NHTSA safety investigation
NHTSA Investigation PE87005
Preliminary Evaluation · Mack Trucks, Inc. · SUSPENSION:REAR:SPRINGS:AIR SUSPENSION SYSTEM
An investigation is not a finding that a defect exists.
NHTSA opens an investigation to examine whether a safety defect may exist. An open investigation is not a determination that a defect exists, and many investigations close without a recall. Investigations can, however, lead to one.
What NHTSA is examining
The agency's own description of the inquiry, quoted as published
CROSSMEMBER CRACKING
SUMMARY OF INFORMATION FROM MANUFACTURER:A MANUAL CONTROL VALVE FOR THEAIR SUSPENSION IS MOUNTED ON THE SUBJECT CROSSMEMBER.THE SUBJECT CROSS-MEMBER CAN BE OVERSTRESSED AND FAIL, RESULTING IN IT PROTRUDING ABOVE THETOP OF THE FRAME AND INTERFERING WITH TRAILER CHASSIS COMPONENTS.THISCOULD RESULT IN LOSS OF VEHICLE CONTROL.ADDITIONALLY, IF THE SUBJECTCROSSMEMBER COMPLETELY SEPARATES, THE HEIGHT OF THE SUSPENSION AIR SPRINGSCOULD BE AFFECTED.THE RESULTING LEAN COULD CAUSE AN UNSUSPECTING DRIVERTO LOOSE CONTROL OF THE VEHICLE.ANALYSIS:CONCURRENCE WITH THE MANUFACTURER'S INFORMATION.PROPOSED ACTION:CLOSE THIS PE.MACK SUBMITTED A DEFECT REPORT ONFEBRUARY 2, 1987.CURRENTLY THEY ARE WORKING ON A PERMANENT SOLUTION TOCORRECT THE DEFECT.THE SOLUTION WILL BE ANALYZED WHEN AVAILABLE.===
An investigation is a separate record from a recall and from a manufacturer communication. A manufacturer campaign to repair a safety defect or a failure to meet a federal safety standard.
Investigation details
Identifiers, dates and outcome as recorded by NHTSA
- Action number
- PE87005
- Investigation type
- Preliminary Evaluation (PE)
- Status
- Closed
- Manufacturer
- Mack Trucks, Inc.
- Component
- SUSPENSION:REAR:SPRINGS:AIR SUSPENSION SYSTEM
- Opened
- Nov 7, 1986
- Closed
- Feb 17, 1987
- Associated recall campaign
- 87V010000
Vehicles named in this investigation
6 model years across 1 model
Being named here means NHTSA included the vehicle in the scope of its inquiry. It is not a statement that these vehicles have a defect.