Yes, you must pull circuit breakers to preserve battery power!
Well, if you're mid pacific at night in IMC you'll need your SAI to maintain hand-flown wings level attitude. You don't need to power the VHF and emergency lights, inverter, etc and run your battery dead!
Without the SAI you'll spiral into the ocean, that's for sure. Under the circumstances you have no choice but to keep the SAI powered for as long as you can, and in order to do that you'll have to get creative and pull circuit breakers of everything that the battery powers except the SAI. There simply is no other option if you are to survive in IMC at night!
The packs will keep running and the outflow valves will maintain position. So you keep on trucking; maintain your altitude, fly headings with your wet compass according to the headings on your flight plan until you reach the coast. Your wristwatch will tell you when you get close to the coast. Then put the circuit breakers back, and talk to somebody.
Last edited by GlueBall; 13th Jan 2008 at 04:30.