The operational objective of the arff would be to

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The operational objective of the ARFF would be to achieve response time not exceeding three minutes to the end of each runway in conditions of visibility 2500 m or better and dry, paved surface conditions. Any other vehicles required to deliver the amounts of extinguishing agents specified in Table 7.4 would arrive no more than one minute after the first responding vehicle(s) so as to provide continuous agent application. Access routes to the response area are required to be designated and made suitable for use by RFF vehicles. Routes are to be maintained in a condition that facilitates use. Procedures would be developed to place the RFF personnel on stand by alert when the aerodrome visibility has deteriorated below a predetermined level. Table 7.4: Minimum Usable Amounts of Extinguishing Agents Supplementary water supplies, for the expeditious replenishment of rescue and fire fighting vehicles at the scene of an aircraft accident would be provided. Fire Extinguishing Agent Performance Criteria The primary attack agent for ARFF vehicles would be Aqueous Film Forming Foam (AFFF), performance conforming to level B, as given in Table 7.5. Requisite quantities of foam compound would (c) UPES, Not for Reproduction/ Sale
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UNIT 7: Aircraft Rescue and Fire Fighting Services Notes ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ be maintained at each station in conformation with ICAO guidelines. Table 7.5: Fire Tests and the Performance Conforming to Level B Fire Tests Performance Level B 1. Nozzle (air aspirated). Branch pipe. Nozzle pressure. Application rate. Discharge rate “UNI 86” foam nozzle. 700 kPa. 2.5 litre per minute per square meter. 11.4 litre per minute 2. Fire size 4.5 square meter approx. (circular) 3. Fuel (on water substrate) Kerosene 4. Preburn time 60 seconds 5. Fire performance. Extinguishing time. Total application time. 25% reignition time. Equal to or less than 60 seconds. 120 seconds. Equal to or more than 5 minutes. In addition to primary agent, necessary amount of complementary agent would also be carried in ARFF vehicles. A minimum of 200 % of foam concentrate and complementary agent would be held in reserve and would be available at all times on the aerodrome. Additional stocks of extinguishing agents required for training would be also provided. The complementary agents would comply with the appropriate specifications of the Bureau of Indian Standards/ISO or equivalent. The discharge rate of the foam solution would not be less than the rates shown in Table 7.4. The discharge rate of complementary agents would be selected for optimum effectiveness of the agent. Ancillary Equipment and Performance Criteria ARFF vehicles carry a wide range of rescue, fire fighting and salvage equipment as complements for providing rescue and fire fighting function. The list of such ancillary equipment is maintained at each ARFF vehicle and station.
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  • Fall '19
  • Instrument approach, Runway, Rajiv, Aviation Safety & Security Management

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