TB 43-0123
CN-811( )/ASN
EIC: NIA
1. Brief Description: The CN-811 ( )/ASN is a roll
2. Applicable Tools and Test Equipment:
and pitch displacement gyro used in aircraft attitude
Not Applicable.
indicating systems. There are various models of CN-
811( )/ASN (Plain, A, B, & C) as well as other part
3. Applicable Publications:
numbered gyros (9000F and SBU-6) that are used
Not Applicable.
on the CH47( ) aircraft. The main differences
between the various models of the gyros is in the
input power requirement of the gyro and also the
model of aircraft capable of accepting it. The
following matrix depicts the power requirement of the
gyro and also the model of aircraft capable of
accepting it.
Item
Power Rqmt
Aircraft Type
CN-811B/C/ASN Single Phase
CH47D
9000F
Single Phase
CH47D
II-D-3
