The U.S. aircraft register, updated daily
Parts · Instruments and avionics

Efi

1 failure reports named the efi in the last ten years, 2 since 2010; the condition most often found was "failed".

Reports by year

000111201012017
Reports by year, as a table
reports
20101
20171

Which system the reports file it under last ten years

Reports by system, as a table
reports
Instruments and avionics1

How it failed the condition found, last ten years

failed1
Conditions found, as a table
reports
failed1

Engines most often reporting it

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.