1. CPDLC , FANS 1A, and associated CVR upgrade.
2. IOCABUCCI espresso machine upgrade. Need at least parts list of plumbing.
3. ? Elt upgrade?
4. DU875AF display upgrades.
5. WR 870 Upgrade, PROSTAR aviation.
6. CDU-820(?) Upgrades. 3 FMS CDUS are upgraded, no prints.
7. Davtron clock upgrades
8.
This is an example from F900EX Sn 001.

ELT
18554068724 U.S. Coast Guard for EPIRB accedental activation
18008513051 Air Force for ELT or PRB accedental activation
Also, call this number to check current registration.
1 (888) 212-7283. NOAA registration data base.
Have this stuff ready before you log on:
https://beaconregistration.noaa.gov/RGDB/registrationRequirements

Bistable relay contacts resistance

https://www.scribd.com/document/406201644/G150-FSECU-Downloading-Step-by-Step

Repair of FSTRB P/N 1252750-27-50 S/N 029
Structual adhesive
Click bond

Locktight

Blog to hold some troubleshooting information