Bank Indicator; Power Plant Instruments; Miscellaneous Instruments; Fuel Quantity Indicator - Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual

THRUSH AIRCRAFT, INC – MODEL S2RHG-T65 TURBO THRUSH
compensating magnets that are adjustable from the front of the case. Covers on the
face of the compass allow access to adjust the compensating magnets. The compass
should be swung and compensated at regular intervals and at any time equipment
installations are made that could cause compass deviation.
Locate the aircraft in area suitable for the method of magnetic compass compensation
to be used. Close doors and place flaps in a retracted position. Set the throttle at
cruise position with engine operating. Place all electrical switches, alternator, radio and
other equipment in a mode normally used in flight and proceed with the following:
M. Set adjustment screws of compensating magnets to zero. Zero position is when
the dot on the screw is lined up with the dot on the compass frame.
N. Position aircraft in a magnetically north direction. Adjust north-south adjustment
screw until compass reads exactly north.
O. Position aircraft in a magnetically east direction. Adjust east-west adjustment
screw until compass reads exactly east.
P. Position aircraft in a magnetically south direction. Notice the resulting south error.
Adjust north-south adjustment screw so that one-half of the error has been
removed.
Q. Position aircraft in a magnetically west direction. Notice the resulting west error.
Adjust east-west adjustment screw so that one-half of the error has been removed.
R. Position aircraft in successive magnetically 30-degree directions and record all
errors on the deviation card furnished with the compass.
The bank indicator, installed in the center of the upper instrument panels is a curved,
fluid-filled tube containing a ball. The gravitational and centrifugal forces position the
ball within the tube to indicate correct lateral altitude for the degree of banking.
This group consists of the oil temperature gauge, oil pressure and fuel pressure gauge,
ITT indicator, torque indicator, propeller RPM indicator, percent gas generator speed
indicator, and fuel quantity indicator. These instruments are operated by fluid pressure,
variation in electrical resistance created by a float operated transmitter, variations in
electrical resistance from a temperature probe, and by electrical variations from a tach-
generator. See Figure 8-1 for instrument markings.
A fuel quantity indicator registers the amount of fuel in the system up to a maximum of
164 U.S. gallons. Fuel from 165 to 230 U.S. gallons is un-gaugeable. The indicator is
basically a millivoltmeter that receives input signals from the fuel quantity transducers
(liquid level senders). The face of the fuel quantity indicator is marked in increments
from empty to full. The indicator is used in conjunction with two float-operated variable-
Effective: 9/16/05
AIRCRAFT MAINTENANCE MANUAL
MAGNETIC COMPASS COMPENSATION

BANK INDICATOR

POWER PLANT INSTRUMENTS

MISCELLANEOUS INSTRUMENTS

FUEL QUANTITY INDICATOR

8-5