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26 Cards in this Set
- Front
- Back
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Firefighting Ops Bulletin 5
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“Helicopters”
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After a helicopter crash there can be a variety of different flammable materials that could cause a fire or explosion. What are these materials?
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Gasoline or jet fuel, oxygen, oils, hydraulic fluid, and grease.
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All onlookers should be kept a minimum of how many feet away from the crash scene?
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1500 feet
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Most aircraft carry only enough fuel for their particular mission plus a slight reserve. Members should expect a potential of how much fuel on board the aircraft at any crash scene?
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100 gallons
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Where is the safest are of a helicopter crash?
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Inside the helicopter, flying debris from damaged rotors can cause serious injury and death.
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What is the most dangerous type of landing and takeoff?
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When the helicopter is hovering straight up and down.
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What is the safer method for a helicopter landing?
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It should land into the wind and approach the area at a slight angle to the ground as the aircraft reduces airspeed up to the area of touchdown.
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What information should be relayed to the pilot by the landing zone OIC in regards to landing?
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Suspended wires or other overhead obstructions.
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If the landing area will involve a street or thoroughfare it is important to stop all traffic in both directions _________ from the landing site.
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150 feet
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If the landing zone is in a field or park, stopping traffic at a minimum diameter of __________ is preferred.
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100 feet
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Remember when selecting a landing zone, the helicopter will generally try to land how?
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Descending in the direction of the wind or with the wind no more than 90 degrees off the nose of the aircraft.
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How should you approach a helicopter?
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Always approach a helicopter from the direction in which the pilot can see you. Do not approach until eye contact is made and the pilot gives you a signal to approach.
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Where should you never attempt to approach a helicopter?
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Never approach from the rear of the aircraft or cross under the tail rotor.
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While the aircraft is on the ground, post a guard at the _______ of the aircraft only during the time the helicopter is on the ground just outside the perimeter (100 ft.) to alert people of the tail rotor.
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Rear
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What three materials are most helicopters made up of?
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Magnesium, Titanium, and Aluminum.
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A lightweight, silvery metal that melts and ignites at approximately 1,200 degrees F. It will react violently with water and depending on the volume involved Class D (dry powder) extinguishers are required.
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Magnesium
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Silver-gray in color and is as strong as steel. Although lightweight, this material presents extreme extrication challenges.
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Titanium
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Lightweight and will loose structural support at the melting point of 700 – 800 degrees F.
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Aluminum
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Aviation fuel is what octane level and will be found in what type aircraft?
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100% octane or more; will be found in small personal planes, not helicopters.
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What kind of fuel is used in helicopter turbine engines?
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Jet Fuel A, which is a kerosene-type fuel.
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Characteristics:
Ignition Temp: 410 F Flashpoint: 100 F Vapor Density: 4.5 Flammable Range: 0.7 – 5% |
Jet A Fuel
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Characteristics:
Ignition Temp: 536 F Flashpoint: -45 F Vapor Density: 3 – 4 Flammable Range: 1.4 – 7.8% |
Gasoline
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Characteristics:
Ignition Temp: 494 F Flashpoint: 140 F Vapor Density: > 1 Flammable Range: 0.6 – 7.5 |
Diesel
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Where are the fuel cells located in helicopters?
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The fuel cells are usually located in the floor of the aircraft.
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What agencies own and operate helicopters within the Washington Metro Area?
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Oxygen, every precaution shall be taken to protect this tank from damage and if possible from heat or fire impingement.
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What is an added concern to F/F when dealing with medical transport helicopters?
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Oxygen, every precaution shall be taken to protect this tank from damage and if possible from heat or fire impingement.
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