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BC-Plane Into Home, 10th Ld-Writethru,1104
Plane that crashed near Buffalo was on autopilot
Eds: UPDATES with more from NTSB about actions pilot took before
crash; quote from county health commission on victim
identification. AP Video.
With BC-Plane Into Home-Turboprops, BC-Plane Into Home-Town
AP Photo NYRB104, NYRB106, NYRB109, NYRB102
By LARRY NEUMEISTER
Associated Press Writer
BUFFALO, N.Y. (AP) - The commuter plane that crashed near
Buffalo was on autopilot until just before it went down in icy
weather, indicating that the pilot may have ignored federal safety
recommendations and violated the airline's own policy for flying in
such conditions, an investigator said Sunday.
Federal guidelines and the airline's own instructions suggest a
pilot should not engage the autopilot when flying through ice. If
the ice is severe, the company that operated Continental Flight
3407 requires pilots to shut off the autopilot.
"You may be able in a manual mode to sense something sooner
than the autopilot can sense it," said Steve Chealander of the
National Transportation Safety Board, which also recommends that
pilots disengage the autopilot in icy conditions.
Automatic safety devices returned the aircraft to manual control
just before it fell from the sky, Chealander said.
During a Sunday briefing, Chealander described the flight's
frantic last moments, which included a steep drop and
rollercoaster-like pitching and rolling.
Chealander said information from the plane's flight data
recorder indicates that the plane pitched up at an angle of 31
degrees, then pitched down at 45 degrees.
The plane rolled to the left at 46 degrees, then snapped back to
the right at 105 degrees - 15 degrees beyond vertical.
Radar data shows Flight 3407 fell from 1,800 feet above sea
level to 1,000 feet in five seconds, he said. Passengers and crew
would have experienced G-forces up to twice as strong as on the
ground.
The plane crashed belly first onto a house Thursday night,
killing all 49 people on board and one person on the ground.
Just before they went down in a suburban neighborhood near the
Buffalo airport, the pilots discussed "significant" ice buildup
on their wings and windshield. Other aircraft in the area told air
traffic controllers they also experienced icing around the same
time.
The Dash 8 Q400 plane operated by Colgan Air was equipped with a
"stick shaker" mechanism that rattles the yoke to warn the pilot
if the plane is about to lose aerodynamic lift, a condition called
a stall.
When the stick shaker engaged, it would have automatically
turned off the autopilot, Chealander said.
Before that, the pilot switched on an anti-stall device that
increases the speed of the plane by 20 knots and gives a pilot more
margin to recover from a stall if it occurs.
Chealander said the plane's deicing system was turned on 11
minutes after it took off from Newark, N.J., and stayed on for the
entire flight. Indicator lights showed the system appeared to be
working.
He said the pilot was being "very conservative" by turning it
on so soon.
Investigators who examined both engines said they appeared to be
running normally at the time of the crash, too.
In a December safety alert issued by the NTSB, the agency said
pilots in icy conditions should turn off or limit the use of the
autopilot to better "feel" changes in the handling qualities of
the airplane.
Still, Chealander was careful not to criticize the pilot.
"Everything that should have been done was done so we keep
looking," he said. "We keep looking, trying to find out why this
happened."
Colgan Air operates a fleet of 51 regional turboprops for
Continental Connection, United Express and US Airways Express.
Chealander said Colgan, like most airlines, had begun following
NTSB recommendations that pilots use deicing systems as soon as
they enter conditions that might lead to icing.
Federal Aviation Administration spokeswoman Laura Brown said the
agency advises pilots to disengage the autopilot when ice is
accumulating, but the guidance is not mandatory.
She also said some planes are certified to be flown on autopilot
in icing conditions because doing so "may actually keep the
aircraft at a steadier speed and altitude than a pilot could flying
it manually."
Brown said the agency considered making the guidance mandatory,
but others in the aviation community argued against it, citing the
capabilities of such advanced planes.
She did not know if the 74-seat Q400 Bombardier aircraft that
crashed Thursday was certified to be on autopilot during icing
conditions.
By Sunday, authorities had recovered the remains of at least 15
people from the wreckage as crews raced to finish their work before
a storm arrives later in the week.
Recovery crews could need as much as four days to remove the
remains from the site. Chealander described the efforts as an
"excavation."
"Keep in mind, there's an airplane that fell on top of a house,
and they're now intermingled," he said.
DNA and dental records will be used to identify the remains, he
said.
"Whether we can identify everybody or not remains to be seen,
but it will be weeks, the identification process," Erie County
Health Commissioner Anthony Billittier said.
Once all the remains are recovered, the focus will turn to
removing wreckage of the 74-seat aircraft from the neighborhood.
---
Associated Press writers William Kates, Ramit Plushnick-Masti,
Carolyn Thompson and John Curran contributed to this report.
(Copyright 2009 by The Associated Press. All Rights Reserved.)
AP-NY-02-15-09 2024EST
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