS 84.

Installation of Norton radome kit No. 2090XS.

Installation of replacement fuel cell assemblies