TM 55-6930-212-10
Table 7-2. Simulated Malfunction Details - Continued
Method of
Indications and effects on
Effects sensed by trainee
introduction
related systems as presented
if corrective action is
Malfunction
by instructor
to the instructor and trainee
not taken
ILS receiver
319
If tuned to a valid ILS:
ILS navigational system
1.
LOC flag appears in ID-2103.
inoperative.
2.
Glideslope (G/S) flag appears
in ID-2103.
3.
Horizontal and vertical
needles in ID-2103 center.
4.
Station ident is disabled.
CRS/LOC needle
320
If a valid course (CRS) or LOC is
Vertical needle in ID-2103
oversensitive
tuned.
vertical needle in ID-2103
becomes twice as sensi-
becomes twice as sensitive (i.e
tive.
one dot true equals two dots
indicated).
CRS/LOC needle
321
Vertical needle in ID-2103
All other CRS/LOC indica-
inoperative
centers.
tors are not affected.
Glideslope needle
322
Horizontal needle in ID-2103
No valid glideslope
inoperative
centers.
indication.
PLT HSI No. 1
323
PLT HSI pointer No. 1 oscillates
Invalid Doppler station
Doppler pointer
±20°from station bearing.
bearing.
oscillates
PLT HSI No. 2
324
PLT HSI pointer No. 2 oscillates
Invalid VOR/ADF station
VOR/ADF pointer
±20° from station.
bearing.
oscillates
PLT HSI card
325
PLT HSI compass card precesses
PLT HSI compass card pre-
excitation loss
at a rate of 150 per hour.
cesses.
PLT HSI card
326
PLT HSI compass card oscillates
PLT HSI compass card
erratic
±5° from magnetic heading.
erratic.
7-8
