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with foam, care must be exercised to ensure compatibility.
Note 2.- Alternate complementary agents having
equivalent fire fighting capability may be utilized. Additional
information on extinguishing agents is given in the Airport
Services Manual, Part I.
9.2.1 1 The amounts of water for foam production and the
complementary agents to be provided on the rescue and fire
fighting vehicles shall be in accordance with the aerodrome
category determined under 9.2.3, 9.2.4, 9.2.5, 9.2.6 and
Table 9-2, except that these amounts may be modified as
follows:
a) for aerodrome categories 1 and 2 up to 100 per cent of
the water may be replaced by complementary agent; or
b) for aerodrome categories 3 to 10 when a foam meeting
performance level A is used, up to 30 per cent of the
water may be replaced by complementary agent.
For the purpose of agent substitution, the following
equivalents shall be used:
1 kg = 1.0 L water for production of a foam
complementary agent meeting performance level A
1 kg = 0.66 L water for production of a
complementary agent foam meeting performance level B
Note I.- The amounts of water specified for foam
production are predicated on an application rate of
8.2 L/min/m2 for a foam meeting peflormance level A, and
5.5 ~ / m i n / mfor~ a foam meeting peflormance level B.
Note 2.- When any other complementary agent is used, the
substitution ratios need to be checked.
9.2.12 The quantity of foam concentrates separately
provided on vehicles for foam production shall be in
proportion to the quantity of water provided and the foam
concentrate selected.
9.2.13 Recommendation.- The amount of foam
concentrate provided on a vehicle should be sufticient to
produce at least two loads of foam solution.
9.2.14 Recommendation.- Supplementary water supplies,
for the expeditious replenishment of rescue and fire
fighting vehicles at the scene of an aimraft accident, should be
provided.
9.2.15 Recommendation.- When both a foam meeting
pe$ormance level A and a foam meeting peflormance level B
Annex 14 -Aerodromes Volume I
Table 9- 1. Aerodrome category for rescue
and fire fighting
Maximum
Aerodrome fuselage
category Aeroplane overall length width
(1) (2) (3)
1 0 m up to but not including 9 m
2 9 m up to but not including 12 m
3 12 m up to but not including 18 m
4 18 m up to but not including 24 m
5 24 m up to but not including 28 m
6 28 m up to but not including 39 m
7 39 m up to but not including 49 m
8 49 m up to but not including 61 m
9 61 m up to but not including 76 m
10 76 m up to but not including 90 m
Table 9-2. Minimum usable amounts of extinguishing agents
Foam meeting performance level A Foam meeting performance level B Complementary agents
Discharge rate Discharge rate m2
Aerodrome water' foam solution/ minute water1 foam solution/ minute chemical powders
category (L) (L) (L) (L) (kg)
(1) (2) (3) (4) ( 5 ) (6)
Note 1.- The quantilies ofwater shown in columns 2 and 4 are based on the average overall length of aeroplanes in a given category. Where
operations of an aeroplane larger than the average size are expected, the quantities of water would need to be recalculated. See the Airport
Services Manual, Part 1 for additional guidance.
Note 2.- Any other complementary agent having equivalent fire fighting capability may be used.
Chapter 9 Anna I4 -Aerodromes
are to be used, the total amount of water to be provided for
foam production should first be based on the quantity which
would be required if only a foam meeting per$ormance level A
were used, and then reduced by 3 L for each 2 L of water
provided for the foam meeting per$ormance level B.
9.2.16 The discharge rate of the foam solution shall not
be less than the rates shown in Table 9-2.
9.2.17 Recommendation.- The complementary agents
should comply with the appropriate specifications of the
International Organization for Standardization (ISO). *
9.2.1 8 Recommendation.- The discharge rate of complementary
agents should be selected for optimum effectiveness
of the agent.
9.2.19 Recommendation.- A reserve supply of foam
concentrate and complementary agent, equivalent to 200 per
cent of the quantities of these agents to be provided in the
rescue and fire fighting vehicles, should be maintained on the
aerodrome for vehicle replenishment purposes. Where a major
delay in the replenishment of this supply is anticipated, the
amount of reserve supply should be increased.
Rescue equipment
9.2.20 Recommendation.- Rescue equipment commensurate
with the level of aircraft operations should be provided
　
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