Table 7-16. Malfunction Details - continued
Indications presented
Corrective
to Instructor/operator
Aircraft indications
Required
Ref
act ion
and trainee
and related effects
malfunction
number
Noncorrectable;
Instructor: DOPPLER SDC PWR
23143
T h e power supply in the
t u r n DNS off.
appears on CRT.
signal data converter
SDC PWR
f a i l s . All signals routed
T r a i n e e : HSI range and NAV
to DNS through the SDC
flags drop into view. Bear-
are lost.
i n g p o i n t e r 1 p a r k s a t 9 0O
a n d HSI course deviation bar
centers. CDU MEM and MAL
lights illuminate. DNS
outputs and displays are
erroneous. 1553 bus outputs
are in error. After running
system test:
The display reads:
000 000 000 000
then display reads:
NG S890000
Instructor: HARS HEADING
Valid HARS heading data
Noncorrectable
23144
HARS
appears on CRT.
is lost.
HEADING
Trainee: Compass rings on
H S I and RMI freeze at their
current indications, compass
ring flags In view.
