MAY 2015 Chapter 22 Autopilot Page 22.11
22-62 Special Maintenance and Inspections (continued)
A. Troubleshooting (continued)
PROBLEM ACTION
Cyclic vibrates erratically, SAS does not
disengage.
Manually override SAS, system should
disengage automatically.
Contact RHC Technical Support.
Helicopter enters low frequency pitch
oscillation when ALT engaged; helicopter
diverges nose-up or nose-down when ALT
engaged.
Return computer to RHC.
ILS glideslope tracking performance is
poor.
Check for excessive friction in longitudinal
cyclic.
Check GPS output to computer.
Cyclic force seems higher than normal
with SAS disengaged.
Verify servo clutches are disengaged, and
clutch arms do not move when SAS is Off
or in standby-mode.
No aural warning in headset when SAS is
disengaged.
Check wiring to unswitched audio input to
audio panel.
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