M25.2 Showing compliance

(a)The applicant must provide data from analysis, ground testing, and flight testing, or any combination of these, that:

(1)validate the parameters used in the analysis required by paragraph M25.1;

(2)substantiate that the FRM is effective at limiting flammability exposure in all compartments of each tank for which the FRM is used to show compliance with paragraph M25.1; and

(3)describe the circumstances under which the FRM would not be operated during each phase of flight.

(4)identify critical features of the fuel tank system to prevent an auxiliary fuel tank installation from increasing the flammability exposure of main tanks above that permitted under paragraphs M25.1(a) and (b) of this appendix and to prevent degradation of the performance and reliability of the FRM.

(b)The applicant must validate that the FRM meets the requirements of paragraph M25.1 of this appendix with any aeroplane or engine configuration affecting the performance of the FRM for which approval is sought.

(c)Any FRM failures or failures that could affect the FRM, with potential catastrophic consequences shall not result from a single failure or a combination of failures not shown to be extremely improbable.

(d)It must be shown that the fuel tank pressures will remain within limits during normal operating conditions and failure conditions.

(e)Oxygen-enriched air produced by the FRM must not create a hazard during normal operating conditions.

[Amdt 25/6]