SEATTLE -- Horizon Air canceled more than 100 flights Wednesday and said more cancellations would occur on Thursday and Friday as it works to inspect turboprop planes after Bombardier Inc. ordered the grounding of all Q-400 planes with at least 10,000 flights.

"They have strongly recommended that we not operate some of our Q-400s until inspections can be completed on them," said Horizon Air spokesman Dan Russo. "So we are taking that very seriously."

Sea-Tac Airport is one of Horizon's main hubs, and Russo said many flights in and out of Sea-Tac were cancelled. He said the company would be offering refunds to passengers.

Horizon, a subsidiary of Seattle-based Alaska Air Group, could not immediately say how many passengers were affected or how long the planes would be out of service.

Horizon says it has not had any problems like the ones in Europe, and that the checks are a precaution for planes with higher flight hours.

As of mid-afternoon Wednesday, the airline had not been able to begin inspections because it was waiting for a directive from the Federal Aviation Administration, Horizon spokesman Allen Weymiller said. It was "very likely" that a comparable number of Horizon flights would be canceled on Thursday, he said.

Aircraft maker Bombardier asked that all of its Q-400 turboprop planes with at least 10,000 flights be grounded immediately after a Scandinavian Airlines aircraft skidded off a runway with 52 people aboard Wednesday, the second such incident in three days.

No one was injured when the landing gear failed, forcing an emergency touchdown down in Lithuania. However, the incident follows a Scandinavian Airlines crash-landing Sunday in Denmark because of a similar problem. Five people were slightly injured in that incident.

"Bombardier has delivered more than 160 Q400 aircraft to airlines around the world, of these there are currently about 60 Q400 aircraft with more than 10,000 landing-gear cycles," the company said in a statement.

It said it had dispatched a representative to assist Lithuanian authorities, saying "Bombardier cannot speculate or comment as to the cause of these incidents."

SAS grounded its 27 Bombardier turboprops of the same make and Austrian Airlines Group said it would not fly the eight it owns, pending inspection.

On Wednesday, SAS pilots attempted to land the 80-passenger plane at Vilnius airport on its front and left landing gear when the right set of wheels failed to extend, authorities said.

Passengers were ordered to move to the left side of the plane as it approached the runway for fear that the right propeller might shred upon landing and send shards through the right side of the cabin, said Kestutis Auryla, head of the Lithuanian Civil Aviation Administration.

The right wing struck the ground, causing a shower of sparks but no fire, he said.

The Q400 turboprop eventually came to a stop in a patch of grass next to the airport's main landing strip after turning 90 degrees. All 48 passengers and four crew were evacuated safely, he said.

An SAS, turboprop carrying 73 people caught fire Sunday after its right landing gear collapsed during an emergency landing at Aalborg's airport in western Denmark. Five people were hurt during the evacuation.

Bombardier recommended that all operators of Q400 turboprops that have accumulated more than 10,000 landing-gear cycles - comprising one takeoff and one landing - ground their planes for inspection.

"We decided to go ahead and to inform all our operators that there was a problem and that they should inspect all aircraft with more than 10,000 cycles as a precautionary measure," Bombardier spokesman Marc Duchesne said. "We believe our aircraft are absolutely safe and reliable."

U.S. and Canadian aviation regulators recently ordered Montreal-based Bombardier to address wing malfunctions on certain jets flown by regional carriers in North America.

The U.S. Federal Aviation Administration's directive, which went into effect Sept. 5, covers 684 airplanes in the U.S. fleet that were built by Bombardier and used by carriers such as Air Wisconsin and SkyWest Inc.

The airplanes have experienced flap failures over several years, according to Transport Canada, which issued its own safety order affecting 87 jets last month.