TM 1-1520-240-10
9-1-29/(9-1-30 blank)
9-1-76. Dual AFCS Failure.
AFCS SYSTEM SEL switch — OFF.
If IMC;
Land as soon as practicable.
9-1-77. Vertical Gyro (VGI) Malfunction.
A vertical gyro malfunction will be indicated by an attitude
indicator failure, an AFCS OFF caution, and attitude
transients. If a vertical gyro failure occurs, proceed as
follows:
CAUTION
Failure of the No. 1 vertical gyro with altitude
hold engaged may result in an altitude
runaway. If this occurs, disengage ALT
HOLD.
NOTE
Failure of a vertical gyro results in loss of its
associated AFCS and should be treated as a
single AFCS failure.
1. Airspeed — 100 KIAS or Vne , whichever
is slower.
2. Affected VGI switch — EMER.
3. AFCS — Select remaining system.
9-1-78. Differential Airspeed Hold Failure (DASH).
Differential airspeed hold failure will be recognized by
pitch attitude deviations. If DASH failure occurs, avoid
nose high attitudes.
9-1-79. Cockpit-Control Driver Actuator (CCDA)
Failure.
1. THRUST CONT lever — Slip as required.
2. RADALT/BARO
ALT
switch—DISEN-
GAGED.
