BWE-08-031/181

Common issues

• On-load release hook interlock/hydrostatic mechanism malfunction - a known industry-wide weak point on freefall lifeboat release gear
• Engine starting failure after prolonged lay-up (fuel or battery condition)
• Cradle/ramp corrosion affecting free release during launch
• Skid/ramp friction surface degradation
• Hull GRP damage or gelcoat cracking from UV and weather exposure
• Seat belt/restraint degradation
• Engine cooling seawater intake or bilge pump blockage

Inspection checklist

• Function-test the on-load release gear per the manufacturer's procedure and MSC.1/Circ.1206/Rev.1, without a free-fall launch unless the drill schedule requires it
• Inspect the release hook interlock/hydrostatic mechanism for corrosion and free movement
• Start the engine and check cooling water discharge, exhaust and control functions
• Check battery condition and the charging system
• Inspect the hull for cracks, delamination, and check ramp/skid condition
• Check seating, harnesses and restraint systems
• Verify the SOLAS emergency equipment inventory is complete onboard
• Inspect the davit/cradle release mechanism if the boat is also gravity-launchable

Service intervals

Typical wear limits

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

• Release hook interlock/hydrostatic unit components - only genuine parts from the approved release gear manufacturer
• Engine starting battery
• Engine fuel filters
• Engine raw-water pump impeller
• Cradle/skid friction pads

Safety

• On-load release gear has a serious industry safety history (multiple fatal incidents) - follow MSC.1/Circ.1206/Rev.1 maintenance strictly and keep persons out of the boat during release gear testing unless required and risk-assessed
• Free-fall drop hazard - maintain an exclusion zone below the skid during any release gear work
• Confined engine compartment fumes
• GRP hull repair resin/fumes are a health hazard - work in ventilated conditions with proper PPE

Class survey

Subject to SOLAS III/20 annual thorough examination and 5-year dynamic (operational) test. Class specifically reviews on-load release gear maintenance records against MSC.1/Circ.1206/Rev.1, given the sector's safety history with freefall lifeboat release systems.