Here is the latest Class News from Lloyd's Register Marine.. View in browser
logo Class News No. 16/2014

8 May, 2014
Safety Alert: Jiangsu Jiaoyan Marine Equipment Company – JX-4 lifeboat hook device and release mechanisms and JYF55 launching devices
Applicability: All owners, operators and personnel involved in maintaining and surveying vessels which have JX-4 lifeboat hook device and release mechanisms and JYF55 launching devices


The Australian Transport Safety Bureau (ATSB) has released a Safety Report containing the results of their initial investigation into a recent incident when a freefall lifeboat was unintentionally released. The investigation is ongoing and a final report containing recommendations will be issued and will be the subject of a further Class News. The report highlights the risk of release mechanisms being incorrectly reset following use or testing.

Initial findings
The Safety Report has identified that the JX-4 release mechanism, particularly the hydraulic hook release ram, did not always fully retract after use. If the ram is not fully retracted after use it may take significantly less cycles of the hydraulic hand pump to operate the hook release mechanism (four pumps rather than 12), which may lead to the lifeboat being released inadvertently or sooner than expected.

The system allows for the testing of the release mechanism at sea, without launching the lifeboat, by attaching ‘simulation wires’ through the aft quarters of the lifeboat. The simulation wires allow the hook mechanism to operate, release the lifeboat and then allow the lifeboat to travel approximately 150mm along the ramp, proving that the lifeboat will deploy. During the incident, the simulation wires failed at a load significantly below their rated safe working load. The cause of this premature failure has yet to be determined.

LR recommends that owners review their training and operating procedures to ensure that:

  • all crew members and maintainers are aware of the need to ensure that hydraulic hook release rams are fully retracted after the system has been operated, and
  • safety procedures are reviewed to reduce the risk to personnel if an inadvertent lifeboat release occurs.

Owners should study the recommendations of the final ATSB report when it is released.

For further information

Speak to one of our experts at your local Lloyd's Register Group office. Or contact us via:
+44 (0)2380 249639


Follow on Twitter | Like on Facebook| Follow on Linked In | Forward to a friend

Lloyd’s Register and variants of it are trading names of Lloyd’s Register Group Limited, its subsidiaries and affiliates. Copyright © Lloyd’s Register Group Limited. 2014. A member of the Lloyd’s Register group.

Lloyd’s Register Group Limited, its subsidiaries and affiliates and their respective officers, employees or agents are, individually and collectively, referred to in this clause as ‘Lloyd’s Register’. Lloyd’s Register assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant Lloyd’s Register entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract.

Unsubscribe from this list | Update subscription preferences | Privacy policy