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TWINNED AGENT UNIT (TAU-2H) - 14014_339
AIRCRAFT FIRE HAZARDS

Airman - Aviation theories and other practices
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can be vehicle-mounted. The TAU-2H is a self-contained unit with two agent tanks—one containing 86 gallons of AFFF premixed solution and the other containing 200 pounds of Halon 1211. The system permits use of the fire-fighting agents either separately or simultaneously. The TAU-2H (fig. 12-12) employs a noncollapsible dual hose line encased in a fire-resistant cotton jacket. The hose line is normally mounted on a reel. The fire-extinguishing agents are propelled by nitrogen supplied from two pressurized cylinders, which are mounted on the framework. The twinned nozzles on the handline expel the fire-fighting agents. The Halon nozzle is equipped with a low-reaction discharge tip. The AFFF nozzle is equipped with a aspirating tip. Duel pistol grip handles and triggers operate the shutoff valves. Extinguishment is obtained by applying agents in a sweeping motion, using the chemical agent Halon 1211 to gain initial extinguishment, followed by application of AFFF to blanket the combustible liquid and preclude reignition. 12-12 UPPER PROPORTIONING SYSTEM ACCESS TURRET MAIN CONTROL PANEL LIFTING/TIEDOWN PORTABLE HALON BOTTLES (3) HANDLINE HOSE REEL AFFF TANK FILL WATER TANK FILL (QUICK FILL) NURSING CONNECTION RIGHT SIDE ENGINE ACCESS DOOR BATTERIES FILTER ACCESS DOOR TIEDOWNS REAR ENGINE ACCESS DOORS KNEEL PLATE DIESEL ENGINE COMPARTMENT HYDRAULIC TANK FILL (2) EXHAUST ANf1211 Figure 12-11.—A/S32P-25 shipboard fire-fighting and rescue vehicle—major assemblies and components (right side). ANf1212 Figure 12-12.—TAU-2H twinned agent unit.







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