Passenger Trains > Return of the Acela

The New York Times article cited in the thread titled "Once again labor costs dog AMTRAK" also mentions that the cause of the Acela disk failure is now understood, a "previously unknown phenomenon [now] called bending out of plane", and a "simple solution" will help return the trains to serrvice.

Excerpted from the Boston Globe is the following additional info on return to service.

....."[AMTRAK spokesperson R. Clifford] Black said a possible scenario is that up to four of the 20 Acela trains could be outfitted with the new brakes and start runs between Boston, New York, and Washington on a limited schedule by next month.

"All 20 Acela trains likely won't be back in service until the fall, Black said."

The problem with the ACELA trainsets was the brake rotors. Now my question is, do the HHP8's have similar problems or are they a different design?