Challenger Crashe at TEB

Thanks for the clarification. All the ones I have flown are cable actuated
and they of course have gust locks. Even so, one of our Lears had the
rudder stops beat up when a Falcon parked right behind us blew our rudder
around, even with the gust lock installed. Ouch.


I know the feeling. I am completing a G-550 for a client. A couple
of months ago they pushed it out of the paint hangar. The spoiler
boards were disconnected from their actuators so they could paint
under them. An airliner coming off of the gate swung around and blew
the boards open damaging them and the panels forward of the boards.
Big ouch!!!

Large transport aircraft either restrict or stop the hydraulic flow to
and from the actuators with pressure off so they don't need any other
locks.

"Don Hammer" wrote in message
...

Large transport aircraft either restrict or stop the hydraulic flow to
and from the actuators with pressure off so they don't need any other
locks.

As the late Johnny Carson would say, "I didn't know that."

Any insight on what may cause the Challenger to be unable to unstick?

Any insight on what may cause the Challenger to be unable to unstick?


The way the Challenger is built, you can pull a handle on the console
and split the elevators. That way each side has an elevator. Its use
is for an in-flight jam. Of course, on the takeoff roll there
wouldn't be time to split them and talk about it.

You have two twin actuators receiving pressure from two systems so
loss of a single system wouldn't change anything. With a loss of both
systems, you still have manual control if you pull hard enough. Any
hydraulic failure would be preceded by lots of cockpit warnings. All
that said, I don't think hydraulic failure comes in to play. I guess
there is an outside chance of a bad actuator locking things up.

My initial thought is moisture physically froze something and the
controls didn't get checked prior to takeoff. We always exercised the
controls after we had hydraulic pressure. It also weighs heavily on
my mind that even though both pilots had a lot of time, neither had
much time in type. The Challengers are great aircraft, but they are
certainly a different animal.

I'm sure the NTSB will get it all sorted out in the end.

Don Hammer wrote:

Any insight on what may cause the Challenger to be unable to unstick?

Avweb has reported that the pilots stated to investigators in this crash
and the last Challenger crash a few months ago in Colorado that they
were unable to pull the stick back during takeoff.

"Newps" wrote in message
...

Don Hammer wrote:

Any insight on what may cause the Challenger to be unable to unstick?

Avweb has reported that the pilots stated to investigators in this crash
and the last Challenger crash a few months ago in Colorado that they were
unable to pull the stick back during takeoff.

Hmm. But they were able to do so when performing the flight controls free
and correct checklist item?

The bull****ometer is starting to peg here....

Any insight on what may cause the Challenger to be unable to unstick?

Avweb has reported that the pilots stated to investigators in this crash
and the last Challenger crash a few months ago in Colorado that they
were
unable to pull the stick back during takeoff.

Hmm. But they were able to do so when performing the flight controls free
and correct checklist item?

The bull****ometer is starting to peg here....

So, after reaching v1 and not being able to rotate, they just looked at each
other and lit up a cig and crashed, is that it? I think it was probably a
little more complicated than that.