Mid-Continent Instruments, Wichita, KS
Rev B May 25, 2004 Manual Number 9015762 Page 19 of 21
B. Acceleration & Deceleration Errors
Pitch/roll indicating errors may occur due to accelerations experienced during takeoff,
climb-out, descent, and landing. Errors that develop will be self-corrected by the
internal erection system or manually corrected (in straight and level flight) by the
actuation of the caging system.
C. Taxiing Errors
A pitch and roll indicator display error of approximately 1
°
will occur during a sudden
90
°
ground turn. A pitch indicator display error of approximately 2
°
will occur during
a sudden 180
°
ground turn. Errors that develop will be self corrected by the internal
erection system or manually corrected by the actuation of the caging system.
3.5
Standby Battery Operation
Supply aircraft power to the instrument. The internal standby battery charges automatically
while the gyro is running. Lighting is on a separate circuit connected to the aircraft lighting bus.
A. Normal Flight
At loss of external power, an amber LED will flash indicating a Power Loss Warning.
With no further action from the pilot, the unit will turn off automatically (gyro flag in
view) after approximately one minute. This is to prevent battery discharge at the
end of a flight when the master power switch is placed in the off position.
B. Loss of Aircraft Power
When the instrument switches to Power Loss Warning, the amber LED flashes for
approximately one minute. This is intended to attract the pilot’s attention and
indicate that there has been a loss of primary power to the 4300 Attitude Indicator.
Pushing the STBY PWR button on the face of the instrument will allow the unit to
continue operating on the standby battery for nominally one (1) hour or until the
battery is exhausted. See Fig 2.5 for more information on battery discharge rate.
An independent standby dial lighting system also operates in this mode. The gyro
warning flag remains out of view, which indicates the gyroscope is valid and running
on standby battery power.
Any time aircraft power is absent, with the unit in either Power Loss Warning or shut
off, pushing the STBY PWR button will put the unit in the standby power mode. The
instrument will run from standby power until the standby battery is exhausted. If
the unit is running on the standby battery, pushing the STBY PWR button will turn
the unit off. Pushing the STBY PWR button again will restore standby power and
lighting.
Restoring aircraft power will clear any standby operation and resume automatic
battery charging.
