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Thread: Is it a dream or a nightmare?

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    Moderator Octarine's Avatar
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    Default Re: Is it a dream or a nightmare?

    Just some news editors happy to fill space ..
    EOS

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    Default Re: Is it a dream or a nightmare?

    I personally had a bad experience on the a380. at one point we thought we might just fall out of the sky.

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    Moderator Octarine's Avatar
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    Default Re: Is it a dream or a nightmare?

    Quote Originally Posted by cks2k2 View Post
    I personally had a bad experience on the a380. at one point we thought we might just fall out of the sky.
    Can you elaborate more? Blaming the aircraft for what maybe only was a 'hole' on the air is a bit too fast, they happen to all aircrafts..
    EOS

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    Default Re: Is it a dream or a nightmare?

    Quote Originally Posted by Octarine View Post
    Can you elaborate more? Blaming the aircraft for what maybe only was a 'hole' on the air is a bit too fast, they happen to all aircrafts..
    hydraulic system failure. had to return to changi to switch planes.

  7. #7

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    Quote Originally Posted by cks2k2

    hydraulic system failure. had to return to changi to switch planes.
    Why would you believe a hydraulic system problem will cause you to fall out of the sky?

    You're being paranoid.

  8. #8

    Default Re: Is it a dream or a nightmare?

    where's our resident expert 9 Victor...
    宁愿遇见丢失幼崽的母熊,也不愿碰上做蠢事的愚人

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    Senior Member madmartian's Avatar
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    Default Re: Is it a dream or a nightmare?

    Quote Originally Posted by Shizuma View Post
    where's our resident expert 9 Victor...
    Use your cat's eye to locate him quick.................................
    Take the shot!

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    Moderator rhino123's Avatar
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    Default Re: Is it a dream or a nightmare?

    I am always flying around... flew in A380 before, and so far no problem at all... Anyway, when I went up the plane, I close my eyes and sleep, awaken only to take my meals or use the toilet, all the other time, I sleep... (touch wood) I don't want to know how I die if something happen.
    I am not a photographer, just someone who happened to have a couple of cameras.
    My lousy shots

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    Default Re: Is it a dream or a nightmare?

    Quote Originally Posted by qystan View Post
    Why would you believe a hydraulic system problem will cause you to fall out of the sky?

    You're being paranoid.
    Cos the plane was shaking really badly. The pilot came out to talk to us, he said (how much is true?) a380 has 3 hydraulic systems (didn't say the system is for what); 1 has failed.
    At first the plan was to detour to Dubai and get it fixed there, later they change plan and say better u-turn back to changi.

  12. #12

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    Quote Originally Posted by cks2k2

    Cos the plane was shaking really badly. The pilot came out to talk to us, he said (how much is true?) a380 has 3 hydraulic systems (didn't say the system is for what); 1 has failed.
    At first the plan was to detour to Dubai and get it fixed there, later they change plan and say better u-turn back to changi.
    The shaking is just the weather.

    If he didn't say a word, you'd arrive at your destination and not know about it.

    Modern jets have multiple systems and are fully capable of operating normally with just 1 system. Compared to everything else, air travel is the safest.

    Your turning back is just the people process to ensure safety margins are kept.

  13. #13

    Default Re: Is it a dream or a nightmare?

    Quote Originally Posted by cks2k2 View Post
    Cos the plane was shaking really badly. The pilot came out to talk to us, he said (how much is true?) a380 has 3 hydraulic systems (didn't say the system is for what); 1 has failed.
    At first the plan was to detour to Dubai and get it fixed there, later they change plan and say better u-turn back to changi.
    Airline Pilots deliberately fly through bad weather because it saves the airlines money, compared to flying around bad weather. Weather radar can see a stormcloud hundred of miles away!
    宁愿遇见丢失幼崽的母熊,也不愿碰上做蠢事的愚人

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    Moderator Octarine's Avatar
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    Default Re: Is it a dream or a nightmare?

    Quote Originally Posted by cks2k2 View Post
    Cos the plane was shaking really badly. The pilot came out to talk to us, he said (how much is true?) a380 has 3 hydraulic systems (didn't say the system is for what); 1 has failed.
    At first the plan was to detour to Dubai and get it fixed there, later they change plan and say better u-turn back to changi.
    The shaking was just the weather. Maybe you should watch the youtube videos about aircraft incidents. Lots of good knowledge coming along with it, including something about the 3 hydraulic systems. Just note that in 787 Dreamliner it's a bit different.
    EOS

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    Moderator Octarine's Avatar
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    Default Re: Is it a dream or a nightmare?

    Quote Originally Posted by Shizuma View Post
    Airline Pilots deliberately fly through bad weather because it saves the airlines money, compared to flying around bad weather. Weather radar can see a stormcloud hundred of miles away!
    After AF247 I think they will not simply do this anymore. Even on a short flight from KL to SG the pilot made a small detour to keep some distance to the bad weather.
    EOS

  16. #16

    Default Re: Is it a dream or a nightmare?

    Quote Originally Posted by qystan View Post
    The shaking is just the weather.

    If he didn't say a word, you'd arrive at your destination and not know about it.

    Modern jets have multiple systems and are fully capable of operating normally with just 1 system. Compared to everything else, air travel is the safest.

    Your turning back is just the people process to ensure safety margins are kept.
    Yes they have lots of built-in redundancy, but the shaking was pretty intense. Kinda like driving thru a jungle trail.
    Don't think it was the weather.
    Anyway the captain kept assuring us that the plane can still reach our destination (London) or worst case detour to Dubai but in the end u-turn.
    So I spent 20+ hours total getting to London.

  17. #17

    Default Re: Is it a dream or a nightmare?

    sit at the wing root area and watch the wing flex . scary
    宁愿遇见丢失幼崽的母熊,也不愿碰上做蠢事的愚人

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    Default Re: Is it a dream or a nightmare?

    Boeing Dreamliner: US joins Japan in grounding 787s | Business | The Guardian

    BBC News - Dreamliner: Most Boeing 787 planes grounded on safety fears

    Japan Ministry of Transport
    USA FAA
    Chilean Aeronautical Authority
    Indian aviation regulators


    Poland's Lot Airlines
    Qatar Airways

    In some cases, it is the country's regulators deciding to stop. In some cases it is the airline deciding to stop.
    When a country's regulators decide to stop, it means any 787 planes operated by ALL airlines of that country.

    So, can the affected airlines claim damages from Boeing arising from losses suffered from cancelled flights and loss to their reputation?

    Probably a strategic reason for the country's regulators to impose stoppage.
    This way, it may be easier for the affected airline to claim damages from Boeing.
    It may be harder if the airline decided on its own to stop all 787 flights.

    Once Japan's Ministry of Transport decided, the other countries' regulators are under pressure.

    They have to decide whether to ground all 787s belonging to their own country's airlines.

    If they did not and there is a serious crash where hundreds of passengers are killed, then that country's regulators are in serious trouble. Probability of this happening is very low but the regulators cannot afford to take this risk. If that happened, the public and the media will be asking, why did they not do anything when Japan already stopped. So basically they have no choice.
    Last edited by ricohflex; 17th January 2013 at 08:41 PM.

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    Member 9V-Orion Images's Avatar
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    Default Re: Is it a dream or a nightmare?

    Quote Originally Posted by cks2k2 View Post
    Cos the plane was shaking really badly. The pilot came out to talk to us, he said (how much is true?) a380 has 3 hydraulic systems (didn't say the system is for what); 1 has failed.
    At first the plan was to detour to Dubai and get it fixed there, later they change plan and say better u-turn back to changi.
    Actually the A380 only have two independent hydraulic channels, yellow and green with each channel pressurised by four engine driven pumps (only two is required) at 5000 psi though it is supplemented by several Electrical-Hydrostatic Actuators (EHAs) and Electrical Backup Hydraulic Actuators (EBHAs) as well.

    You also have four main engine driven Alternating Current (AC) generators providing 115 Volts Alternating Current (VAC) at 150 kilovolt-ampere (kVA) each to four independent AC buses (AC 1 to AC 4), not to mention the Auxiliary Power Unit (APU) with two AC generators providing 115 VAC at 120 KVA each and ultimately, the Ram Air Turbine (RAT) is there to ensure the EHAs and EBHAs do not go offline by providing electrical power to a separate AC Essential (AC ESS) and a AC Emergency (AC EMER) bus.

    IF ALL OF THE ABOVE FAILS with the possibility that you may strike the first prize lottery 14 days in a row, the A380 will hopefully degrade gracefully from normal flight control law to alternate or even direct flight control law giving the pilot enough time to land with differential engine thrust before plunging to the ground.
    Last edited by 9V-Orion Images; 17th January 2013 at 09:38 PM.
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    Senior Member Halfmoon's Avatar
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    Default Re: Is it a dream or a nightmare?

    Quote Originally Posted by 9V-Orion Images View Post
    Actually the A380 only have two independent hydraulic channels, yellow and green with each channel pressurised by four engine driven pumps (only two is required) at 5000 psi though it is supplemented by several Electrical-Hydrostatic Actuators (EHAs) and Electrical Backup Hydraulic Actuators (EBHAs) as well.

    You also have four main engine driven Alternating Current (AC) generators providing 115 Volts Alternating Current (VAC) at 150 kilovolt-ampere (kVA) each to four independent AC buses (AC 1 to AC 4), not to mention the Auxiliary Power Unit (APU) with two AC generators providing 115 VAC at 120 KVA each and ultimately, the Ram Air Turbine (RAT) is there to ensure the EHAs and EBHAs do not go offline by providing electrical power to a separate AC Essential (AC ESS) and a AC Emergency (AC EMER) bus.

    IF ALL OF THE ABOVE FAILS with the possibility that you may strike the first prize lottery 14 days in a row, the A380 will hopefully degrade gracefully from normal flight control law to alternate or even direct flight control law giving the pilot enough time to land with differential engine thrust before plunging to the ground.
    BRo, are you a electrial eng?
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