1.)In case of dual generator failure. Starting APU and you should connect the GEN 2 first to charge the battery through the TR3. Why? Don´t understand because GEN 2 powers the mainbus and the battery charger is then supplied? Where´s my fault?
What else does TR3 do?
737 Electrics
2.) How long can the speedbrake be deployed. I mean with which flap setting? up to flaps 15?
No limit but best not more than F5 due to tailplane buffet - don't want it falling off, do we?
Not recommended more than flap five due increased roll sensitivity.
3.)Where in the MEL can I find wether i have to have the athr engaged during the CAT III or not?
Not in MEL - in your AWOPS limitations section - A/T mandatory IF AVALABLE.
Under the MEL for the autothrottle, I would think. Autoland with manual throttle permitted in my company.
4.) Imagine ATHR is okay during CATIII approach and it does not retard. Can i retard the thrust levers on my own? So disconnect the autothrottle and pull them back?
Yes, (or just close them) just do not press TOGA
5.) Is a cat III II landing in contaminated runway allowed? Which penalty must be applied?
LDA check plus what are your AWOPS crosswind limits in your OM?
My company has a requirement for edge and/or centre lighting to be visible on any contaminated landing. More restrictive crosswind limits apply. Other than that, there are no specific restrictions.
6.) When the ATHR is in HLD during takeoff till 400ft AGL and i get a windshear in 200 ft AGL and pressing the TOGA buttons, nothing will happen right?
Are you not at TOGA already? What does QRH say you should do?
TOGA is a Flight Director and autopilot mode. The autothrottle will be in THR HLD. If you're in performing a reduced thrust take-off with the N1 bugs in Auto, the calculated reduced thrust will be bugged on the N1 gauges. Pressing the TOGA button below 800feet will change the thrust limit mode to GA, and the GA thrust limit will bug on the N1 (to give you something to aim at should you have pressed the TOGA due to a need to increase thrust) - you have to manually increase thrust. Above 800 feet the autothrottle will advance to GA thrust (as it exits THR HLD to N1 mode automatically at 800').