This standard specifies the minimum performance requirements that fuel and oil gauges used on civil aircraft (hereinafter referred to as aircraft) must meet. This standard applies to the following two basic types of fuel gauges: a. Float-type fuel gauge; b. Capacitive fuel gauge.
HB 6553-1991 history
1992HB 6553-1991 Minimum Performance Requirements for Civil Aircraft Fuel and Lubricating Oil Quantity Gauge