• 2021 May 3 12:57

    NTSB says maintenance error caused $2.2M marine accident with Canadian-flagged ship

    NTSB investigators traced the problem back to a small set screw that was installed in a piece of the controllable pitch propeller machinery that controlled pitch.

    The incorrect installation of a single set screw led to the loss of propulsion control on the Canadian-flagged, 736-foot-long Atlantic Huron, causing the ship to strike a pier at 6.8 knots, the National Transportation Safety Board said.

    Marine Accident Brief 21/10 is the NTSB report on the July 5, 2020, contact between the self-unloading bulk carrier and a pier associated with the Soo Locks, in Sault Sainte Marie, Michigan, resulting in $2.2 million in damage. There were no injuries.

    While on approach to the locks and attempting to slow, there was a propulsion problem involving the vessel’s controllable pitch propeller system that resulted in the ship moving forward with increasing speed instead of slowing or moving astern, as ordered by the captain. In a controllable pitch propeller, the blades are not fixed in position but are fastened to the hub in a way that allows them to rotate and thereby change pitch. The blade pitch determines both the vessel’s speed and its direction.

    NTSB investigators traced the problem back to a small set screw that was installed in a piece of the controllable pitch propeller machinery that controlled pitch. Vessel maintenance records show the set screw was last removed and reinstalled during a shipyard period more than four years before the accident. When the set screw was examined post-accident, technicians found no evidence that any manufacturer-required thread-locking fluid had been applied. As a result, the set screw was able to back out, beginning a sequence of mechanical failures that resulted in the ship moving ahead when it was supposed to be doing the opposite, while still indicating an astern pitch on the ship’s bridge.




2021 June 19

15:37 BIMCO welcomes updated IMO Compendium to advance electronic data
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2021 June 18

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16:47 Acceptance/delivery certificate signed for non-self-propelled suction hopper dredger of Project 4395 built for Kama Basin
16:14 BIMCO publishes new standalone Refund Guarantee for Shipbuilding Contracts
15:51 FESCO opened seasonal transportation to the ports of Chukotka
15:30 CMA CGM to enhance its BSMAR service connecting Black Sea & Turkey with Morocco
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14:53 Multipurpose Reloading Complex puts into operation two new 5-cbm clamshell buckets
14:17 Singapore: Seven start-up grant recipients announced at launch of Smart Port Challenge 2021
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13:21 GLDD agrees to $1 million fine
12:59 Rosatomflot organized icebreaker escorting of LNG carrier Nikolay Urvantsev
12:54 Stena RoRo takes delivery of the lengthened vessel Stena Scandica from the Turkish shipyard
12:30 CMA CGM announces Overweight Surcharge from Asia to North Europe
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2021 June 17

18:37 PD Ports commended with top ‘Gold’ award for ongoing commitment to health and safety
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17:40 Trials of innovative smart navigation marker at Stockholm Norvik Port
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16:50 KARMOL's first Floating Storage and Regasification Unit has arrived in Dakar
16:48 GTT entrusted by Hyundai Heavy Industries with the tank design for four new LNG carriers
16:18 HEMEXPO President appointed as Vice-Chair of SEA Europe
15:13 10 consecutive months of positive year-over-year growth in Savannah
14:52 Grigory Zhelokovich appointed as General Director of Astrakhan Ship Repair Yard
14:33 Royal IHC carries out maintenance work for DMI on LCF frigates
14:13 On-shore power plant at Kiel's Ostseekai inaugurated
13:54 Volga Shipping Company completes transportation of equipment for windfarm under construction in Kazakhstan
13:33 MARINE INTERIORS, Cruise & Ferry Global Expo, powered by SMM 2021 cancelled
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11:30 Global Ship Lease announces agreement to acquire four ultra-high reefer containerships on multi-year charters
11:02 Konecranes launches new generation of energy-efficient mobile harbor cranes as global trade accelerates
10:57 Port of Salalah ranked 6th globally in efficiency
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09:53 Port of Riga sees timber handling growth
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