The two CSeries test planes have been grounded since an engine failure which took place in May this year

CSeries deemed safe to fly again after engine failure

Bombardier has resumed flight testing of its new CSeries aircraft following investigation of engine problems in May this year.

The CSeries flight test vehicle two has taken to the sky in Mirabel, Canadian province of Quebec, today after having been grounded in the wake of an incident that took place during stationary testing of its sister aircraft.

"We are pleased to see the CSeries aircraft back in the air. The geared turbofan engine has over 10,000 hours of ground and flight testing and we're confident that it will enter into service meeting or exceeding the fuel burn, emissions, thrust and noise specifications, as promised by Pratt & Whitney," said Rob Dewar, Vice President for the CSeries Aircraft Program at Bombardier.

"Aircraft flight test programmes are complex and involve extreme testing meant to draw out any potential issues and correct them prior to entry-into-service.”

Pratt and Whitney together with Bombardier carried out a thorough review of the Pratt and Whitney engine involved in the incident and implemented measures to address the issue including modification of the engine’s oil lubrication system.

During the May 29 incident, which took place inside the planemaker’s assembly plant in Mirabel, one of the two Pratt & Whitney geared turbofan engines on the CSeries prototype caught fire. Aviation Week later reported the fire was caused by a fault in the engine’s low pressure turbine which led to a sudden loss of power and a subsequent uncontained failure.

Bombarider hopes that with the issue now corrected, CSeries is on schedule for its mid-2015 commercial roll-out.

CSeries is Bombardier’s so far biggest aircraft. Designed to carry 100 to 150 passengers, the single-aisle jet is said to offer 20 per cent lower fuel consumption and 15 per cent lower operating cost compared to currently used aircraft.

Bombardier said it has booked orders and commitments for 513 CSeries aircraft, including 203 firm orders.

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