Originally Posted by
Lantirn
Have a question and since the subject is relevant, will post it here to not open new thread.
When in takeoff, in a speed discrepancy between PFD1 and PFD2 you apply memo items. When in cruise you dont have to, since the safety of the flight is not impacted. 2,5 and 78 and off you go for the 320.
What is not clear to me is how you handle that when climbing and passing lets say 10.000
Do you still apply memos and then go through QRH? Or do you disconnect FDs/AP and level off with known values that we know from memory (3 and 60 works fine) and then go through QRH?
Have done both in the sim, however I am not sure which is the correct one, but the second seems incorrect to me. Instructor didnt tell me anything about that.
Its a stupid habit I have to avoid overspeed warnings when climbing with blocked pitot tube. I complete the procedure and then climb to avoid all that noise in the sim. But dont think thats correct way
You apply the memory items when the safe conduct of the flight is impacted as you correctly said. In the scenario you describe you have to mainly assess the MORA, wx conditions (IMC in icing conditions?) and the energy state of the aircraft prior to your acknowledgment of the failure (where you climbing at green dot to make an ATC restriction? Where You at the standard 250/10000ft/econ climb ?). In other words, am I happy with current pitch/thrust with respect to the environment? If the answer is yes, than keep your present parameters and ask for the unreliable speed checklist to level off for trouble shooting and don’t forget to communicate with ATC your situation. You still must disconnect AP/FD/ATHR anyway as you don’t want the automation to start chasing erroneous parameters. Besides that, any harm in having 5 degrees ANU and CL thrust passing 10’000ft (memory items value) ? Your normal climb parameters will be the same in terms of thrust and almost the same in terms of pitch. One thing: don’t level off by memory. It’s a big no-no. If Airbus wanted us to know 6/60 or whatever they would have put it as a memory item as well. Levelling of by memory because you’ve read it works on pprune doesn’t look nice at all. Always use known and official parameters. If the aircraft climbs, then keep climbing, no one has ever hit the sky and the t-cas is there for this reason. Once you have figured out the level-off parameters then apply them.