manufacturer and NYK studied and agreed on the same technical standards, and a highly reliable digital governor and electrical remote control system is prepared on all ship's newly built under NYK's control as a standard.
7: Other examples
a. Auxiliary Boiler Forced Draft Fan
On a certain VLCC, the bearing on a forced draft fan of a auxiliary boiler was broken and replaced with a new one during anchorage. It took almost three days for the repair term, and as a result, the customer suffered a delay and many problems, as well we were setback financially. The cause of this trouble is, needless to say lack of maintenance, but after further investigation it was found that the design of the bearing supporting points had been changed from the original four points to two points as revised by the manufacturer without official notice to the shipowner.
It is assumed that this design change was one of the factors that reduced the bearing life under the severe environment on board especially due to vibration.
By using this two point support type, we heard that the production cost was reduced about 30 percent but it seems that little consideration for the balance between reliability and price was given. We recognize the challenging spirit however, we could never agree with the deterioration of reliability.
