Maintenance Precautions; Sub-Systems And Components; Fuel Quantity Indicating System; Fuel Quantity Indicator - Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual

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THRUSH AIRCRAFT, INC – MODEL S2RHG-T65 TURBO THRUSH

fuel should be drained from each wing tank drain, the header tank drain, and the firewall

fuel filter until all signs of water are gone.

The establishment of safe maintenance procedures is necessary to ensure safety of

personnel and prevent damage to the aircraft when performing fuel system maintenance.

The principle precautions that should be enforced are enumerated as follows:

Perform fuel system maintenance in an approved work area.

Ground aircraft and maintenance stands to a common ground; ground- attaching

surfaces must not be painted.

Remove external power sources and disconnect batteries.

Suspend all maintenance except fuel system maintenance, unless area is declared

safe from explosive vapors.

Assure that fire-extinguishing equipment is readily available.

Use air-driven power tools only.

Use explosive-proof electric lights or flashlights.

Wear cotton clothing to avoid possible static electricity discharge.

Service, defuel, and refuel aircraft as outlined in Section II.

Do not remove components from the fuel system until replacement components or

covers are available for exposed openings.

Always replace O-rings, seals, etc. when re-installing fuel system components.

The fuel quantity indicating system consists of a fuel quantity indicator, located in the left

instrument panel and electrically connected to a fuel quantity transmitter installed in each

fuel tank. The fuel quantity indicating circuit is provided with variable resistors within the

transmitters. These resistors vary the current flow through the indicating circuit. As the

current flow varies, the needle on the fuel quantity indicator will indicate the level of fuel

sensed by the fuel quantity transmitter.

One fuel quantity indicator is installed in front of the pilot in the left instrument panel. This

instrument is a single reading indicator that serves either the left of right fuel tank by

operation of an electric fuel tank-selector switch on the left instrument panel. A

transmitter installed in each fuel tank sends input signals to the indicator that gives the

proper level of fuel in each tank. The instrument face is marked in increments from empty

to full. Refer to Section 8 for additional information.

Effective: 9/16/05

AIRCRAFT MAINTENANCE MANUAL