Is It A Thrust Warning Lights On A C336 Required?

[general]

The thrust warning lights on my 336 were terribly unreliable. Use all your assets to determine if you have power. The thrust warning lights were an after thought by Cessna which proved unreliable, and that's probably why you don't see them on later Skymasters. You're not going to see them in a minimum equipment list for a Cessna 336 and I've worked for Cessna on 337 projects before.