TM 1-1520-240-MTF
4-3
A. AFCS BITE CHECKS.
Reference:
TM 55-1520-240-23
This test should only be performed to verify a sus-
pected AFCS discrepancy. The bite test is per-
formed by pressing the BITE switch on the AFCS
computer. The bite associated with system No. 1
tests system No. 1 only and system No. 2 test
system No. 2 only. The engine condition levers
provide a bite interlock which prevents inadvertent
bite operation during flight. The bite test can be
interrupted during operation by moving the engine
condition level out of the STOP position and back
again, or by switching the AFCS to OFF.
1-26.
1. Prior to activating the bite test, perform the
following:
a. Start apu and apply electrical and hydraulic
power.
b. Close all circuit breakers.
c. AFCS SYSTEM SEL — NO. 1 or NO. 2 (do
not select BOTH).
d. CYCLIC TRIM — AUTO.
e. Cyclic stick and directional pedals —
Center.
f. STEERING CONTROL panel — Knob
centered.
g. SWIVEL switch — LOCK.
h. Radar altimeter — Set LO knob to 100 feet.
i. Heading bug to heading of helicopter, then
30_ clockwise.
j. ENG CONDITION levers — STOP.
k. Ensure left and right aft landing gear is in
ground contact. (Not on jacks.)
