In that case, a mechanism known as a jackscrew failed because of shoddy maintenance, causing the plane to become uncontrollable. From Wordnik.com. [Obama's Jet] Reference
There have been some reports that there may have been common problems with something called a jackscrew, some different types of bolts have been problematic. From Wordnik.com. [CNN Transcript - Special Event: NTSB Chairman Jim Hall Holds News Conference on Alaska Airlines Flight 261 Crash Investigation - February 8, 2000] Reference
We can give you a little look at what the jackscrew is. From Wordnik.com. [CNN Transcript Feb 10, 2000] Reference
What we're focusing on right now, as you've indicated, is the jackscrew and that's the inspection that's taking place. From Wordnik.com. [CNN Transcript Feb 13, 2000] Reference
Since last Thursday, some 21 planes have been found to have irregularities in the jackscrew or other parts of the tail section. From Wordnik.com. [CNN Transcript Feb 13, 2000] Reference
NTSB engineers say the nut, which works along with the jackscrew to control the stabilizer trim, had severe damage to its threads. From Wordnik.com. [CNN Transcript Feb 12, 2000] Reference
Now, a little more, as you probably know or may recall, they found the jackscrew from the Alaska Airlines flight 261 yesterday, brought it in. From Wordnik.com. [CNN Transcript Feb 10, 2000] Reference
It's where that horizontal stabilizer attaches to that jackscrew, as you just saw in the animation, and that is why it makes it go up and down. From Wordnik.com. [CNN Transcript Feb 10, 2000] Reference
Metallurgists were sent out from Washington to take a look at that jackscrew, because it did have some metal strips and metal filings around it. From Wordnik.com. [CNN Transcript Feb 10, 2000] Reference
This follows the discovery earlier this week in two Alaska Airlines jets of metal strips and filings in the jackscrew assemblies, a part of the horizontal stabilizer. From Wordnik.com. [CNN Transcript Feb 12, 2000] Reference
You can see, this is the jackscrew recovered from Alaska Airlines flight 261, the one that crashed, and you can see what looks like little wires sticking off the side. From Wordnik.com. [CNN Transcript Feb 10, 2000] Reference
But in at least several of the cases that we know of, they have found metal filings in and around that jackscrew assembly and metal powder-like that had worn off of it. From Wordnik.com. [CNN Transcript Feb 12, 2000] Reference
CARL ROCHELLE, CNN CORRESPONDENT: Donna, operators of the of the MD-80 series jetliners were told to run inspections on that jackscrew that they though may have been a problem. From Wordnik.com. [CNN Transcript Feb 10, 2000] Reference
GARVEY: Well, first of all, that air worthiness directive, which was issued and given a 18-month period, focused on a different part of the horizontal stabilizer, not the jackscrew. From Wordnik.com. [CNN Transcript Feb 13, 2000] Reference
They found metal fibers, metal filaments wrapped in and around the jackscrew on one, and on another, where the horizontal stabilizer attaches to it, they actually found a piece of metal curling out of a nut in that area. From Wordnik.com. [CNN Transcript Feb 10, 2000] Reference
We are now told by officials from the National Transportation Safety Board that Alaska Airlines has completed its inspection of its 34 aircraft, but in the process, two aircraft were found to have metal filings or shavings in and around the jackscrew. From Wordnik.com. [CNN Transcript Feb 10, 2000] Reference
And Boeing last evening put out a recommendation with all of the airlines that operate these airlines, almost 2,000 worldwide, roughly 1,100 in the United States that they take a look at this jackscrew assembly and see if they can find any kind of damage in the area. From Wordnik.com. [CNN Transcript Feb 10, 2000] Reference
But we are told by the safety board, at the present time, they don't know if the damage is pre-impact or post-impact, in other words, caused by hitting the water, but they do know that the material that was wrapped around that jackscrew in those places is from the nut. From Wordnik.com. [CNN Transcript Feb 10, 2000] Reference
LEE DICKINSON, FORMER NTSB OFFICIAL: I think the prudent thing for them to do is to examine both the gimbal nut and the jackscrew and look at both of those from both those airplanes and compare that with what we know or what the safety board will be finding from the accident aircraft. From Wordnik.com. [CNN Transcript Feb 12, 2000] Reference
When the jackscrew failed, the stabilizer no longer could keep the plane aloft. From Wordnik.com. [Spokesman.com: Latest stories] Reference
Investigators found a jackscrew in the MD-80's tail had not been lubricated, causing the plane to dive into the ocean. From Wordnik.com. [KOMO - News - Top Stories] Reference
The thread failure was caused by excessive wear resulting from Alaska Airlines insufficient lubrication of the jackscrew assembly. From Wordnik.com. [WN.com - Business News] Reference
In the plane's wreckage, investigators found metal shavings indicating threads on the jackscrew had been stripped, causing the part's failure. From Wordnik.com. [Spokesman.com: Latest stories] Reference
Two years earlier, John Liotine, a lead mechanic at Alaska Airlines 'Oakland facility, had found that the jackscrew on the same aircraft was worn out. From Wordnik.com. [Spokesman.com: Latest stories] Reference
During acceleration to high speed cruise, the spike would unlock at Mach 1.6 and then begin a mechanical (internal jackscrew powered) travel to the rear. From Wordnik.com. [Citizendium, the Citizens' Compendium - Recent changes [en]] Reference
The thread failure was caused by excessive wear resulting from Alaska Airlines's insufficient lubrication of the jackscrew assembly. ". From Wordnik.com. [WN.com - Articles related to Alaska Airlines Announces New Hawaii Flights From Bay Area to Kauai] Reference
The probable cause was stated to be "a loss of airplane pitch control resulting from the in-flight failure of the horizontal stabilizer trim system jackscrew assemblys acme nut threads. From Wordnik.com. [WN.com - Business News] Reference
The probable cause was stated to be "a loss of airplane pitch control resulting from the in-flight failure of the horizontal stabilizer trim system jackscrew assembly's acme nut threads. From Wordnik.com. [WN.com - Articles related to Alaska Airlines Announces New Hawaii Flights From Bay Area to Kauai] Reference
Bring that hydraulic jackscrew over here. From Wordnik.com. [Tom Swift Jr And His Jetmarine]
A short rod used as a lever or handle for turning a jackscrew or a spanner by being inserted loosely in the hole provided for that purpose. http: / / www. websters-dictionary-online.com / to / tommy+bar. html. From Wordnik.com. [British Blogs] Reference
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