dfwairport.com - HRET Considerations
Thu, Mar. 07, 2019

HRET Considerations

 

NFPA 414 describes HRET as an elevated boom or booms designed to deliver large amounts of agent. FAA research has shown fighting fire with an HRET in a down-in-front low attack position as compared to a roof turret on a P-19 apparatus extinguished a fuel fire 53% faster and used 400% less agent. Agent delivery from a turret with discharge rates of 500 – 1000 gpm was more precise, aimed at the base of the fire, and was not as susceptible to wind and plumes of smoke carrying away agent. Position the apparatus at the nose or the tail of the aircraft, depending on wind direction, and agent can be delivered under the fuselage, at an engine or APU, a wheel assembly or simply utilizing the 60 degree rotation left and right to extinguish a pool of fuel without having to reposition the apparatus.  

HRET may also include a piercing nozzle option of various lengths, depending on needs. They are designed to make quick and aggressive attacks on aircraft interior fires on both passenger and cargo aircraft. Utilizing a piercing nozzle to deliver agent at 250 gpm reduced interior temperatures from 1500 degrees F to 250 degrees F.

Things to Remember:
  • Pierce passenger aircraft 10 - 12 inches above the window. This positions the nozzle below the luggage bins and above the seat backs.  
  • Pushing in windows with the piercing nozzle, although easy, works great for ventilation but not so good for firefighting. Seat backs can block up to 25-50% of agent delivery.
  • Cargo aircraft rule of thumb: utilizing the hands of a clock, penetrate at the 10 o’clock, 2 o’clock, 8 o’clock and 4 o’clock positions. These positions give you the best chance of penetrating through the skin of the aircraft and into a unit load device (ULD).
  • Combi-aircraft (passenger/cargo aircraft conversions): penetrate 24 inches above the blacked-out window rivet line.
  • Remove the piercing tip and the HRET can be used for standpipe operations. Thread patterns can accept 1 ½” – 1 ¾” handlines. Choose the entry point carefully. Standpipe operations at a door render that access point unavailable for emergency evacuations.
Training Tips:

Make training fun. Training should be documented. If it’s not documented, it didn’t happen. Training should build the operators confidence toward certification/recertification. As per FAA A/C 5210-23, operators are required to recertify annually every 12 consecutive months. Training should include:

  • Operations at low/mid/high attack positions.
  • Pump and roll operations utilizing the turret.
  • Standoff distance (distance from apparatus bumper and aircraft fuselage) and piercing at different heights.
  • Operating backup controls to stow the boom in the event of system failure.
  • Recognizing abnormal heat signatures and utilizing Infra-Red technology to identify fire location.

High Reach Extendable Turret (HRET) is a very versatile tool if used correctly. Training needs to go beyond just being able to operate the controls. DFW FTRC offers a 3-day comprehensive course beginning with HRET basic operations and focusing on tactics and strategies. We have several mockups to train on, ranging from PAST device, 727 Cargo, 727 SAFT, and A-380. Reserve your spot today!