Challenger Crashe at TEB

quoted from
shorter link is: http://makeashorterlink.com/?R2023496A

Pilot pins jet crash on failed controller
Tells investigators cockpit wheel stuck
Saturday, February 05, 2005
BY ANA M. ALAYA
Star-Ledger Staff

The pilot of a corporate jet that sped off a runway at Teterboro Airport
and smashed into a warehouse told investigators yesterday that the
control wheel malfunctioned, forcing him to abruptly abort takeoff.

But the 58-year-old veteran pilot slammed on the brakes and slowed the
plane from 176 mph to 104 mph in 10 seconds, which one aviation expert
said made the crash "survivable." He also steered the plane to a less
crowded area of Route 46.
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"He hit the brakes so hard he has bruises all over his feet," said
Michael A. Moulis, a lawyer for pilot John Kimberling and Platinum Jet
Management, the company that was operating the Bombardier CL-600
Challenger that rammed into a clothing warehouse Wednesday, injuring 20.

The plane, carrying eight passengers, careened down a 6,000-foot runway,
crashed through a fence and slid across busy Route 46, hitting two cars
before smacking into the garage door of the warehouse and bursting into
flames.

Federal investigators, while declining to pinpoint a control wheel
malfunction as the cause of the crash so early in their probe, said they
are examining the cockpit controls and other mechanical issues after a
90-minute interview with the pilot yesterday.

"The pilot stated that the flight was uneventful until the moment of
liftoff," Debbie Hersman, a spokeswoman for the National Transportation
Safety Board, said at a news conference yesterday.

"He got only one inch of movement from the yoke (the control wheel),"
Hersman said. "He hit the brakes and the thrust reversers ... and tried
to identify a path to steer it to."

Normally a pilot needs to move the control wheel, or yoke, three or four
inches back toward himself to sufficiently raise the nose of the plane
for takeoff, Hersman said.

"He told our investigators he didn't get the response he needed,"
Hersman said.

The pilot's account was consistent with some information retrieved from
the flight data recorder, the cockpit voice recorder, and video footage
of the aircraft on the runway taken from an airport security camera,
according to Hersman.

Investigators still need to interview the co-pilot, Carlos W.
Salaverria, 31, of Miramar, Fla., several more passengers and several
more airport ground workers.

Both pilots are being treated at the Hackensack University Medical
Center. Each suffered a broken leg in the crash.

A lawyer for Salaverria said his client, a married father of two, was
heavily sedated yesterday and would have to undergo surgery tomorrow for
serious wounds to his lower body, and was suffering from post-traumatic
stress. The lawyer said he didn't know when Salaverria could talk to
officials.

"Based on what I heard, the pilot and co-pilot are on the same exact
page," said Manuel Epelbaum, a Miami personal injury lawyer. "Carlos is
going to give the same scenario as the pilot. It was some kind of
mechanical failure on the plane."

Epelbaum said that when the control jammed, Salaverria helped the pilot
pull back on it and employ the thrust reversers to slow the plane.

"If anything, these two guys were heroes. I think the pilot, co-pilot
and crew were heroic in that there was no loss of life. They maintained
control of the plane after an abort, didn't spin off, break the landing
gear or explode."

Moulis said both pilots "pulled and pulled and pulled," on the control
wheel at the point they should have taken off, "but it wouldn't go and
they realized the plane wasn't going to get off the ground."

After the crash, Kimberling crawled on his hands and knees with a broken
leg, touching every seat in the aircraft to make sure no one was left
inside, his lawyer said.

"He keeps asking, did I hurt anybody?" Moulis said.

A woman described as a cabin aide, Angelica Calad-Gomez, helped
passengers out of the plane. "She was a real hero. She was soaked in
fuel and kept going back to make sure everyone was off the plane,"
Moulis said.

According to FAA records, Kimberling has logged 15,805 flight hours and
is licensed to fly five different kinds of jets. Salaverria has logged
4,800 flight hours and is licensed to fly one type of jet. Records show
neither pilot has ever been disciplined.

The NTSB has requested maintenance records for the airplane from
Platinum in Fort Lauderdale to determine if the plane has a history of
problems with the control wheel, Hersman said.

The plane involved in the crash was originally used by the Canadian
military in the 1980s, is one of the original and oldest of the
Challenger jets manufactured and has 6,800 flight hours and 4,300
take-offs and landings, according to the NTSB.

Investigators are also struggling to decode the flight data recorder
information and determine why it only recorded 10 seconds of the 43
seconds from the time the plane revved up to impact. The information
gleaned so far shows the plane was going 176 mph when the recorder was
switched on, and 104 mph when it was turned off, sometime after the
aborted takeoff.

The rapid deceleration likely saved lives, said Jack Olcott, president
of the New Jersey Aviation Association.

"The slower the airplane, the less energy needs to be absorbed in the
accident," Olcott said. "He was able to slow the plane down and to
create a survivable accident."

One of the most seriously injured victims, James Dinnall, 66, of
Paterson, who was riding in a car struck by the plane as it skidded
across Route 46, remained in critical condition at Hackensack University
Medical Center.

The NTSB has found no evidence that ice was present on the plane when it
crashed. A preliminary review of video footage that shows the airplane
on the runway showed there was no signs of frost on the windshield when
the plane took off, according to Hersman.

Aardvark wrote:
....
The pilot of a corporate jet that sped off a runway at Teterboro Airport
and smashed into a warehouse told investigators yesterday that the
control wheel malfunctioned, forcing him to abruptly abort takeoff.
....

Don't turbine aircraft POH's require sufficient runway length to stop
after an abort?

In article , Doug Carter wrote:
Aardvark wrote:
...
The pilot of a corporate jet that sped off a runway at Teterboro Airport
and smashed into a warehouse told investigators yesterday that the
control wheel malfunctioned, forcing him to abruptly abort takeoff.
...

Don't turbine aircraft POH's require sufficient runway length to stop
after an abort?

Quoted figure for highest speed achieved was 174 MPH, or about 150 knots.

For a plane that small, I'm guessing they were above V1; in which case,
bets for coming to a full stop on remaining runway is pretty much off.

I'm not sure what the Challenger V1 for that weight was, but I can't
imagine it being much higher than 125 knots or so.

Though, I'll grant, they were nearly fully loaded with passengers (but
perhaps not significant cargo if they were business execs on a 'day
trip').

I haven't heard of a V1 that high in a long time except for certain
extreme high performance jets. (SR-71, Concorde?)

So in my mind, it seems more probable that the Challenger was already
past V1 at time of abort.

Idle speculation, though, and I'd appreciate corrections from anyone
whom knows that plane.

-Dan

Runways are selected to assure the ability to accelerate to V1 and then stop with maximum braking. You are committed to
fly passing V1, but that assumes that the plane will fly. Quite often Vr is faster than V1...

Blueskies wrote:

Runways are selected to assure the ability to accelerate to V1 and then stop with maximum braking.

Isn't it the other way round: The runway length defines v1?

Stefan

"Stefan" wrote in message ...
Blueskies wrote:

Runways are selected to assure the ability to accelerate to V1 and then stop with maximum braking.

Isn't it the other way round: The runway length defines v1?

Stefan

Well, yea, gross takeoff weight and density altitude, etc control define V1, so you could look at a runway then decide
the max weight allowable for that day. You need to be sure that the runway is long enough to accel to V1 then stop...

Blueskies wrote:

Quite often Vr is faster than V1...

Knowing this, but being only SE rated, I've a question:

It seems that certain problems become apparent only at Vr. So why not use
that as the "size of runway/weight of aircraft" factor?


I'm also curious as to whether the aircraft in this accident gets the same
type of runup as do the little Cessnas I fly. One part of this is always
pulling the yoke back and confirming elevator movement (in the proper
direction).

- Andrew

"Blueskies" wrote in message
m...

Quite often Vr is faster than V1...

By definition Vr is never less than V1.

"Doug Carter" wrote in message
om...

Don't turbine aircraft POH's require sufficient runway length to stop
after an abort?

Yes, but an abort is predicated prior to or at V1 (takeoff decision speed),
not after the higher Vr (rotate speed).