ED Decision 2005/006/R
For each APU instrument either a placard or colour markings or an
acceptable combination must be provided to convey information on the maximum
and (where applicable) minimum operating limits. Colour coding must comply
with the following:
(a) Each
maximum and, if applicable, minimum safe operating limit must be marked with a
red radial or a red line;
(b) Each
normal operating range must be marked with a green arc or green line, not
extending beyond the maximum and minimum safe limits;
(c) Each
precautionary operating range must be marked with a yellow arc or a yellow
line; and
(d) Each
APU speed range that is restricted because of excessive vibration stresses
must be marked with red arcs or red lines.
[Amdt 25/1]
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