ED Decision 2022/021/R
COLLECTION, INVESTIGATION, AND ANALYSIS OF DATA RELATED TO FLAMMABILITY REDUCTION MEANS (FRM) RELIABILITY
Holders of a TC, an RTC, an STC, or any other relevant approval that is deemed to have been issued under Part 21, which have included an FRM in their design, should continuously assess the effects of aeroplane component failures on FRM reliability. This should be part of the system for the collection, investigation, and analysis of data, which is required by point 21.A.3A(a). The applicant/holder should therefore:
(a) demonstrate effective means to collect FRM reliability data; those means should provide data that affect FRM reliability, such as component failures;
(b) unless alternative reporting procedures are approved by EASA, submit a report to EASA every 6Â months for the first 5Â years after service introduction; after that period, continued reporting every 6Â months may be:
— replaced with other FRM reliability tracking methods that are deemed acceptable by EASA; or
— eliminated if it is established that the FRM reliability meets, and will continue to meet, the exposure specifications in paragraph M25.1 of Appendix M to the Certification Specifications for Large Aeroplanes (CS-25); and
(c) develop service instructions or revise the applicable aeroplane manual, according to a schedule that is approved by EASA, to correct any failures of the FRM that occur in service, which could increase any fuel tank’s fleet average flammability exposure to more than what is specified in paragraph M25.1 of Appendix M to CS-25.
AMC2 21.A.3A(a) requires TC/STC holders to collect and analyze FRM reliability data, report to EASA every 6 months for 5 years, and correct failures per approved schedules.
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