How to write a sample brake system technical condition appraisal letter
1. Accident Overview
At about **hour** on January **, 2005, Wang* *Driving a large diesel truck with Guangdong A·092** license plate, Jiefang brand, along the Changbai Highway from north to south, he reached the entrance of the Hexin Toll Station and hit a pedestrian on the roadside, injuring him to death.
2. Entrusted appraisal matters
Entrusted by the Accident Section of Luyuan Traffic Police Brigade of XX City Traffic Police Detachment, Determine the technical status of the braking system of Jiefang brand diesel truck with Guangdong A·092** license plate.
3. Identification basis
1) Accident scene investigationTranscripts and accident scene survey sketches. 2) The interrogation record of Wang **, the party involved in the accident. 3) Inspection results of the brake system of the accident car.
4. Technical status of automobile braking system
From 15:00 to 16:00 on January 23, 2005, accompanied by accident handling personnel and others, the technical condition of the braking system of the Jiefang brand diesel truck with Guangdong A·092** license plate was inspected. The inspection process and results are as follows: 1) The vehicle has a dual-pipeline air pressure brake system. 2) The rear brake pipe of the car fell off from the brake hose at the tee joint of the rear axle. There was no rust at the place where it fell off, and it had recently fallen off (see attached picture 3). 3) When the indication value of the two air pressure gauges reaches 0.6Mpa, emergency braking is performed on the dry asphalt road, and both the left and right front wheels can lock and slide. The car performs emergency braking at a speed of about 35km/h, and the round-trip braking distance is 15m. 4) When the indication values of the two air pressure gauges reach 0.6Mpa, turn off the engine and the brake system air pressure gradually decreases. The rate of decline is as shown in the table below. Time interval, min22.53.03.23.24.05.0 air pressure value, MPa0.550.500.450.400.350.300.255) The steel pipeline connecting the air compressor to the wet air storage cylinder is fixedly connected with a rubber hose through an iron wire. The air inlet end of the rubber hose is seriously leaking, and you can clearly feel the air flow moving nearby. The outlet end of the rubber hose was loose and could be easily pulled out of the control pipeline. According to the accident scene handlers, the rubber hose had fallen off the steel pipeline at that time. 6) The pipeline from the wet air tank to the two dry air tanks leaks from the pipe joint at the joint of the frame. If you place your hand nearby, you can feel the air flow obviously. 7) After increasing the air pressure of the two dry air storage cylinders to 0.6Mpa, unplug the rubber hose in the middle of the connecting pipe between the air compressor and the wet air storage cylinder. The high-pressure gas in the wet air storage cylinder will continue to leak out from the pipeline gradually. The air pressure in the front and rear dry air storage cylinders indicated by the air pressure gauge gradually decreases, which indicates that the one-way valves of the two dry air storage cylinders are not closed tightly. 8) The parking brake (commonly known as hand brake) handle must be pulled through 9 ratchet teeth to become effective.
5. Conclusion
Guangdong A·092** license plate Jiefang brand diesel large truck service brake system Inspection results and analysis prove that: 1) The rear wheel completely lost its braking effect due to the brake pipe joint falling off.
The above is the relevant content summarized by the editor. If If you have relevant legal consultation or other matters that you don’t understand, you can call the online lawyer on the Legal Savior Network for answers. The lawyer’s professional knowledge can help you.
No comments yet. Say something...