Airbus rudder/tail problems?, page 1
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reply posted on 27-9-2005 @ 07:08 AM by elpasys
NTSB wrote:

"The Flight 587 crash [Airbus A300-605R (N14053)] on November 12, 2001, was the second deadliest aviation accident in American history. The aircraft's vertical stabilizer and rudder were found in Jamaica Bay, about a mile from the main wreckage site. The engines, which also separated from the aircraft, were found several blocks from the wreckage site. NTSB says pilot's excessive rudder pedal inputs led to the crash.

The plane's vertical stabilizer separated in flight as a result of aerodynamic loads that were created by the first officer's unnecessary and excessive rudder pedal inputs(???)

The investigation tryded to determine why those components - made of carbon fiber reinforced epoxy, a composite material - separated in flight. The Board found that the composite material used in constructing the vertical stabilizer was not a factor in the accident (!!!) because the tail failed well beyond its certificated and design limits. The Safety Board said that, although other pilots provided generally positive comments about the first officer's abilities, two pilots noted incidents that showed that he had a tendency to overreact to wake turbulence encounters. The Safety Board's airplane performance study showed that the high loads that eventually overstressed the vertical stabilizer were solely the result of the pilot's rudder pedal inputs and were not associated with the wake turbulence.

“Had the first officer stopped making inputs at any time before the vertical stabilizer failed, the natural stability of the aircraft would have returned the sideslip angle to near 0 degrees, and the accident would not have happened.”"


What went wrong? The first officer, the pedal, or unknown ENTROPY and decay?


reply posted on 27-9-2005 @ 08:43 AM by JIMC5499
Originally posted by elpasys
NTSB wrote:

The aircraft's vertical stabilizer and rudder were found in Jamaica Bay, about a mile from the main wreckage site. The engines, which also separated from the aircraft, were found several blocks from the wreckage site. NTSB says pilot's excessive rudder pedal inputs led to the crash.

The plane's vertical stabilizer separated in flight as a result of aerodynamic loads that were created by the first officer's unnecessary and excessive rudder pedal inputs(???)

The investigation tryded to determine why those components - made of carbon fiber reinforced epoxy, a composite material - separated in flight. The Board found that the composite material used in constructing the vertical stabilizer was not a factor in the accident (!!!) because the tail failed well beyond its certificated and design limits. The Safety Board said that, although other pilots provided generally positive comments about the first officer's abilities, two pilots noted incidents that showed that he had a tendency to overreact to wake turbulence encounters. The Safety Board's airplane performance study showed that the high loads that eventually overstressed the vertical stabilizer were solely the result of the pilot's rudder pedal inputs and were not associated with the wake turbulence.

“Had the first officer stopped making inputs at any time before the vertical stabilizer failed, the natural stability of the aircraft would have returned the sideslip angle to near 0 degrees, and the accident would not have happened.”"


The main question is not the strength of the materials in the vertical stabilizer. It has been determined that the loads on the stabilizer were many times what was specified in the design. My question is this "Why was the First Officer making such large rudder inputs for? Was it a malfunction in the fly by wire system? Was it lack of experience? Was it poor training? Was he just goofong off? It seems to me once the strength of stabilizer assembly was determined (letting Airbus off of the hook) no one has been interested in what really caused this crash.

The National Transportation Safety Board determines the probable cause(s) of this accident as follows:

the in-flight separation of the vertical stabilizer as a result of the loads beyond ultimate design that were created by the first officer's unnecessary and excessive rudder pedal inputs. Contributing to these rudder pedal inputs were characteristics of the Airbus A300-600 rudder system design and elements of the American Airlines Advanced Aircraft Maneuvering Program.

NTSB Report

There is no information on what may have caused the First Oficer to over controll the aircraft.


reply posted on 27-9-2005 @ 09:44 AM by elpasys
In February 1996 the space shuttle Columbia was on a mission as a
spacegenerator - accelerator with a satellite, in searching of the Higgs
Boson. This experimental satellite was tethered to the space shuttle by a
12,8 mile long cable, which was blown apart by an unpredictable excess of
energy. The satellite was lost in space. The end of the tether looked
charred and melted. There was a large electrical discharge along the tether.
What went wrong? What went successful? Was the Higgs
Boson discovered?

The forces developed by "cold plasma" (or entropy) can be thousands of times greater than theory predicts. All electronics was fried. It would seem that this possibility, which owes its origin to a fundamental breach of physical law, was not factored into the design of the experiment. It is no wonder that the cable fused and the mission failed and that is all because the extremely high anomalous "cold plasma" (or entropy) forces know from decades of research have never been properly understood by the scientific community. The failure of a space mission aimed at generating power in space because far more power was produced than was bargained for. It had not been understood that the "false vacuum" which fills that space is ready and willing to shed excess energy once we contrive to develop circuital current flow.

In 1996(!) Aspden H. in "Space Shuttle "Columbia" Encounters Excess Energy. New Energy News". Vol. 3, № 9, March 1996, pp. 1-2.
]http://www.padrak.com/ine/BLOWSNASA.html]
wrote:
"The United States of America should not be sending men into space on
missions aimed at power generation by tapping into plasma fields until
enough research on the anomalous plasma discharge problem has been done in the Earth-based laboratory environment to understand fully this mystery energy source."

On February 1, 2003 the space shuttle Columbia was lost during its re-entry into Earth's atmosphere. What went wrong?
The investigation into what caused the break-up of the space shuttle
supports the theory that a left wing panel broke off during its mission,
possibly playing a role in its demise. The wing fragment where heat spiked
just before the spacecraft disintegrated is made of a sophisticated material
known as reinforced CARBON, that is designed to withstand extreme heat, but not ENTROPY. Corrosion along the wing's front edge might also have played a part. Investigators have narrowed the location where devastating superheated atmospheric gases entered the shuttle during its re-entry to somewhere near the leading edge of the left wing.

The investigators do not know where the breach in the wing was, but they say their probe points to several theories (entropy law or Second aw???) . .

Due to entropy, hiding damage of an airplane or a space shuttle, if not
addressed, may led to multiple site fatigue damage and fatigue cracking and could result in structural failure of the airplane or the space shuttle. The manufacturers of pressurized transport-category airplanes or space shuttles have to include in their structural repair manuals, training programs, and other maintenance guidance, warnings about the possibility of structural failure resulting from hidden damage.

Entropy won?


reply posted on 27-9-2005 @ 09:46 AM by frayed1
The LA Times has an article about another possible problem with the Airbus A380......

A U.S. engineer faces bankruptcy and arrest in Austria as he questions the safety of a component in the huge Airbus A380 jetliner.......

Mangan alleges that flaws in a microprocessor could cause the valves that maintain cabin pressure on the A380 to accidentally open during flight, allowing air to leak out so rapidly that everyone aboard could lose consciousness within seconds.


He has gotten into a world of trouble for bringing this out in the open, as he worked for the European manufacturer and they are not restrained under any whistleblower protection laws.
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