Sorry, it was imprecise of me to call it the "GPWS computer", but the warning was reminiscent of GPWS.
I must say it seems to be poor human factors design for the system to announce some pseudo-cryptic code, "T6NL," instead of something more intelligible -- e.g. "Warning, Engine Overheat" (for instance). But perhaps I'm being too picky.
The video of that CT-155 incident is impressive. With a student and instructor onboard, it suffered a bird strike at 200 feet after a touch-and-go. Engine appears to fail, instructor takes control, and a few moments later they abandon the aircraft. The crew were extremely professional throughout the incident.
Both ejected safely but sadly the instructor damaged his spine.
The whole incident is over in about 30 seconds - it just shows how quickly things can turn to custard!!