Lifeboat on-load cable release unit defect

Lifeboat on-load cable release unit defect

Initial report

During an annual lifeboat safety inspection it was discovered that the on-load cable release could not easily be moved, and the release lever required extreme force to operate. The forward hook cable release also did not operate properly.

A replacement cable release arrangement was procured locally, and repeated tests were conducted to confirm that it was once again fully operational.

The post-event investigation noted that the company’s shipboard safety operations manual required the lifeboats to be inspected on a weekly and monthly basis. According to the vessel’s logs, the monthly lifeboat inspection had taken place three weeks previously and had included an abandon ship drill during which both lifeboats were unhooked and manoeuvred in the water. However, the poor condition of the lifeboat release system was not documented, and nothing was reported back to the company.

CHIRP Comment

The company’s safety manual provided specific and comprehensive instructions for inspection and testing. If these had been properly implemented, then the defect should have been identified in an earlier inspection.

It is vital that the responsible officer assigned to conduct lifesaving appliance inspections and tests has received the necessary training. A senior officer, usually the Chief Engineer or someone familiar with the equipment, must mentor the officer to ensure that maintenance is carried out in accordance with the manufacturer’s instructions. It is equally incumbent on the company under the ISM Code to ensure that training is sufficient. Procedures issued by manufacturers should be scrutinised for feasibility. For example, the manufacturer of lifeboats and the davits in which they are housed will often be different.  Are these procedures sufficiently coordinated to prevent obstructions to maintenance? If not, the company responsible for compliance with the ISM Code has a duty of care to ensure corrective action.

Since their introduction, on-load and off-load release systems for lifeboats have caused death and serious injury to crew when the operating systems have not been properly checked, maintained, and tested.  The system should be regarded as a single point of failure unless fall preventer devices (FPD) are fitted.


Undertaking maintenance on the lifeboat hooks – the hanging-off strop is rigged along with the fall prevention device (FPD). Once the weight of the boat is taken by the hanging-off strops the hooks can be released. The FPD can remain attached to their shackles.

FPDs were regarded by regulators as an interim measure whilst hook designs were improved. However, they provide a separate and alternative load-path and are easy to rig and unrig. They can be cut in an emergency and provide much needed security for crews who over the years may have understandably lost confidence in the on-load off-load lifeboat release equipment.

MAB comments

Because of previous incidents, when it comes to lifeboat inspections, companies are understandably risk-averse. The situation is not helped by the substantial number of port authorities which do not allow boats to be launched within harbour limits. These factors can lead to a culture of falsifying records to appear to be compliant.

Human factors relating to this report

Capability – Take active steps to identify capability gaps, and address them.

Culture – Your team’s safety culture relies on everyone adhering to it.



Report Ends………………….