They are on-off mircroswitches, the switch completes the
circuit when the strut is compressed to the static ground
position.


--
James H. Macklin
ATP,CFI,A&P

"Marc CYBW" wrote
in message news:fAZmf.251433$ir4.208268@edtnps90...
| But a smooth landing and lowering
| the nose may have been to delicate to trigger the
automatic
| deployment of the systems.
|
|
| My goodness. How sensitive are those gear load sensing
switches?
|
| Marc
|
|
| "Jim Macklin" wrote
in message
| news:lSYmf.22834$QW2.3354@dukeread08...
| Jet Crew: Reverse Thrusters Failed in Chicago
|
| Associated Press
| Sunday, December 11, 2005; A12
|
|
|
| CHICAGO, Dec. 10 -- The reverse thrusters that should
have
| slowed a Southwest Airlines jetliner before it slid off
a
| runway at Midway International Airport and into the
street
| did not immediately kick in when the pilots tried to
deploy
| them, federal investigators said Saturday after
interviewing
| the crew.
|
| How much of a role that braking equipment played in
| Thursday's deadly accident was not immediately clear,
| though, and the investigation is continuing.
|
| The plane's flight attendants told investigators that
the
| Boeing 737 did not appear to slow after it touched down
at
| Midway in a snowstorm Thursday, said Robert Benzon, the
| National Transportation Safety Board's investigator in
| charge.
|
| "They all said it was a smooth landing, but they could
sense
| a lack of deceleration," Benzon said.
|
| He said the pilots told investigators they began
applying
| the brakes manually as soon as they noticed that the
plane
| was not slowing properly. The plane, with 98 passengers
| aboard, slid through a fence and into street traffic,
where
| it killed a 6-year-old boy in a car.
|
| Because of the blowing snow, none of the air traffic
| controllers actually saw the plane land, but more than
10
| cameras could provide additional information.
|
| © 2005 The Washington Post Company
|
|
| Automatic deployment of spoilers and thrust reversers
| depends on compression of the main gear struts and
probably
| also the nose wheel strut. The description of a "smooth
| landing" indicates pilot error in the technique usewd
for
| the landing. If the aircraft was flown on the ILS to
just
| above the surface, a slight flare and a very firm
landing to
| compress the mains, followed by quickly lowering the
nose
| they might have been OK. But a smooth landing and
lowering
| the nose may have been to delicate to trigger the
automatic
| deployment of the systems.
|
|
|
| "Marc CYBW"
wrote
| in message news:cCWmf.145990$S4.8066@edtnps84...
| |
| |
|
http://www.washingtonpost.com/wp-dyn...121001562.html
| |
| |
| |
| | --
| | M. Lattoni
| | Calgary, Canada
| |
| | Skype: marc_lattoni
| | Phone: 403.238.3731
| | eMail:
| |
| |
|
|
|
|