I Nstallation; General; Pre-Installation I Nspection - Mid-Continent Instruments 4300 Series Installation Manual And Operating Instructions

Section 2: I nstallation
2.1

General

This section contains mounting, electrical connections and other information required for
installation. After installation of cabling and before installation of the equipment, ensure that
power is applied only to the pins specified in the interconnection diagram.
CAUTI ON: GYROS ARE DELI CATE I NSTRUMENTS!
THE FOLLOWI NG PRECAUTI ONS MUST BE OBSERVED!!
A. A high gyroscope failure rate can be directly related to rough or improper handling.
Gyros are delicate and cannot withstand the shock of being dropped, jarred, or
struck by pieces of equipment. Do not place gyros on any hard surface. Pad with
generous foam. Handle like eggs!
B. To prevent damage to a gyro, the instrument should be transported to and from the
aircraft in it's original shipping container. I f this is impractical, the gyro should be
hand-carried carefully in an upright position.
C. A gyro should never be removed while it is spinning or running down. The instrument
normally operates at high RPM and may take 10 minutes or longer to run down. I f it
is removed while running and tilted more than 20 degrees, the gyro can develop a
gimbal lock. The gimbal will tumble and start to spin. I f gimbal lock occurs while the
rotor is turning, the gimbal may spin fast enough to damage the gimbal bearings,
requiring an overhaul.
D. A malfunctioning gyro should be handled with the same care given a new
instrument. Most malfunctioning instruments can be repaired and returned to
service. Using proper handling procedures during removal prevents additional
damage and helps ensure possible reuse.
2.2

Pre-installation I nspection

A. Unpacking: Carefully remove the attitude indicator from shipping container. The
shipping container and packing materials should be retained for use should the
attitude indicator require future shipment.
B. I nspect for Damage: I nspect the shipping container and indicator for any signs of
damage sustained in transit. I f necessary, return attitude indicator to the factory
using the original shipping container and packing materials. File any claim for
damages with the carrier.
C. CAUTI ON: The unit is shipped w ith the battery cable disconnected to
prevent inadvertent operation of the indicator during shipping.
was found connected when received, check the battery condition per section 2.6.3
and then reconnect the battery during instrument installation if it checks out ok.
Remaining discharged for extended periods may permanently damage the battery
pack.
Rev J, September 1, 2009
Mid-Continent I nstruments, Wichita, KS
Manual Number 9015762
I f the cable
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