A teenage p-plate driver suffered multiple injuries after he lost control of a tipper-truck and rolled it at Stanwell Park on October 15.

The 19-year-old man was airlifted to St George Hospital with head, arm and leg injuries after being freed the truck.

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The crash prompted NSW Police officers from Traffic Task Force and RMS inspectors from Wetherill Park's Heavy Vehicle Inspection Station to visit the company's headquarters, which are not based in the Illawarra.

They inspected 14 trucks and trailers on November 4.

A Transport for NSW spokeswoman said one major defect and six minor defects were identified, with six vehicles passing without issue.

The notices were for various mechanical and other faults with the brakes, engine mounts, and seat belts.

"NSW Police is considering issuing infringements for the defects," she said.

Traffic Taskforce officers also conducted engine control module downloads, which were found to be compliant.

A NSW Police spokesman said traffic taskforce officers would continue to work with RMS inspectors to attend crash events and conduct compliance operations to ensure that truck and dog combinations, along with other heavy vehicle fleets, were safe when operating on NSW roads.

Roads and Maritime Services works with the freight and heavy transport industry and other government agencies to improve road safety for all road users.

Inspectors undertake compliance checks to ensure trucks are safe and road worthy following crashes and other incidents.

It does this because despite making up only 2.4 per cent of NSW motor vehicle registrations heavy vehicles are involved in about 17 per cent of all road fatalities.

The company is now required to fix the defects.

RMS would not release the name of the company as no charges had been laid yet.