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Precis File
SHIP NAME: Charleston KEY: NUM. ENTRIES: 2
source USCG
type A
volume
material
dead
link

Investigation Activity Report: CHARLESTON; Loss of Electrical Power On: 1/11/2007 MISLE Activity Number: 2857418 Originating Unit: Marine Safety Unit Port Arthur MISLE Activity Owner: Commandant (CG-5453) MISLE Activity Controller: Commandant (CG-5453) MISLE Case Number:

The M/V CHARLESTON had a loss of power due to an error in judgment by the Chief Engineer (CE), while trouble shooting the number 3 Ships Service Diesel Generator (SSDG). The vessel has 3 SSDGs. The STBD and CENTER units were online. The CE was investigating the PORT generator auto circuit, preparing to change out a suspected faulty standby generator selector switch. In identifying the start circuit for the PORT SSDG, the under voltage relay was bypassed and the start sequence timer power source was removed to initiate the starting sequence of the PORT unit. The engine started and the PORT generator came up to line voltage. The under voltage relay normally open contacts completed the tripping circuits of the STBD and CENTER units which were online at the time. The CE incorrectly read the electrical schematics interpreting bypassing of the under voltage relay to be sufficient in disrupting the transfer sequence while enabling the starting sequence. The ship lost power momentarily as the auto transfer sequence took place. Under voltage protected equipment came back online automatically as designed and the steering gear repowered. The power source was replaced and the bypass were removed.

On 12JAN07 ABS conducted a Port State Control Survey. The PORT, STBD, and CENTER SSDG were tested by paralleling all 3 simultaneously and monitoring the load sharing capabilities. The Reverse power trips were tested on each of the generators, and showed no adverse affects.


source CTX
type C
volume
material
dead
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The interesting line in the USCG Report is "ABS conducted a Port State Control Survey". The whole rationale for port state control was that the Classification Society/flag state regulatory system was not working. The USCG report writer was probably technically incorrect. The ABS visit was almost certainly paid for by the owner. But the quote clearly shows that USCG has a muddled concept of Port state control.