LPU-36 Life Preserver Unit

• The LPU-36 is a life preserver unit used by aircrew members
• It is designed to provide buoyancy and flotation in the event of a water landing or ejection over water

Components

• The LPU-36 consists of two inflatable bladders contained within a single cover
• An automatic inflation system is installed
• A manual inflation system is available as a backup
• The bladders are typically made of a durable, coated fabric resistant to punctures and tears
• CO2 cartridges provide the gas for inflation
• The cover is made of fire-resistant material
• It is designed to be worn comfortably and not interfere with the aircrew's movements inside the cockpit
• Adjustment straps and buckles ensure a snug and secure fit

Automatic Inflation System

• The automatic inflation system is triggered upon immersion in water
• A water-sensitive bobbin dissolves, releasing a spring-loaded firing pin
• The firing pin punctures the CO2 cartridge, releasing the gas into the bladders
• Inflation occurs rapidly, typically within a few seconds

Manual Inflation System

• The manual inflation system consists of pull handles or inflation tubes
• The aircrew member can manually activate the CO2 cartridges by pulling the handles
• This punctures the cartridges and inflates the bladders
• Inflation tubes allow the aircrew member to inflate the bladders orally
• This is useful if the CO2 cartridges fail or if additional buoyancy is needed

Accessories

• The LPU-36 may be equipped with several accessories
• A sea dye marker helps to increase visibility in the water, aiding search and rescue efforts
• A whistle allows the aircrew member to signal for help
• A locator light emits a bright light that can be seen from a distance
• Some versions may include a small survival kit containing essential items like a signaling mirror, first-aid supplies, and a knife
• A spray shield can be attached to the LPU-36 to protect the wearer's face from water spray and wind

Inspection and Maintenance

• Regular inspection and maintenance of the LPU-36 are crucial to ensure its reliability
• Inspections should be performed before each flight to check for any signs of damage or wear
• The CO2 cartridges should be checked to ensure they are properly filled and not expired
• The automatic and manual inflation systems should be tested periodically to verify they are functioning correctly
• Any damaged or worn parts should be replaced immediately by qualified personnel
• Proper storage of the LPU-36 is also important to prevent damage and extend its service life

Donning Procedures

• Aircrew members must be thoroughly trained on how to don and use the LPU-36
• The LPU-36 is typically worn over the flight suit and secured with straps and buckles
• The aircrew member should ensure that the LPU-36 is properly adjusted for a snug and comfortable fit
• The location of the manual inflation handles should be memorized
• The aircrew member should be familiar with the operation of the automatic and manual inflation systems

Usage in Emergency Situations

• In the event of a water landing or ejection over water, the LPU-36 provides critical buoyancy and flotation
• If the automatic inflation system fails, the aircrew member should immediately activate the manual inflation system
• Once the bladders are inflated, the aircrew member should position themselves in a stable floating position
• The aircrew member should use the sea dye marker, whistle, and locator light to signal for help
• If a spray shield is available, it should be deployed to protect the face from water spray and wind
• The aircrew member should remain calm and conserve energy while awaiting rescue