TM 55-1510-219-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
F. AVIONICS FLIGHT CHECKS (CONT)
flown at the time IAS hold switch
was pressed.
i.
Check
roll
command
function
of
autopilot as follows:
(1)
Turn control knob (autopilot
pitch-turn control panel) Turn to
L and R and verify that autopilot
turns
aircraft
left
or
right
respectively.
*2. Slaved
compass
systems
Check
that
systems
agree
with
known
magnetic
headings within +2° and within 3° of each
other.
*3. Inertial navigation system flight test -
Perform as follows:
Satisfactory performance shall be demonstrated by
flying over three checkpoints whose latitude and
longitude are known, and comparing them with the
inertial present position readouts. The aircraft shall
establish a low altitude, compatible with aircraft
safety and applicable laws and codes of flight, which
will allow accurate sighting of ground landmarks. An
altitude of 1000 feet over waypoints and 10,000 feet
or more when between waypoints is recommended
whenever possible.
a.
Inertial navigation system - Set up,
align, and operate in accordance with
TM 55-1510-219-10.
b.
TACAN update - Check as follows:
(1)
Key 4 - Depress.
4-10
