Hopper Quantity; Calibration Of Remote Gauge - Thrush Aircraft S2R–T660 Maintenance Manual

charge side unless there is an aircraft generator malfunction, or if the electrical load demand exceeds the
aircraft generator output, the ammeter will indicate the discharge side. Continuous operation on the discharge
side will be detrimental to battery life and may cause loss of electrical power.

HOPPER QUANTITY

The hopper quantity consists of three parts -- the level sensing element in hopper, FA-A control box normally
located on left side of cockpit, and quantity gauge located in instrument panel. The gauge is adjustable
between 0 gallons to 360 gallons and incorporates two lights, one amber light for low quantity, and one red
right for hopper empty. The system can be calibrated as per the following instructions.

CALIBRATION OF REMOTE GAUGE

A. The remote hopper level gauge markings are an indication of hopper load in level flight.
B. A screw type adjuster located on the face of the gauge at the six o'clock position adjusts the remote
gauge 0 mark. Adjustment of the screw CW or CCW will move pointer left or right.
C. With floating ball against lower stop collar, adjust screw adjuster until pointer is aligned with 0 mark
on gauge.
Effective: 12/17/03
THRUSH AIRCRAFT INC - T660 TURBO THRUSH
AIRCRAFT MAINTENANCE MANUAL
A scale is provided to show the relationship of the remote
gauge, % scale on analog control unit type FA-A, and
number of inches the bottom of the floating ball is away
from the top of the lower stop collar. The column labeled
ground shows how many gallons are in the hopper with the
aircraft in the ground attitude in relationship to the remote
gauge reading.
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