Bombardier Aerospace claims “industry leading” extended maintenance intervals for its CSeries narrowbody family of commercial jets, the first of which is slated for certification and first delivery in July 2014.

The OEM has extended the line check interval from 750 to 850 hr., and has increased the base maintenance—C Check—period from 7,500 to 8,500 hr. It took these actions based on recommendations from a Maintenance Steering Group 3 (MSG-3), established for the CSeries in 2010.

Major structural inspections are to occur at 12 years, based on 2,500 annual flight hours.

“The MSG-3 group concluded that Bombardier could exceed its initial interval estimates, and based on what we see from our competition, we think that these numbers are industry leading,” says Bill Molloy, director, customer services and support-CSeries, at Bombardier Customer Services in Montreal.

Molloy cites the Airbus A319, A320 and Boeing 737-700 as the principal competitors for the CSeries, which will include the 110-125 seat CS100 and the 135-160 seat CS300.

“The design and system integration was conceived with the idea of requiring less maintenance tasks,” notes Molloy. “Along with a newly designed airframe, we are incorporating a mix of new technology, with existing components with a proven low-risk track record.”

The CSeries also uses an aluminum-lithium alloy, with an improved protective coating. Composites—which are used for the wings, aft fuselage, vertical and horizontal tail structures—also are designed to enhance maintainability.