Parts · Fuel system

Sem Unit

3 failure reports named the sem unit in the last ten years, 3 since 2019, most often on the Mcdonnell Douglas MD-11; the condition most often found was "contaminated".

Reports by year

Reports by year, as a table

	reports
2019	1
2020	1
2025	1

Which system the reports file it under last ten years

Fuel system2Instruments and avionics1

Reports by system, as a table

	reports
Fuel system	2
Instruments and avionics	1

Models most often reporting it last ten years

Mcdonnell Douglas MD-112Boeing 7571

Models most reported, as a table

	reports
Mcdonnell Douglas MD-11	2
Boeing 757	1

How it failed the condition found, last ten years

contaminated1failed1malfunctioned1

Conditions found, as a table

	reports
contaminated	1
failed	1
malfunctioned	1

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.