Pre-Trip Defects at 04:30
You are the driver of a 33,000-pound GVWR straight truck with hydraulic brakes and a vacuum booster. At 04:30, with the temperature at 18°F, you start the pre-trip. You find: left steer tire tread 3/32 inch at two points; right steer 6/32; a 1-inch cut in the left steer sidewall that does not expose cord; the left outer rear dual is flat; the parking brake will not hold the truck on a 5 percent grade at idle; the brake pedal feels spongy and travels halfway to the floor before firming; the left headlight is out; the windshield has a 6-inch crack along the bottom passenger side, below the wiper path; and the driver's side mirror is cracked but usable. The truck is due at a terminal 40 miles away in 2 hours. The shop is 3 miles in the opposite direction and opens at 06:00. You are on duty at 04:30 and have 10 hours of driving available.
1. Sort the findings into out-of-service defects and defects that may not by themselves prohibit operation, and explain the safety reason for each call.
Read the worked answer
Clear out-of-service defects:
- Left steer tire at 3/32 inch: steer tires need at least 4/32 inch tread; below that, wet or icy traction is unsafe.
- Flat left outer rear dual: the remaining tire is overloaded and the truck is unstable.
- Parking brake will not hold on a 5 percent grade: the vehicle can roll away.
- Spongy pedal traveling halfway to the floor: hydraulic brake defect; stopping power may be lost.
- Left headlight out: likely out of service if the lamp is required; visibility and conspicuity are reduced.
May not by themselves prohibit operation:
- The 1-inch sidewall cut that does not expose cord, if there is no bulge or separation.
- The windshield crack below the wiper path and outside the driver's view, if it does not interfere with vision.
- The cracked mirror, if the driver still has a clear view.
2. Can you drive the truck 3 miles to the shop or 40 miles to the terminal? What are your options?
Read the worked answer
No. An out-of-service defect means the vehicle cannot be operated on a public road, even to a shop, unless the defect is repaired or the vehicle is towed. Driving 3 miles or 40 miles with a flat tire, a failed parking brake, and a spongy brake pedal creates an immediate crash risk and is a violation.
Options: call the shop for mobile repair, request a tow, or wait for the shop to open and have a mechanic come to you. Notify dispatch and record the delay. Do not falsify the inspection report or let the delivery schedule override the defect. If the shop cannot repair on site, the truck stays parked.
3. What inspection documentation is required, and what is the carrier's responsibility?
Read the worked answer
The driver must complete a daily vehicle inspection report for the commercial vehicle, list the defects found, and sign and certify the report. Even a report with no defects must be certified. The carrier must review the report, repair the defects, and certify that the repairs were made before the vehicle is operated again.
The driver's responsibility is to refuse to operate an unsafe vehicle and to report the defects accurately. The carrier's responsibility is to act on the report, not just file it. Keeping the report and repair certification protects both the driver and the company and documents why the truck did not leave at 04:30.