ED Decision 2010/005/R
(a) Each
fuel system must be constructed and arranged to ensure a flow of fuel at a
rate and pressure established for proper APU functioning under each likely
operating condition, including any manoeuvre for which certification is
requested and during which the APU is permitted to be in operation.
(b) For
essential APUs:
Each fuel system must be arranged so that any air which is introduced
into the system will not result in flameout.
(c) For
essential APUs:
Each fuel system for an essential APU must be capable of sustained
operation throughout its flow and pressure range with fuel initially saturated
with water at 26.7 °C and having 0.20 cm3 of free water per liter
added and cooled to the most critical condition for icing likely to be
encountered in operation.
[Amdt 25/1]
[Amdt 25/9]
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