Seagulls may prove to be a
nuisance when they dig into garbage bags left on sidewalks, but they
can pose an even bigger problem for airplanes.
Such was the case
recently in Happy Valley-Goose Bay, where a Cessna Citation 560XL had to
abort its takeoff when it hit four seagulls.
According to a Transport Canada report documented in the Civil Aviation Daily Occurrence Reporting System,
the incident happened Sept. 11. The plane, destined for Buffalo, N.Y.,
and registered in Germany, was 2,000 feet into its takeoff roll when it
hit the birds.
The pilot believed the plane had hit at least one
bird. Marks were found on the cockpit window and the leading edge of the
left wing. It was also determined that gulls were caught in both of the
plane’s engines.
According to Palmer Tibbo, an experienced pilot
based in Gander, birds such as seagulls can create trouble when they
get caught in engines.
“That could cause a potential flameout of the engine,” said Tibbo.
The
speeds reached by planes can make contact with even small birds
problematic during flight, according to Craig Blandford, president of
the Air Canada Pilots Association.
“If you’re flying along at 250
miles an hour and you hit a bird, no matter what size the bird is, it’s
going to leave a dent in your wing or in some part of the airplane,”
said Blandford, who is originally from Springdale and was a member of
the Royal Canadian Air Force for 20 years.
The Transport Canada
report said bird activity was light at Goose Bay Airport that day and
the runway was scanned by air traffic control prior to takeoff.
“The young gulls blend in with the runway, almost (the) same color,” noted the report.
Mechanics
traveled from Chicago to inspect the Cessna. The report did not
specify when the plane was able to depart from Goose Bay.
Tibbo has struck gulls on occasion, but none have ever come in contact with an engine while he’s been flying a plane.
“I did once upon a time flying the air ambulance into St. John’s (have) one hit the windshield,” he recalled.
While birds can cause engine trouble, Blandford said modern planes can often handle them.
“There’s
lots and lots of cases of modern jetliners ingesting birds, spitting
them out the back and incurring no damage whatsoever. However, on a
precautionary basis, if you know you’ve taken a bird, you would come
back and land and have the engine serviced and checked, just to make
sure everything is safe.”
He said it would take a large bird to damage an engine.
“It’s
surprising to learn that frozen chickens and other things are thrown
into engines during some of their testing to make sure they can
survive.”
Birds were responsible for the crash of US Airways
Flight 1549 into the Hudson River in January 2009, an incident that did
not result in any deaths. The plane hit a flock of Canada geese after it
left LaGuardia Airport in New York and lost power before the pilot
managed to land it safely on the river.
In the air, Blandford
said, there are techniques pilots can employ to avoid hitting birds.
Final cruising speed is not reached until 10,000 feet, an altitude at
which birds do not tend to fly. Blandford said propeller airplanes often
employ paint-schemes that make the propellers visible even as they are
spinning.
“Air traffic controllers will also tell you if birds are reported,” he said.
St. John’s International Airport Authority implemented a plan in 2006 to manage gulls on its property.
“I
know St. John’s had a lot of them,” said Tibbo. “They had gulls heading
towards Windsor Lake or wherever they’d go, and we had the same problem
in Gander. In the evening time, you’d get them leaving the local dump
and heading for Gander Lake.”
According to Tibbo, propane is used to create a loud popping noise at Gander International Airport that helps keep birds away.
Source: http://www.lportepilot.ca
CADORS Number:2013A1029
Narrative:
A German
registered Cessna Citation 560XL, was cleared for takeoff on runway 34
at Goose Bay, NL (CYYR) to Buffalo, NY (KBUF). At approximately 2000
feet into the takeoff roll, the aircraft struck 4 gulls. The pilot
aborted the takeoff and taxied back to its servicing agent. The pilot
reported at least one gull struck the windshield. On returning to the
ramp, they observed 2 marks on the cockpit window (no damage), one mark
on the leading edge of the left wing and possible ingestion of gulls
into each engine. The aircraft is now,located in one of the hangars and
mechanics from Chicago are expected in Goose Bay this evening to inspect
the aircraft. Bird activity on the airfield was light for the day,
light bird activity was on the ATIS. The runway was scanned by the tower
controlled prior to issuing takeoff clearance. The young gulls blend in
with the runway, almost same color.