Fuel Quantity Indicating System (FQIS)
Fuel Quantity Indicating System (FQIS)
Definition
An acronym for "Fuel Quantity Indicating System" which, on modern multi-engined aircraft, is likely to include several independent measurement and indication components such as fuel tank and engine feed tank contents and low level alerting
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SKYbrary Aviation Safety. (June 24, 2022). Fuel Quantity Indicating System (FQIS).
Retrieved February 3, 2026
from https://skybrary.aero/articles/fuel-quantity-indicating-system-fqis
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