CERTAIN MY 2002-2005 THOMAS BUILT SAF-T-LINER ER SCHOOL BUSES AND ER TRANSIT BUSES MANUFACTURED BETWEEN NOVEMBER 2002 AND FEBRUARY 2005 AND EQUIPPED WITH JOHN DEERE 8.1L COMPRESSED NATURAL GAS ENGINES MODELS HFN01 AND HFN03. THE ENGINE CONTROL UNIT AND THROTTLE CAN UNEXPECTEDLY SURGE. THESE UNITS FAIL TO CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 124, ACCELERATOR CONTROL SYSTEMS.

Consequence & remedy

Consequence: A SUDDEN ENGINE SURGE COULD POSSIBLY RESULT IN A VEHICLE CRASH.

Remedy: JOHN DEERE WILL NOTIFY THE CUSTOMERS OF FREIGHTLINER/THOMAS BUILT AND WILL UPDATE THE ENGINE CONTROL UNIT SOFTWARE FREE OF CHARGE. OWNERS MAY CONTACT JOHN DEERE AT 1-800-JD-ENGINE.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

PE07054 · Emergency Door Handle Failure

Opened Nov 9, 2007 · Closed Mar 4, 2008

Status: closed (inferred from source dates) · Structure:body:door:hinge And Attachments

THE OFFICE OF DEFECTS INVESTIGATION OPENED THIS PRELIMINARY EVALUATIONAFTERBECOMING AWARE THAT FLEETS WERE HAVING HANDLE FAILURES ON THE REAR EMERGENCY DOOR EXIT.THE FAILURE RESULTED IN THE DOOR HANDLE SEPARATING FROM THEDOOR LATCH MECHANISM.WHEN THE HANDLE FAILS, THE REAR EMERGENCY EXIT DOOR CAN NOT BE OPENED FROM OUTSIDE THE BUS.THE FAILURE RESULTS FROM CORROSION OF THE EXTERIOR DOOR HANDLE AROUND THE SECURING ROLL PIN AND SQUARE DRIVE LATCH MECHANISM, CAUSING THE PROTECTIVE FINISH TO CHIP AND FLAKE.CONTINUED CORROSION WEAKENS THE HANDLE AND EVENTUALLY THE HANDLE MAY BREAK WHILE TRYING TO OPEN THE EXIT DOOR.ODI WAS CONCERNED THAT DURING AN EMERGENCY, A PERSON OUTSIDE OF THE BUS WOULD BREAK THE DOOR HANDLE WHILE TRYING TO OPEN THE EMERGENCY EXIT DOOR,POTENTIALLY DELAYING EVACUATION OF THE BUS.UNDER THE SAFETY RECALL, THE ALUMINUM HANDLES WILL BE REPLACED WITH A MORE ROBUST HANDLE.THE RECALL ACTION RESOLVES THE ISSUES RAISED BY THIS INVESTIGATION. ACCORDINGLY, THIS INVESTIGATION IS CLOSED.