Servicing Battery Installed In Aircraft; Generator System - Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual

THRUSH AIRCRAFT, INC – MODEL S2RHG-T65 TURBO THRUSH
E. Check and re-adjust electrolyte level as necessary by adding more electrolytes to
obtain proper level as stated in procedure B.
F. Install vent plugs tightly into each cell.
G. Clean and neutralize any spilled electrolyte on battery.
H. Charge battery until all cells are gassing freely and the charge voltage and specific
gravity of electrolyte are constant over three successive readings taken at one-
hour intervals. (This procedure may take 18 - 24 hours with a constant current
charger.) During the period of charging, the electrolyte temperatures shall be
maintained between 60°F and 110°F (15.6°C and 43.3°C). Charge rate is 3 amps.
Reduce rate by 1/2 when cells start gassing.
I. When the battery is completely charged, the specific gravity should read between
1.285 and 1.295. At this point, if electrolyte level needs to be adjusted, remove or
add electrolyte to proper level and recharge for one hour.
Gasses given off by a battery under charging conditions are
flammable.
For more detailed instructions, see Gill Service Manual.

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.
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.
10 - 4
AIRCRAFT MAINTENANCE MANUAL
1.285 - 1.295
1.275 or Less
** CAUTION **
* NOTE *

GENERATOR SYSTEM

CHARGED
RECHARGE
(See battery-servicing
Effective: 05/05/04