Mid-Continent Instruments 4300 Series Manual

MANUAL NUMBER 9015834
REV. E May 17, 2007
PILOT’S GUIDE
for the
4300-XXX Series Electric Attitude Indicator
with Battery Backup
MID-CONTINENT INSTRUMENT CO., INC
9400 E. 34th Street N., Wichita, KS 67226 USA
Phone [phone] •Fax [phone]
[email protected]

Rev E May 17, 2007 Page 2 of 9 Manual # 9015834
Pilots Guide
Congratulations on selecting one of the most advanced new aviation products. The design
team at Mid-Continent has incorporated four decades of experience with aircraft
instrumentation to bring you the best possible reliability and value in aviation. We are
proud to offer the finest Attitude Indicator in its class. New technology allows our unit to run
twice as many hours as older designs. Our self-contained emergency power feature offers
pilots a level of safety never before available to fellow aviators. All this is backed by Mid-
Continent’s world class reputation for high quality and responsive service.”
J. Todd Winter
President
Forward
This manual provides operational instructions for use by persons who operate aircraft in
accordance with applicable Federal Aviation Regulations (Title 14 CFR).
We welcome your comments concerning this manual. Although every effort has been
made to keep this manual free of errors, some may occur. When reporting a specific
problem, please describe it briefly and include the manual part number, the
paragraph/figure/table number, and the page number. Please email or send your
comments to:
Mid-Continent Instruments
Attn: Technical Publications
9400 E. 34th ST North
Wichita, KS 67226 USA
Phone [phone] Fax [phone]
[email protected]

Operating Instructions
4300-xxx Series Electric Attitude Indicator
Rev E May 17, 2007 Page 3 of 9 Manual # 9015834
Pilots Guide
Table of Contents
Page
Section 1 General Description
1.1 Purpose 4
1.2 Functional Description 4
Section 2 Operation
2.1 General 5
2.2 Preflight Checks 5
2.3 Preflight Checklist, Normal Operation 5
2.4 Standby Operation, Emergency Mode 5
2.5 Standby Battery Check 7
2.6 Shutdown 7
Section 3 Equipment Limitations
3.1 Equipment Limitations 7
Section 4 EAI Function
Figure 1 8
Configuration Options 9

Operating Instructions
4300-xxx Series Electric Attitude Indicator
Rev E May 17, 2007 Page 4 of 9 Manual # 9015834
Pilots Guide
1 General Description
1.1 Purpose
The Model 4300-xxx Electric Attitude Indicator has two purposes:
1. To function as a primary and/or standby attitude indicator.
2. To continue to operate as a primary and/or standby attitude indicator in the event
that the aircraft main DC power source is interrupted or has failed in flight.
In the event that aircraft electrical power is lost, the indicator will switch to an internal
backup power source (rechargeable sealed lead acid battery) to permit continued
operation of the indicator.
1.2 Functional Description
The 4300-xxx Electric Attitude Indicator offers the unique feature of a self-contained
standby power source. Advances in the design of this gyro system allow it to operate for
approximately one hour after main input power is lost, depending on the battery condition
at the time of power failure.
The indicator requires 10 to 32 VDC input voltage. An integral dial lighting system features
a user replaceable light tray assembly. It operates from the aircraft lighting bus and is
available in 5V, 14V, or 28V versions. In standby power mode, low intensity LED powered
dial lighting is automatically turned on to provide nighttime visibility.
CAUTION:
A RED WARNING FLAG DROPS INTO VIEW TO INDICATE THAT THE
GYRO MOTOR IS NOT RECEIVING SUFFICIENT POWER TO OPERATE.
THIS WILL NORMALLY OCCUR ONLY IF THE UNIT IS TURNED OFF, OR
AFTER THE INTERNAL STANDBY BATTERY IS EXHAUSTED.
A FLASHING AMBER STATUS LIGHT AT THE BOTTOM LEFT OF THE
INDICATOR INDICATES THAT MAIN D.C. POWER IS INTERRUPTED OR
HAS FAILED AND THAT THE INDICATOR IS RUNNING ON ITS INTERNAL
BATTERY. THIS IS A TEMPORARY MODE LASTING APPROXIMATELY
ONE MINUTE. FURTHER ACTION IS REQUIRED TO SELECT CONTINUED
STANDBY BATTERY OPERATION (SEE SECTION 2.4).
The internal battery is designed for emergency use only. Storage at high ambient
temperatures, extended discharging, extended lack of charging, misuse and age will
require early battery replacement. Replacement can be done in the field with or without
removal of the attitude indicator. Do not operate this instrument without the specified
battery intact. Battery substitution, modification, misuse and lack of specified maintenance
will void all warranties and hold the manufacturer harmless from any and all claims or legal
actions.
Refer to an FAA authorized maintenance facility for testing and maintenance of this
instrument excluding battery or light tray replacement.

Operating Instructions
4300-xxx Series Electric Attitude Indicator
Rev E May 17, 2007 Page 5 of 9 Manual # 9015834
Pilots Guide
2 Operation
2.1. General
This section describes the Model 4300-xxx Electric Attitude Indicator operating
procedures. The indicator is required to be installed in an aircraft with the specified inputs
applied. Figure 1 provides an illustration of a typical Model 4300 display and a table
describing indicator functions.
2.2 Preflight checks
The following operational procedures are recommended when preparing the indicator for
use:
CAUTION:
THE INDICATOR MAY BE DAMAGED IF THE “PULL TO CAGE” KNOB
IS RELEASED WITH A “SNAP”. LOWER THE “PULL TO CAGE” KNOB
AVOIDING A “SNAP” RELEASE.
2.3 Preflight Checklist, Normal Operation
A. Master switch: On.
B. Gyro warning flag (red): Out of view.
C. Pull to cage knob: Extend fully and return.
D. Manually adjust pitch attitude presentation: As required.
NOTE:
Indicator may be momentarily caged (also known as ‘quick erect’) by pulling “PULL TO
CAGE” knob to the fully extended position, holding knob until the display stabilizes, and
then allowing the knob to return to the normal position.
2.4 Standby Operation, Emergency Mode
A. Amber Light Illuminated and Flashing
When the instrument switches to standby battery power, the amber STBY PWR
light on the lower left of the unit face flashes for approximately one minute. This is
intended to attract the pilot’s attention and allow confirmation that there has been a
loss of primary power to the 4300 Electric 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 approximately one (1) hour or until the battery is exhausted.
An independent standby dial lighting system also operates in this mode. The red
gyro warning flag remains out of view, which indicates the gyroscope is valid and
running on standby battery power.
Restoring aircraft power will clear any standby operation and resume automatic
battery charging.

Operating Instructions
4300-xxx Series Electric Attitude Indicator
Rev E May 17, 2007 Page 6 of 9 Manual # 9015834
Pilots Guide
B. In-Flight Emergency Procedure - Loss of Main DC Power
In the event of a loss or interruption of main power, the unit will immediately and
automatically switch to standby power. The amber standby power light will start
flashing and continue for approximately 1 minute, warning the pilot that the Electric
Attitude Indicator has lost its main DC power source. The following is a checklist to
activate the standby battery in the Electric Attitude Indicator.
1. Amber Light: Illuminated and flashing.
2. “STBY PWR” button: Press one time.
3. Attitude Indicator: Gyro warning flag out of view. If the red warning flag is
in view, the indicator is inoperative and must not be used.
4. Amber Light: Illumination will stop when STBY PWR button is pressed.
5. Indicator will run for approximately one hour if battery was fully charged.
If the “STBY PWR” is not pressed during the one-minute warning mode, the red
warning flag will appear in view; indicating unit is invalid and will shut down. If
operation is desired after the one-minute warning mode and shut down, simply
press the “STBY PWR” one time to activate the indicator on standby power.
C. Standby Operation Ground Check - Emergency Mode
1. Master switch: On – Unit running for 5 minutes minimum –
Red gyro warning flag out of view
2. Master switch: Off
3. Amber light: Illuminated and flashing.
4. Press “STBY PWR” button: Once
5. Amber light: Extinguished and not flashing.
6. Gyro warning flag: Not in view.
7. Press “STBY PWR” button: Once
8. Gyro warning flag: In view.
9. Master switch: On
10. Gyro warning flag: Not in view
11. Master switch: Off
12. Amber light: Illuminated and flashing for one minute then
extinguish

Operating Instructions
4300-xxx Series Electric Attitude Indicator
Rev E May 17, 2007 Page 7 of 9 Manual # 9015834
Pilots Guide
2.5 Standby Battery Check
Standby battery test is recommended only during routine ground or flight operations.
1. Master Switch: On – Unit running for 5 minutes minimum – Red gyro warning
flag out of view.
2. Press and hold “STBY PWR” button for approximately four seconds. Gyro is now in
a one-minute battery test mode. Amber LED will flash during this test sequence.
3. Green light illuminated during full test sequence: Standby battery is good.
4. Red light illuminated anytime during one-minute test sequence: Battery is not
charged and may require replacement. Refer to installation manual P/N 9015762
for instructions.
NOTE
Standby internal dial light automatically illuminates when Electric Attitude
Indicator is in the standby mode. This light has no dimming capabilities.
2.6 Shutdown
Upon shutdown of the aircraft the unit will annunciate a Power Loss Warning via a flashing
amber STBY PWR light. If not acknowledged, the gyro will automatically shut down after
approximately one minute. You may also shut down the gyro during this one minute period
by pressing the “STBY PWR” button twice. The red gyro warning flag will come into view. If
the indicator is allowed to operate in Emergency Power Mode long enough to
completely drain the battery, then battery service will be required before use in
Emergency Mode again.
3 Equipment Limitations
Actual operation time on the standby battery may vary considerably depending on
temperature, charge status, and battery condition. Low temperatures below 32°F will
temporarily degrade battery capacity. A poorly maintained battery will suffer accelerated
degradation. Extended storage in a discharged state, or over-charging will permanently
damage a battery. Complete charging is required to bring the battery up to full capacity if it
has been stored for more than four months or if it has been partially discharged.
Internal chemistry will slowly degrade battery capacity over several years of operation
even when correctly maintained. Recommended replacement interval for the standby
battery is 3 years due to naturally diminished capacity.
The 4300-xxx series Electric Attitude Indicator is not designed to be used as a reference
for frequent aerobatic flight. It is recommended to turn off the Electric Attitude Indicator
(red flag showing) at least five minutes before aerobatic maneuvers are initiated.

Operating Instructions
4300-xxx Series Electric Attitude Indicator
Rev E May 17, 2007 Page 8 of 9 Manual # 9015834
Pilots Guide
EAI Function
Figure 1
Roll Pointer: A) Fixed roll pointer: Indicates aircraft roll displacement relative to a
rotating roll dial.
B) Rotating roll pointer: Indicates aircraft roll displacement relative to a
fixed roll dial.
Gyro Warning Flag: If loss of operating voltage should occur, gyro warning flag will come
into view.
Display: Lower area of display, when referenced to the symbolic airplane,
indicates aircraft nose is below horizon or in a dive attitude. Upper area
of display indicates aircraft nose is above horizon or in a climb attitude.
Symbolic Airplane: Indicates roll and pitch attitude relative to the horizon. The symbolic
airplane can be moved (pitch only) using the symbolic airplane
adjustment knob.
Horizon Line: Indicates earth horizon relative to aircraft pitch and roll attitude.
Caging knob:
(Quick Erect) When pulled, manually erects the gyro vertical to the case orientation. Wings level to the horizon.
Symbolic Airplane
Adjustment Knob: Used to adjust the symbolic airplane.
Slip Indicator (option) Rolling ball indicates sideways slip or skid in a turn.

Operating Instructions
4300-xxx Series Electric Attitude Indicator
Rev E May 17, 2007 Page 9 of 9 Manual # 9015834
Pilots Guide
Model Number Input Voltage Roll Dial Horizon Dial Symbolic
Airplane
4300-411 10 to 32 VDC Rotating Standard Traditional
4300-412 10 to 32 VDC Fixed Standard Traditional
4300-413 10 to 32 VDC Rotating Standard Delta
4300-414 10 to 32 VDC Fixed Standard Delta
4300-431 10 to 32 VDC Rotating High Resolution Traditional
4300-432 10 to 32 VDC Fixed High Resolution Traditional
4300-433 10 to 32 VDC Rotating High Resolution Delta
4300-434 10 to 32 VDC Fixed High Resolution Delta
CONFIGURATION OPTIONS