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The Century 4000 has been designed and manufactured to render reliable service; however,
some of the system components will require a regular inspection and service. It is important
that agencies selected for service are properly qualified and equipped to render service on the
Century 4000.
We have listed several items below to assist you in monitoring you system maintenance.
1. Gyro Filters - The gyros used with the Century 4000 are precision devices whose
performance and service life are in part dependent upon the quality of the air supply. Poor
air quality can significantly reduce gyro life (to hours) and performance by contaminating
bearings. Regular filter maintenance is good investment.
2. Aircraft Static Systems - Air leaks and water entrapment can significantly affect altitude hold
performance. Static System maintenance and checks help not only the AFCS, but assure
proper function of static instruments. Altitude Hold units used by Century Flight Systems,
Inc., should NOT be disconnected during static system checks as they are designed to
withstand such test without damage.
3. Periodic inspection and maintenance is recommended for those items of the autopilot which
attach to the aircraft control systems. During normal inspection is a good time to make
these simple checks on the autopilot.
A. Inspect the bridle cable on the Pitch, Roll, and Yaw Servos for
1.
Condition
2.
Tension
3.
Freedom - move controls through full range of travel.
B. Inspect bridle Cable clamps for:
1.
Obstruction.
Bolt Torque - 55 ± 5 inch pounds of torque. Note:
2.
FAA
3.
Gap between clamp halves - .005" minimum, assures that cables are under
clamping pressure.
C. Inspect Trim Capstans for:
1.
Evidence of wear
2.
The clutch should slip instead of cable on capstan if overpowered.
D. Inspect Trim Cables for:
1.
Fraying
2.
Proper tension (high end of spec is usually best).
3.
Freedom of travel.
Check the Flight Manual Supplement located in the Installation Manual for the C4000.
MAINTENANCE
approved and required.
EMERGENCY OPERATION
This higher than normal is
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