4.
Containment and security of unignited (or extinguished) fuel
5.
Rapid escape from the helideck area irrespective of location of the incident
6.
Ready availability and adequate protection of crash rescue and personnel protection equipment from weather and fire/crash effects.
Achievement of the above objectives should be the prime consideration when selecting equipment.
Proprietary equipment can, in most cases, meet objective 1 above, with either manual or remote operated equipment. This supposes that design, maintenance and operation are satisfactory.
Typical methods of meeting 1, 2 and 3 are through manual intervention using portable equipment (complementary media) or by foam / water hand lines fitted with an adjustable nozzle.
Technical advances and changes in international protocol are affecting the provision of complementary media and consideration should be given to proven alternates and replacements. All equipment should ideally have adequate capacity and discharge rates, whilst being flexible and easy to use and deployable for use inside the aircraft and in specialist areas such as engines.
Sound design and layout of the helideck and its associated facilities will achieve objectives 4, 5 and 6.
With particular reference to 5, failure to provide clear evacuation routes could result in trip hazards, or a compromise of escape arrangements.
Good maintenance of equipment, adequate operating procedures and personnel training are necessary for continued achievement of the objectives.
Helideck monitors may be positioned to allow them to cover adjacent areas of the installation, provided that this use does not inhibit their primary function of protecting the helideck.
11.5.4 Requirements of a Foam System
The need for a fixed firefighting system should be determined by assessing the risks to personnel, the practicalities of installing and operating the system, and the contribution the system makes to preserve life. The following factors should be considered:
.
The crewing of the installation and the practicalities of operating the system if it is normally unattended
.
The frequency of flights
.
The firefighting infrastructure on the installation (firepumps)
.
Legislation
.
Refuelling operations.
It is generally agreed that foam systems are currently the best method of achieving
rapid control of fires involving fuel spillage.
The effectiveness of a foam system depends on five criteria:
.
Speed of response
.
Reliability
.
Coverage
.
Quantity
.
Quality of the foam.
These requirements should be considered carefully when designing any system as well as during subsequent testing and maintenance. Weather conditions should also be taken into account.
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