I can just imagine the scenario…
Hauled up in front of the AAIB – ‘so let me get this right, you landed at Zakynthos with max reverse and a required autobrake setting of * which required a Boeing mandated brake cooling period of 1 hr 15 mins. You then got out of the cockpit, poured water on the brakes and departed after 45 mins…’
Draw your own conclusions as to the wisdom!
Personally I believe the E4 version of the RB211 is superb (and significantly better than the original versions). I am quite sold on the CFM56 even though they seem to run quite hot. The Trent is good however I still have a few minor issues with it which I hope will disappear with more time together.
Airbus and Boeing manuals contain guidance for brake cooling involving passage of time and use of brake fans (if fitted). At no point is any other technique (such as pouring water) taken into consideration. Any operator encouraging this sort of thing is substandard and worth avoiding. This is ‘hung out to dry’ stuff if it was followed by an accident.
Remembering the difficulties we used to have with brake cooling on the 757-300 on a typical charter turnaround I’d suggest that if it isn’t recommended in the flight manual I’d leave well alone. About as sensible as peeing on an electric fence IMO.
You know there are some on this forum that truely believe that if they shout really, really loud then everything they say becomes true! 🙂
…And yes I read all the posts, but I find it hard to believe an airplane that is nearly 250 feet long can only carry up to 440 passengers. The 777-300 can carry up to 550!
But Phantom, you obviously still havn’t read all the above as I said on the 2nd of June ‘…If the need arose then Airbus could up the limit with further testing…’.
Therein lies your answer.
Can’t say much yet. More will come out of this over the next few days including one thing which if I’m right will prove VERY entertaining!
You mean to tell me the A340-600 is only rated for carrying up to 440 people?
What if any were ever ordered for East Asian Domestic routes where the number of people per plane has to be huge. 747-400’s operating in that role carry up to 568 people.
Surely the A340-600 can at least carry 500?
440 for the -300 sounds right, but the -500 and -600? And what about the -200?
P.S. Aren’t both models of the A330 rated for up to 440 pax?
Phantom – have you considered reading the posts above before replying? :p
Very similar systems, whereas Airbus using computers to control squencing valves to move fuel/deliver fuel, Boeing relies on higher output pressures, and pilot interaction. Boeing use cabin pressure to move fuel about (744ER) airbus use pumps. You can argue it either way, remove as much fuel managment (in ther air) from the pilot, and not only have you reduced workload, you have reduced the chance of error. IMHO
…but…one manufacturer designed a system in use in most (all?) of it’s types that involves running tanks dry in such a way that it lead to the risk of explosion within the tanks (remember TWA800?). Many Boeings have been carting about extra fuel for the last few years because of fears of uncovered fuel pumps. And some people are trying to claim that the Boeing system is a proven one!!! :p
Things don’t get put into service without testing them first. When I say ‘daily basis’ I mean that it is constantly being evolved rather than literally uploading a different piece of software each day!
SC – More than happy to divulge next time we meet! Glad to hear that you havn’t had any finger trouble…but then your airline wasn’t one of them!
Max passenger seating on the A340-300 is 440. The A340-600 has also been certified as 440 seats as there are no plans for anyone to operate with any more than that. If the need arose then Airbus could up the limit with further testing.
Nice little dig there Wys.
Have you ever considered that Boeing are using the fuel system they do because they know it works and does not need updating? Unlike its buggy Airbus counterpart?
Sorry Sandy but I can identify 3 separate cases of B744 fuel system ‘finger trouble’ this year alone, so I’d hardly say it works well and wouldn’t benefit from updating. Apologies for saying that lack of FCMC’s means downgrading to operating like a Boeing but that’s just how it is whether you like it or not.
Shadow1 – The FCMC architecture was changed totally from the A343 to the A346 as the fuel system is very very different between the two. Airbus software is constantly being updated on a day to day basis to include the latest developments (something you cannot easily do on a non-computer driven aircraft) so even an old aeroplane is constantly evolving.
The Fuel Control Monitoring Computers software has been problematic on the A346 as highlighted by the recent Amsterdam diversion. This has now been resolved with a software update. The problem centered around an FCMC failure which managed occur without being noticed by monitoring systems and therefore did not flag up any warnings. Operation without FCMC’s is not problematic (it is equivalent to downgrading the system to the same as that installed in a Boeing) however if you don’t know the system is not working then you don’t know that you need to manually operate the valves to move fuel.
While probably pilot error there is a phenomenon with VHF frequencies known as PLOC (prolonged loss of communication) currently under investigation where aircraft normally capable of receiving (within line of sight) do not.
Vortex – how are Boeing planning to pressurise the aircraft without bleeds? Ram air? Separate compressors? If so, driven by what?