HZ-LJL

Common issues

• On-load release hook mechanism sticking or corroding, delaying or preventing release
• Hydrostatic interlock failing to reset correctly after immersion testing
• Bowsing/frapping line and painter release wear from repeated handling
• GRP hull gelcoat cracking or blistering from UV exposure and repeated free-fall shock loading
• Self-contained diesel engine failing to start after long idle periods between drills
• Skid/ramp friction surfaces wearing unevenly, affecting launch consistency
• Seat belts and shock-absorbing seating degrading, reducing occupant protection on impact
• Hatch and canopy seal leakage letting in water during launch or heavy weather

Inspection checklist

• Visual check of hull for cracks, delamination, or blistering
• On-load release gear function test per LSA Code annual thorough examination
• Hydrostatic interlock operation check
• Skates/ramp condition and lubrication check
• Engine start test and cooling water through-flow check
• Painter and release cable condition check
• Seat belts, headrests, and shock-mitigation seating condition
• Fall preventer device fitted and wire free of corrosion
• Internal fire-protection water spray system pressure/function check, if fitted

Service intervals

Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.

Critical spares

• On-load release hook assembly components
• Hydrostatic release unit (dated replacement)
• Painter release cable/wire
• Engine starting battery
• Hatch and canopy seals/gaskets
• Bowsing tackle line

Safety

• On-load release mechanism must never be adjusted or tested with crew inside unless the approved procedure explicitly allows it
• Free-fall launch carries spinal injury risk if seat belts and shock-absorbing seating are not maintained
• Skid/ramp area presents a crush hazard during launch preparation
• Running the engine with the hatch closed risks exhaust fume buildup in the enclosed boat

Class survey

Freefall lifeboats and their launching appliances are surveyed under SOLAS Ch. III / LSA Code: annual thorough examination plus 5-yearly on-load release gear overhaul and davit/winch proof load test. Service records for the release gear overhaul must be retained on board and produced at survey; the hydrostatic release unit's marked expiry must not be exceeded.