The U.S. aircraft register, updated daily
Parts

Rfu

0 failure reports named the rfu in the last ten years, 9 since 2010.

Reports by year

01234120102422013
Reports by year, as a table
reports
20101
20112
20124
20132

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.