United States 96V198000
Blue Bird Body Company
The problem
OVERSIZED ROTORS WERE INSTALLED IN THE POWERTRAIN DRIVE MOTORS IN THESE BUSES.
Risk
WHEN THE BUS IS IN SERVICE AND THE OVERSIZED ROTOR INSIDE THE ELECTRIC POWERTRAIN MOTOR BECOMES HEATED, THE ROTOR EXPANDS CAUSING THE MOTOR TO BECOME SLUGGISH, STALL AND COULD SEIZE, FAILING COMPLETELY.
What owners should do
NORTHRUP-GRUMMAN WILL PERFORM THE MODIFICATION TO THESE POWERTRAIN DRIVE MOTORS.
Units 5