Jacking; Leveling; Cold Weather Operation; Cold Weather Maintenance Hints - Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual

THRUSH AIRCRAFT, INC – MODEL S2RHG-T65 TURBO THRUSH
AIRCRAFT MAINTENANCE MANUAL

JACKING

Jack points are provided on each main spar and located at wing stations 120 & 193.38.
When using the jack points to lift the aircraft, all hopper loads should be removed. (Fig. 2-
1) A jack point is also provided on the tail wheel trunnion attach fitting on the lower left
longeron.

LEVELING

The aircraft may be leveled by raising the tail to an approximate level flight position and
by supporting the tail on a stable jack or platform. Adjust the height of the tail wheel until
the left-hand lower longeron located under the cockpit is level.

COLD WEATHER OPERATION

Aircraft operation in cold weather creates a need for additional maintenance practices and
operating procedures that are not required in moderate temperatures. Whenever
possible, shelter the aircraft in a heated hangar to prevent frost, ice, or snow
accumulation that requires added maintenance time to remove. These weather
elements, if allowed to accumulate only a fraction of an inch in thickness on the critical
airfoils and control surfaces, seriously degrade aircraft lift and flight control effectiveness.
The possibility of aircraft system failures is increased when the aircraft is parked where
wind driven snow or freezing rain can be forced into various openings of the aircraft. If
the aircraft is to be moored outside in extreme cold, the battery should be kept fully
charged to prevent freezing. Make certain that all vents, air inlets, and so forth are
covered.
Locating the aircraft inside a heated hanger is the most effective method of preheating the
aircraft. The use of an external power unit is recommended to conserve the battery.

COLD WEATHER MAINTENANCE HINTS

The information that follows is intended only for the purpose of supplementing the existing
information in this manual when operating the aircraft in cold weather. Keeping the
aircraft in top maintenance condition during cold weather cannot be over stressed.
The battery should be maintained at full charge during cold weather to prevent freezing.
After adding water to the battery in freezing temperatures, charge the battery to mix the
water and electrolyte. A frozen battery may explode when subjected to a high charge
rate. Corrosive damage to the area adjacent to an exploded battery will result if the
electrolyte solution is not removed immediately. Instructions for removing spilled
electrolyte are provided in this Section. The battery should be removed and stored in a
warm place if the aircraft is to remain idle for an extended period of time.
In the fuel system, condensation is more likely to occur in cold weather due to a more
rapid and positive division of moisture content from other fuel properties. If at all possible,
use fueling facilities that filter moisture from the fuel. If fueling facilities with filters are not
available, filter the fuel through a good quality chamois. Fill the tanks with correct grade
of fuel as soon as possible after landing to reduce the possibility of condensation and ice
formation in the tanks. Fuel extracted from fuel header tank drain before starting
deserves a closer examination when the aircraft is being operated in cold weather.
Cold weather operation demands procedures that are in addition to normal Post Flight
2-4
Effective 05/05/04