Amtrak (search) said it had canceled service Friday on its Acela Express (search) because of problems with brakes on the high-speed trains that carry passengers between Washington, New York and Boston.

Cracks were found in brake components on most coaches of the trains during routine inspections, Amtrak said in a statement, adding that no brake failures or other safety problems had occurred.

Most other Amtrak service was scheduled to operate normally. Amtrak said its Metroliner service will operate Friday, with the exception of train No. 102, the 10:00 a.m. departure from Washington to New York, which was also canceled.

Amtrak normally runs 15 Acela weekday roundtrips between New York and Washington and 11 between New York and Boston.

The express trains will remain out of service until the brake problems are fixed.

Amtrak said Acela accounts for about 20 percent of its Boston-New York-Washington weekday service.