Bow Thruster Dismantling & Inspection Update - [Vessel Name]

Dear Mr. Zhang,

Good evening.

Further to our previous communication, we would like to provide you with an update on the current situation:

1. On July 29, 2023, our surveyor visited the shipyard to oversee the dismantling of the bow thruster. The dismantling process was successfully completed on the same day. Our surveyor conducted a thorough inspection of every component of the bow thruster and documented the following observations:

2. In addition to the previously mentioned blade bending and dents on July 28, we also discovered noticeable scratches on the contact surface between the blade root and the hub. As a result, the blades were sent to the mechanical workshop for repair.

3. During and after the dismantling of the propeller shaft, we noted scratches on two sleeves. One sleeve was transferred to the mechanical workshop in the shipyard for repair, while the other one was replaced.

4. The bearing house, crosshead piston, sliding blocks, oil tube, and vertical shaft oil seal were observed to have a dark color. According to the manufacturer's advice, this dark color may be a result of exposure to sea water.

5. Some rust was observed on the feed ring and gear case, which may have been caused by exposure to sea water.

6. The parts that were potentially affected by sea water (as mentioned in points 4 and 5) were cleaned with thinner, following the same procedure as the other parts of the bow thruster. Based on the information provided by the manufacturer and our experience, we believe that this cleaning process will not affect the safe use of the bow thruster.

7. A PT on the shaft was conducted on July 29, and the results were satisfactory.

8. As per the manufacturer's advice, the following spare parts will be renewed: sliding piece, one sleeve, O-rings, gasket, back up ring, oil seal, four sliding blocks, locking plate, rung spacer, locking wires, spacer ring, plugs, shim, and seven sleeves.

9. We regret to inform you that the crew members are currently refusing to cooperate with our inspection and have failed to provide the necessary documents.

10. The assembly of the bow thruster is scheduled to take place on July 30, 2023. If all goes well, the dry-docking of the vessel will be completed by August 4.

We will prioritize the preparation of the survey report and provide it to you as soon as possible. Thank you for your understanding and cooperation.

Best regards,

[Your Name]