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#11
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"Nemo l'ancien" wrote in message ... Political and un-Diplomatic pressure from the foreign states heavily invested in the sucess of Airbus. The same for Boeing 737 tail problem... resolved for the entire fleet only in ....2012.... The Boeing tail problem is the same one the A-300 has; the 737 rudder PCU AD is basicly political bull****. Loss of ATC seperation led to a control surface stall and the pilot beat the rudder pedals through the floor. The difference is that the A-300 in question was equiped with a DFDR and we can know exactly what happened. We know the pilot's inputs to the airplane, the direction of deflection of the rudder and the aircraft's response to those control surface deflections. Flight AA587 was classic rudder reversal due to flow seperation. (stall) Referernce: Blakey's statement to the USAir 737 and AA A-300. |
#12
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"Ron Parsons" wrote in message ... In article , "Paul F Austin" wrote: "Robey Price" wrote After an exhausting session with Victoria's Secret Police, "Paul F Austin" confessed the following: My impression from reading the AvWeek reports is that this problem isn't unique to A300s nor to Airbus products. The fin can be overloaded in most transports if opposite rudder is commanded while a significant yaw has occurred. I'm not a pilot but AvWeek claimed that standard recovery training for transport pilots could lead to this condition. You are correct, I fly the 757 and we've recently had some expanded warning verbiage added to our flight manual about excessive rudder inputs during an engine failure. Pretty soon after that AA crash we were cautioned about excessive rudder inputs. .... Thanks for the information. I am somewhat amazed that the FAA doesn't require load analysis of the fin under yaw/extreme opposite rudder but (again according to AvWeek), it does not. Political and un-Diplomatic pressure from the foreign states heavily invested in the sucess of Airbus. Nonsense. The lack of analysis of that condition is long standing and applied to Lockheed, Boeing and McAir before Airbus was born. In case you have trouble keeping up, the failure mode that augered in AA587 probably applies to most jet transports. Because the analysis hasn't been done, you can't prove that_any_certified for passenger service will survive a rudder slam while in a sideslip at low altitude. You can fix the problem if 1. you know the envelope that's survivable and 2. you prevent excursions outside the envelope. You prevent the excursion (in increasing order of preferability) by training, by modifications to control "feel", by changes to control laws and by structural enhancements. The last may not be possible within acceptable weight and moment constraints. |
#13
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"Paul F Austin" wrote in message ... "Ron Parsons" wrote in message ... In article , "Paul F Austin" wrote: "Robey Price" wrote After an exhausting session with Victoria's Secret Police, "Paul F Austin" confessed the following: My impression from reading the AvWeek reports is that this problem isn't unique to A300s nor to Airbus products. The fin can be overloaded in most transports if opposite rudder is commanded while a significant yaw has occurred. I'm not a pilot but AvWeek claimed that standard recovery training for transport pilots could lead to this condition. You are correct, I fly the 757 and we've recently had some expanded warning verbiage added to our flight manual about excessive rudder inputs during an engine failure. Pretty soon after that AA crash we were cautioned about excessive rudder inputs. ... Thanks for the information. I am somewhat amazed that the FAA doesn't require load analysis of the fin under yaw/extreme opposite rudder but (again according to AvWeek), it does not. Political and un-Diplomatic pressure from the foreign states heavily invested in the sucess of Airbus. Nonsense. The lack of analysis of that condition is long standing and applied to Lockheed, Boeing and McAir before Airbus was born. In case you have trouble keeping up, the failure mode that augered in AA587 probably applies to most jet transports. Because the analysis hasn't been done, you can't prove that_any_certified for passenger service will survive a rudder slam while in a sideslip at low altitude. You can fix the problem if 1. you know the envelope that's survivable and 2. you prevent excursions outside the envelope. You prevent the excursion (in increasing order of preferability) by training, by modifications to control "feel", by changes to control laws and by structural enhancements. The last may not be possible within acceptable weight and moment constraints. Twin engine out takeoff requirements have driven regulation for these big rudders, until now. It is a fairly simple matter for AI to reduce the pilot's command authority by adjusting the control LAWs. |
#14
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"Ron Parsons" wrote in message ... In article , "Paul F Austin" wrote: "Robey Price" wrote After an exhausting session with Victoria's Secret Police, "Paul F Austin" confessed the following: My impression from reading the AvWeek reports is that this problem isn't unique to A300s nor to Airbus products. The fin can be overloaded in most transports if opposite rudder is commanded while a significant yaw has occurred. I'm not a pilot but AvWeek claimed that standard recovery training for transport pilots could lead to this condition. You are correct, I fly the 757 and we've recently had some expanded warning verbiage added to our flight manual about excessive rudder inputs during an engine failure. Pretty soon after that AA crash we were cautioned about excessive rudder inputs. snip Thanks for the information. I am somewhat amazed that the FAA doesn't require load analysis of the fin under yaw/extreme opposite rudder but (again according to AvWeek), it does not. Political and un-Diplomatic pressure from the foreign states heavily invested in the sucess of Airbus. ...and Boeing as well presumably, seeing as they potentially have the same problem. DUH! As I believe the youngsters say. -- Ron |
#15
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In article ,
"tw" wrote: "Ron Parsons" wrote in message ... In article , "Paul F Austin" wrote: "Robey Price" wrote After an exhausting session with Victoria's Secret Police, "Paul F Austin" confessed the following: My impression from reading the AvWeek reports is that this problem isn't unique to A300s nor to Airbus products. The fin can be overloaded in most transports if opposite rudder is commanded while a significant yaw has occurred. I'm not a pilot but AvWeek claimed that standard recovery training for transport pilots could lead to this condition. You are correct, I fly the 757 and we've recently had some expanded warning verbiage added to our flight manual about excessive rudder inputs during an engine failure. Pretty soon after that AA crash we were cautioned about excessive rudder inputs. snip Thanks for the information. I am somewhat amazed that the FAA doesn't require load analysis of the fin under yaw/extreme opposite rudder but (again according to AvWeek), it does not. Political and un-Diplomatic pressure from the foreign states heavily invested in the sucess of Airbus. ..and Boeing as well presumably, seeing as they potentially have the same problem. DUH! As I believe the youngsters say. Not exactly. Boeing has had hardover problems in the past, AA21 into Jamaca Bay back in the late '50s for example and the various 737 incidents. The Airbus has a totally different problem which only the pilots are willing to speak about. The fleet, including the AA587 aircraft has a history of uncommanded rudder fluctuations where the rudder slams back and forth between the stops so rapidly that the DFR can't record it. Airbus won't admit it might be a design flaw, AAL won't consider it might be improper maintainance. The NWA pilots were screaming their heads off about the wierd stuff that the FBW baby busses were doing, but the FAA turned a deaf ear. Airbus has been consistant in finding Pilot Error, in one case in Asia releasing their findings before the Accdent Investigation Team had even arrived at the site. The only reason that AAL has Airbus aircraft in the fleet is that it was a requirment in order to gain landing rights in Europe. FAA understands clearly that if they ground any of the busses, that the EU states involved with Airbus will ground Boeings. Now don't you feel safer? -- Ron |
#16
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"Ron Parsons" wrote in message ... In article , "tw" wrote: "Ron Parsons" wrote in message ... In article , "Paul F Austin" wrote: "Robey Price" wrote After an exhausting session with Victoria's Secret Police, "Paul F Austin" confessed the following: My impression from reading the AvWeek reports is that this problem isn't unique to A300s nor to Airbus products. The fin can be overloaded in most transports if opposite rudder is commanded while a significant yaw has occurred. I'm not a pilot but AvWeek claimed that standard recovery training for transport pilots could lead to this condition. You are correct, I fly the 757 and we've recently had some expanded warning verbiage added to our flight manual about excessive rudder inputs during an engine failure. Pretty soon after that AA crash we were cautioned about excessive rudder inputs. snip Thanks for the information. I am somewhat amazed that the FAA doesn't require load analysis of the fin under yaw/extreme opposite rudder but (again according to AvWeek), it does not. Political and un-Diplomatic pressure from the foreign states heavily invested in the sucess of Airbus. ..and Boeing as well presumably, seeing as they potentially have the same problem. DUH! As I believe the youngsters say. Not exactly. Boeing has had hardover problems in the past, AA21 into Jamaca Bay back in the late '50s for example and the various 737 incidents. Look up the post to where the 757 pilot says "You are correct, I fly the 757 and we've recently had some expanded warning verbiage added to our flight manual about excessive rudder inputs during an engine failure. Pretty soon after that AA crash we were cautioned about excessive rudder inputs." It is a conern for Boeing as well as Airbus - this has nothing to do with the dodgy hydraulic actuators that have been blamed for the hardover problem. The Airbus has a totally different problem which only the pilots are willing to speak about. The fleet, including the AA587 aircraft has a history of uncommanded rudder fluctuations where the rudder slams back and forth between the stops so rapidly that the DFR can't record it. Cite? How come this problem isn't showing up with all Airbus users? Airbus won't admit it might be a design flaw, AAL won't consider it might be improper maintainance. The NWA pilots were screaming their heads off about the wierd stuff that the FBW baby busses were doing, but the FAA turned a deaf ear. How come no other Airbus users are complaining? Airbus has been consistant in finding Pilot Error, in one case in Asia releasing their findings before the Accdent Investigation Team had even arrived at the site. Which one was that? The only reason that AAL has Airbus aircraft in the fleet is that it was a requirment in order to gain landing rights in Europe. I find that extremely hard to believe, do you have a source? FAA understands clearly that if they ground any of the busses, that the EU states involved with Airbus will ground Boeings. Again, cite? Now don't you feel safer? I certainly don't feel any less safe |
#17
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"Ron Parsons" wrote in message ... In article , Not exactly. Boeing has had hardover problems in the past, AA21 into Jamaca Bay back in the late '50s for example and the various 737 incidents. The Airbus has a totally different problem which only the pilots are willing to speak about. The fleet, including the AA587 aircraft has a history of uncommanded rudder fluctuations where the rudder slams back and forth between the stops so rapidly that the DFR can't record it. This sounds extremely dubious, the DFR can record events that take less than a millisecond, the rudder is much to massive to move in that time. Airbus won't admit it might be a design flaw, AAL won't consider it might be improper maintainance. The NWA pilots were screaming their heads off about the wierd stuff that the FBW baby busses were doing, but the FAA turned a deaf ear. The A-300 isnt a FBW aircraft it uses conventional control systems. Keith |
#18
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After an exhausting session with Victoria's Secret Police, Ron
Parsons confessed the following: The NWA pilots were screaming their heads off about the wierd stuff that the FBW baby busses were doing, but the FAA turned a deaf ear. Got anything specific WRT this claim? Not saying weird stuff doesn't happen, but the pilot grapevine never reflected anything resembling NWA pilots "screaming their heads off" and the FAA ignoring them. I'll be the first to admit that lots of stupid pilot/airplane tricks never make it thru to the rank and file, but I've not seen any sign of your claim on the ALPA site or the NWA forums. Many of us call the A-320, "Fifi" (IOW a french dog or the Poodle in deference to United guys and O'Hare's ground controllers calling the 737 a Guppy) ergo the A319 is a "minature poodle." This is no more mean spirited than F-15 guys calling the F-16 the Lawn Dart, Viper guys calling Eagle guys, "Ego drivers." Juvat |
#19
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"Robey Price" wrote in message ... After an exhausting session with Victoria's Secret Police, Ron Parsons confessed the following: The NWA pilots were screaming their heads off about the wierd stuff that the FBW baby busses were doing, but the FAA turned a deaf ear. Got anything specific WRT this claim? Not saying weird stuff doesn't happen, but the pilot grapevine never reflected anything resembling NWA pilots "screaming their heads off" and the FAA ignoring them. The only think I ever heard was that hose early A-320s were noisey and that is true. They had a little bandwidth starvation problem in the flight control computer, but it is corrected. I'll be the first to admit that lots of stupid pilot/airplane tricks never make it thru to the rank and file, but I've not seen any sign of your claim on the ALPA site or the NWA forums. Many of us call the A-320, "Fifi" (IOW a french dog or the Poodle in deference to United guys and O'Hare's ground controllers calling the 737 a Guppy) ergo the A319 is a "minature poodle." This is no more mean spirited than F-15 guys calling the F-16 the Lawn Dart, Viper guys calling Eagle guys, "Ego drivers." A little friendly chatter is a good thing. |
#20
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After an exhausting session with Victoria's Secret Police, "Tarver
Engineering" confessed the following: The only think I ever heard was that hose early A-320s were noisey and that is true. In a different vein...I've heard of the "airbus whine," which was used by a Denver Center controller last month. In a strictly anecdotal observation, A320/319 crews were complaining about the quality of their "ride" more often than 737/757 folks, and airbus guys were requesting frequent altitude changes. Not to mention the airbus insults you upon touchdown, "Retard... retard...retard..." A little friendly chatter is a good thing. True. Juvat |
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