We had the SFENA (I thought it was SFIM?) machine in the Brent Field for a short period. IIRC, it was G-BARJ, but the enduring problem was the system tripping off line in the slightest bit of turbulence. With rig shuttles, and a landing every 5 minutes or so, we eventually put a 2nd pilot in, to reset the SFENA when it tripped, usually on approach
The French finally sent over a team to look at the problem, but, surprisingly, it "was not our fault. Your engineers have set the aircraft up so that our magnificent system cannot possibly manage".
About a month after we foisted the 212 onto another operation, the French provided a fix for the problem, which wasn't their fault, either.........
FWIW, this was the aircraft that was trumpeted, with much publicity, as the first SPIFR 212 to be developed.