Ottawa, Canada - Transport Canada issued an airworthiness directive ordering Airbus A220 operators to inspect the fuel feed tubes of the aircraft that can be worn out by a clamp.
According to an Airbus A220 airworthiness directive issued by Transport Canada on May 13, the fuel flowing to engines could be blocked due to fuel tubes eroded by a clamp.
The directive says that operators have reported damages on multiple aircraft caused by bonding clamps that are touching the tubes.
"In one incident, the wear damage ultimately led to a hole in the main engine feed tube located in the collector tank, resulting in fuel imbalance during flight,” Transport Canada said.
"Worst-case, such wear could cut fuel flow to the engines," the Agency added.
Transport Canada mandated Airbus A220 operators to inspect right and left fuel feed tubes within 1,800 flight hours. The directive also requires constant checks every 1,800 hours.
The CSeries single-aisle jets of the Bombardier was re-branded as A220 after Canadian aircraft manufacturer sold a majority stake in the program to Airbus.
Canadian airlines don't operate the A220s yet, but the directive is likely to be adopted by other country regulators, where the planes are in active service.
There are currently 68 Airbus A220 in service around the world, mostly in Europe.