Hopper Quantity System - Thrush Aircraft S2R–T660 Maintenance Manual

TROUBLE
No indication on indicator
No indication and resistance
checked good
No indication and resistance
checked good
Effective: 12/17/03
THRUSH AIRCRAFT INC - T660 TURBO THRUSH
AIRCRAFT MAINTENANCE MANUAL

HOPPER QUANTITY SYSTEM

PROBABLE CAUSE
Bad sensing element
Bad indicator
Bad FA-A control
REMEDY
Disconnect wires and check
resistance. Refer to Fig. 8-
2.
Resistance check bad.
Replace element (non-
repairable).
Check power and ground
connections. Observe
meter on FA-A control unit.
If meter works with
movement of ball, indicator
or wires to indicator are bad.
Check wiring. Wiring OK,
replace FA-A control. Pins
5, 8, 11 and 15 are power
pins on FA-A unit. Pin 15 is
attached to 1A C/B. Pins 8
and 11 are jumped to pin
15. Pin 5 goes to + on rear
of tank quantity gauge.
Grounds are located on pins
4 and 16. Pin 4 is
connected to ground on rear
of tank quantity gauge. Pin
16 is chassis ground.
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