http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/ Thu, 24 May 2012 01:25:07 +0000 hourly 1 http://wordpress.org/?v=3.3.2 http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/comment-page-1/#comment-5876 Murray Cohen, P.E.(RETIRED, FLIGHT CONTROLS ENGINEER) Tue, 25 Sep 2007 14:21:00 +0000 http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/#comment-5876 Murray I have been following the Q400 accidents that occurred in Denmark and Lithuania very closely and consider these accidents to be very critical situations. These failures are giving the aircraft industry a subtle, but urgent warning that must be addressed. I found a report, dated September 15,2007 online re - Preliminary Report on Danish SAS Q400 accident that included a very useful drawing in analyzing the failure mode. It would also be very useful to review a drawing or sketch of the main landing gear retract/extend actuator, manufactured by the Goodrich Corp. in Tullahoma, Tennessee to confirm my analysis of these failures. Please note that a nose gear incident occurred in Japan in March, 2007, and I suspect that it probably contains a similar actuator design as the main landing gear system. If this is true, it would be very important to inspect the nose landing gear actuator as well as the main landing gear actuator. In my study of the main landing gear reports, they discuss the fact that the jam nut backed off and the lockwire was missing. Most of the hydraulic actuators used in the aircraft industry contain a locking device to prevent rotation of the actuator piston and are secured by a jam nut, and lockwired to prevent the jam nut and the locking device from backing off. This condition could eventually cause a disconnection of the rod end, which was actually stated in preliminary reports. This scenario may have actually occurred after 10,000 cycles and severe impact upon landing. I was surprised that no mention was made of the use of a locking device in the design of the main landing gear actuator. Murray
I have been following the Q400 accidents that occurred in Denmark and Lithuania very closely and consider these accidents to be very critical situations. These failures are giving the aircraft industry a subtle, but urgent warning that must be addressed. I found a report, dated September 15,2007 online re – Preliminary Report on Danish SAS Q400 accident that included a very useful drawing in analyzing the failure mode. It would also be very useful to review a drawing or sketch of the main landing gear retract/extend actuator, manufactured by the Goodrich Corp. in Tullahoma, Tennessee to confirm my analysis of these failures. Please note that a nose gear incident occurred in Japan in March, 2007, and I suspect that it probably contains a similar actuator design as the main landing gear system. If this is true, it would be very important to inspect the nose landing gear actuator as well as the main landing gear actuator. In my study of the main landing gear reports, they discuss the fact that the jam nut backed off and the lockwire was missing. Most of the hydraulic actuators used in the aircraft industry contain a locking device to prevent rotation of the actuator piston and are secured by a jam nut, and lockwired to prevent the jam nut and the locking device from backing off. This condition could eventually cause a disconnection of the rod end, which was actually stated in preliminary reports. This scenario may have actually occurred after 10,000 cycles and severe impact upon landing. I was surprised that no mention was made of the use of a locking device in the design of the main landing gear actuator.

]]> http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/comment-page-1/#comment-484 The best Movies - Airbus A380 first time visit of the US at Flightstory.net - Blog Wed, 21 Mar 2007 13:08:02 +0000 http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/#comment-484 [...] (Provided by crankyflier.com) [...] [...] (Provided by crankyflier.com) [...]

]]> http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/comment-page-1/#comment-481 Patrick Tue, 20 Mar 2007 13:45:17 +0000 http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/#comment-481 Interesting. The LA Times alluded to a nose-wheel shimmy, but the plane swerved before the nose wheel even made contact with the runway. Airbus and the FAA say the landing was "normal" ;) Interesting. The LA Times alluded to a nose-wheel shimmy, but the plane swerved before the nose wheel even made contact with the runway. Airbus and the FAA say the landing was “normal” ;)

]]> http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/comment-page-1/#comment-480 Patrick Tue, 20 Mar 2007 02:46:36 +0000 http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/#comment-480 I just watched the video of the LAX A380 arriving on CNN - it was shot from a helicopter. About 3 seconds after the main gear touched down, it swerved pretty hard to the right - it looked like the pilot had to make full left rudder deflection to correct. It didn't look very pretty! I just watched the video of the LAX A380 arriving on CNN – it was shot from a helicopter. About 3 seconds after the main gear touched down, it swerved pretty hard to the right – it looked like the pilot had to make full left rudder deflection to correct. It didn’t look very pretty!

]]> http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/comment-page-1/#comment-479 Tony Mon, 19 Mar 2007 22:14:58 +0000 http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/#comment-479 Thanks for the footage. Way cool! Thanks for the footage. Way cool!

]]> http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/comment-page-1/#comment-478 Blacknell.net » A380 Coming to IAD - But We Don’t Get To See It Mon, 19 Mar 2007 21:39:09 +0000 http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/#comment-478 [...] Crankyflier shows us what we missed. You can leave a comment, or trackback from your own site. RSS [...] [...] Crankyflier shows us what we missed. You can leave a comment, or trackback from your own site. RSS [...]

]]> http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/comment-page-1/#comment-477 Mike Mon, 19 Mar 2007 20:58:15 +0000 http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/#comment-477 Great! Thanks man! Great! Thanks man!

]]> http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/comment-page-1/#comment-476 AviationViews » Blog Archive » A380 Heads to the US Today Mon, 19 Mar 2007 20:52:16 +0000 http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/#comment-476 [...] UPDATE:  As promise fellow blogger The Cranky Flier was at LAX for the arrival of the A380 and he shot some video.  Click here to check it out. [...] [...] UPDATE:  As promise fellow blogger The Cranky Flier was at LAX for the arrival of the A380 and he shot some video.  Click here to check it out. [...]

]]> http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/comment-page-1/#comment-475 Airline State Mon, 19 Mar 2007 20:50:14 +0000 http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/#comment-475 Nice, I've been waiting for this all day. Can't make it to ORD tomorrow so I am living vicariously through you at LAX ;) Nice, I’ve been waiting for this all day. Can’t make it to ORD tomorrow so I am living vicariously through you at LAX ;)

]]> http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/comment-page-1/#comment-474 Flight Wisdom » Cranky Flier Shoots A380 Video Mon, 19 Mar 2007 20:26:48 +0000 http://crankyflier.com/2007/03/19/the-a380-arrives-at-lax/#comment-474 [...] here to catch a look at his report… “It’s definitely not the best looking plane around, but man is it big…The [...] [...] here to catch a look at his report… “It’s definitely not the best looking plane around, but man is it big…The [...]

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