Servicing Battery Installed In Aircraft; Generator System; Diagrams; Battery Operation - Thrush Aircraft S2R–T660 Maintenance Manual

THRUSH AIRCRAFT INC - T660 TURBO THRUSH

SERVICING BATTERY INSTALLED IN AIRCRAFT

The 24-volt battery is installed aft of the engine on the engine mount lower longerons and is
accessible through the removable cowling skins. Check the battery electrolyte level frequently,
especially during hot weather. If a visual check shows low cell level, add distilled water to bring the
cell(s) up to the proper lever. (See battery-servicing instructions)
The generator system consists of a generator, voltage regulator, reverse current relay and circuit
breaker (See electrical diagrams). The generator is connected to the circuit breaker bus and will
supply the current demands when output voltage exceeds battery voltage.

DIAGRAMS

The Electrical Diagrams of the Model S2R-T660 aircraft is at the end of this section.

BATTERY OPERATION

Battery operation is controlled by a battery switch, placarded BATT-ON-OFF, located on the switch
panel in the cockpit. The battery is capable of assuming the complete electrical load for a limited
time at 70 amps max.
The batteries are located on the battery plate assembly on the engine mount aft of the engine. They
are installed with two-battery hold down rods through the battery cover. The battery case is vented
overboard to dispose of any electrolyte or hydrogen gas fumes discharged during normal charging
operation. Air enters the battery compartment from an air scoop located in the left cowl shin skin,
circulates throughout the battery compartment, and exist through a vent in the battery and drains
overboard through a vent located on the belly skins.

BATTERY REMOVAL

A. Verify that the BATT-ON-OFF switch is off. Disconnect external power.
Effective: 12/17/03
AIRCRAFT MAINTENANCE MANUAL
1.285 - 1.295
1.275 - Less

GENERATOR SYSTEM

CHARGED
RECHARGE
10 - 4