United States 87V088000
PACCAR Incorporated
The problem
SINGLE CHECK AIR SYSTEM VALVE MAY MALFUNCTION DUE TO CORROSION.
Risk
AIR COULD TRANSFER BETWEEN CIRCUITS OF DUAL AIR BRAKESYSTEM IN EVENT OF FAILURE OF ONE OR THE OTHER CIRCUIT, WHICH COULD CAUSEDEPLETION OF THE ENTIRE AIR SYSTEM.
What owners should do
REPLACE CHECK VALVES, AS NECESSARY.
Units 50