Issue
Hazard description
TRUCKS EQUIPPED WITH DUAL COMPARTMENT AIR RESERVOIRS. SOME DUAL COMPARTMENT AIR RESERVOIRS WERE INSTALLED WITHOUT A DRAIN VALVE IN BOTH COMPARTMENTS AS REQUIRED BY FEDERAL SAFETY STANDARD 121 - AIR BRAKE SYSTEMS. OMISSION OF THE DRAIN VALVE COULD CAUSE THE AIR RESERVOIR TO FILL WITH WATER CAUSING CONTAMINATION OF VALVES IN THE AIR SYSTEM AND/OR COMPONENT FREEZE UP. THESE CONDITIONS COULD CAUSE MOMENTARY LOSS OF BRAKES AND POSSIBLE VEHICLE CRASH.
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