Originally Posted by
KC10 FATboy
Your aircraft has standby instrumentation. Who cares if the weather is bad? If you have two good motors, standby instruments, and fuel to fly to an airport with better weather, why would you ever risk aborting for an instrumentation failure? Historical data is definitely not on your side in this decision.
Of course now that I do my last one I see the little "multi quote" button...
We are talking only on 600 RVR T/O's here. It is something the training dept came up with. We do have standby instruments, but they are not too friendly and worse case scenario our t/o alt can be 1 hour away while the batts to run the standy instruments only lasts 40 mins normal, 45 if you can turn off pitot ice, or 49 if you have steam back ups, since you get 9 mins of "reliable indications during gyro spool down". Worst case that could leave you with up to 20 mins of no instrumentation at all. Now of course I understand that is about as likely as me having to "Sully it in" to a pond, but thats how my plane works.
I mainly was just showing pretty much the only "non-standard" (fire, red light, etc) thing that I will brief an abort on. Things I take into account when I decide to add this are runway length...hub airport I have pleanty of room to stop...outstation I'm gonna take it in the air. How wide spread is the low wx, if its localized then the abort may not be worth the risk, if its widespread and my T/O alt is 1 hr away then it might be worth the risk.