BENDIX/KING
KAP 140
Page 4--2
Revision 2, Dec/2002
CS:15574F02.IDU
Checks to Perform
Possible Cause(s)
Symptom
Pitch servo slip clutch set be-
low minimum torque.
Check and adjust slip clutch torque to
certified value.
Autotrim not working properly.
Check for normal autotrim response to
induced effort on control wheel. Check
trim sense signal in diagnostics for
proper response to control effort.
Glideslope tracks with an
offset.
GS Offset not properly ad-
justed.
With simulated centered GS signal,
check GS offset adjustment in FCC
and readjust as necessary.
GS gain low due to improper
MM activity.
Check MM in diagnostics for proper
operation.
All roll modes have “wing
walk”.
Roll servo bridle cable below
minimum allowed tension.
Check and adjust bridle cable to certi-
fied value.
Roll servo slip clutch set below
minimum torque.
Check and adjust slip clutch to certi-
fied value.
Turn Coordinator has exces-
sive hysteresis or delay.
Replace Turn Coordinator.
Selected altitude display
dashed.
Invalid altitude code from al-
timeter.
Check altimeter interconnect (Gilham
code) in diagnostics. Replace altime-
ter, as required.
Roll default mode okay, but
heading mode performance
poor.
Directional Gyro or HSI has
faulty output.
Replace DG or HSI.
Heading mode tracks with
excessive offset.
Heading Offset not properly
adjusted.
With heading set to North, check
heading/course datum offset adjust-
ment in FCC and readjust as neces-
sary.
Localizer modes track with
offset.
LOC Offset not properly ad-
justed.
With simulated centered LOC signal,
check LOC offset adjustment in FCC
and readjust as necessary.
GPS modes track with off-
set.
GPS Offset not properly ad-
justed.
With simulated centered GPS signal,
check GPS offset adjustment in FCC
and readjust as necessary.
VOR modes track with off-
set.
VOR Offset not properly ad-
justed.
With simulated centered VOR signal,
check VOR offset adjustment in FCC
and readjust as necessary.
MET not operational.
If “PT” on FCC, MET switch
may be stuck active.
Using diagnostics, check that UP,
DOWN, and ARM switches are all in-
active when nor pressed.
To Next Page
Loading...
