Well I'm not on 9.2 and I cant even dump or load hs.app on my sysnand.
Also when running FBi.3ds through my gateway and try installing a CIA it gets to 100% and then says error 0xC88044, file doesnt exist / cant be found
in that case what you can do is delete the system title of the health and safety app, and reinstall it with the cia, you could get it using nus downloader, or downloading a 6.1 firmware pack, since its in that version the last time it was updated on the old 3ds, so it contains the cia.
If your console is an American O3DS then the title id is: 0004001000021300 (so you need the 0004001000021300.cia)
so.. before doing anything, find that cia!!!
then go to fbi (.3ds Version) > titles, and delete the title with that id
after that install the cia to so that the health and safety app its reinstalled, this time, hopefully, it will not be split in diferent parts of the fragmented nand.
Now you should be able to inject fbi from hourglas9.
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also.. if you cant install fbi from the gateway .3ds version.. try the other cia installers, big blue menu, fbi 1.x,etc.
if any of them install properly, than reboot the console and enter luma instead of gateway, and attemp to install fbi 2.4.2 from there with any of those cia installers