Text in force at CS25-28: from CS25-0, effective 17 Oct 2003.
Unless otherwise specified, compliance with the requirements of CS 25.1181 to 25.1203 must be shown by a full scale fire test or by one or more of the following methods:
(a) Tests of similar powerplant configurations;
(b) Tests of components;
(c) Service experience of aeroplanes with similar powerplant configurations;
(d) Analysis.
ED Decision 2003/002/RM · Source