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Old 10th May 2012, 15:19   #158 (permalink)
Join Date: Apr 2002
Location: FUBAR
Posts: 3,319
On 737 it is normal when leaving the aircraft unattended to have Batt Sw off & Gnd Pwr in use. Then, when the GP is disconnected (or becomes accidentally disconnected) no need to do anything to avoid arriving in the morning to find a flat Batt.

Anyway,forget all this switchology discussion, all said & done, TAWS is there to save you if all the rest goes wrong, not to enable/facilitate you fooling around below MSA in the mountains in [email protected] wx.

Without wishing to prejudge, I think the cause is going to be a whole lot simpler than anything technology based.
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