ED Decision 2005/006/R
(a) General.
Compliance with CS 25J1041 must be
shown by tests, under critical conditions. For these tests, the following
apply:
(1) If the tests are conducted under
conditions deviating from the maximum ambient atmospheric temperature, the
recorded APU temperatures must be corrected under sub-paragraph (c) of this
paragraph.
(2) No corrected temperatures determined under
sub-paragraph (a)(1) of this paragraph may exceed established limits.
(b) Maximum
ambient atmospheric temperature. A maximum ambient atmospheric temperature
corresponding to sea level conditions must be established. The temperature
lapse rate is 2.0°C per 300 metres of altitude above sea level until a
temperature of -56.5°C is reached, above which altitude, the temperature is
considered constant at -56.5°C.
(c) Correction
factor. Unless a more rational correction applies, temperatures of APU fluids
and components for which temperature limits are established, must be corrected
by adding to them the difference between the maximum ambient atmospheric
temperature and the temperature of the ambient air at the time of the first
occurrence of the maximum component or fluid temperature recorded during the
cooling test.
[Amdt 25/1]
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