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

Vor System

4 failure reports named the vor system in the last ten years, 15 since 2001, most often on the Boeing 737; the condition most often found was "failed".

Reports by year

012232001201012022
Reports by year, as a table
reports
20011
20023
20062
20071
20091
20101
20112
20172
20201
20221

Which system the reports file it under last ten years

Reports by system, as a table
reports
Instruments and avionics4

Models most often reporting it last ten years

Models most reported, as a table
reports
Boeing 7372
Boeing 7671
Sikorsky S-761

How it failed the condition found, last ten years

failed2malfunctioned1out of tolerance1
Conditions found, as a table
reports
failed2
malfunctioned1
out of tolerance1

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.