Service difficulty report · Autopilot Sys · Cessna 750

Difficulty date
February 5, 2005
Submitted
February 9, 2005
Operation
Air carrier
Aircraft
N933QS
Make and model
Cessna 750
Aircraft serial
7500133
Aircraft time
3,899 hours, 2,457 cycles
Part
Autopilot Sys
Condition
Malfunctioned
Location
Cockpit
Stage of operation
CR
How discovered
O
Nature of condition
E
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DURING CRUISE, AUTOPILOT INPUTS FOR AILERON & UPPER RUDDER CONTROL OSCILLATES CONTINUOUSLY. TURBULENCE INCREASES THE INTENSITY & FREQUENCY OF OSCILLATIONS. APPLIED PRESSURE ON FLT CONTROLS (AILERON & RUDDER PRESSURE). ON CONTROL PANEL SYNOPTIC AILERON MOVES FROM NEUTRAL TO 1/3 "UP" AILERON POSITION. RESET RUDDER TRIM ACT. IAW 27-26-00. RESET LINK TO YAW DAMPENER TO NEUTRAL POSITION 7 PUSH PULL ROD TO RUDDER SUMMING LINK OUT PUT TO NEUTRAL. RESET RUDDER COMMAND BUNGEE TO NEUTRAL IAW 750 MM 27-20-00. RESET UPPER "B" RUDDER RTV TO NEUTRAL IAW 750 MM 27-24-01. RESET TRIM INDICATOR TO NEUTRAL IAW 750 M/M CHAP. 27-14-01. ACCOMPLISHED RUDDER RIG CHECK IAW MM 27-00-00. CHECKS GOOD.

More about the Cessna 750