SDR 2000UALA00221

Service difficulty report · Pcu · Boeing 737522

Difficulty date: May 28, 2000
Submitted: October 4, 2000
Operation: Air carrier
Aircraft: N950UA
Make and model: Boeing 737522
Aircraft serial: 26695
Aircraft time: 21,938 hours, 13,826 cycles
Engine: Ge CFM56*
System (JASC): 2720 · Rudder Control System
Part: Pcu
Condition: Failed
Location: Rudder
Stage of operation: NR
How discovered: O
Nature of condition: F
Precautionary procedure: O

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

What was found

RIGHT RUDDER PEDAL DEFLECTED FORWARD APPROXIMATELY 2 INCHES THEN BACK TO NEUTRAL. *S/D* REMOVED AND REPLACED THE FOLLOWING: YAW DAMPER COUPLER, MAIN RUDDER PCU & STANDBY RUDDER PCU. MEGGERED WIRES FROM YAW DAMPER COUPLER TO P5-3 PANEL, AND TO RUDDER PCU. PERFORMED GROUND FUNCTIONAL TEST OF AUTOPILOT SYSTEM. CHECKED YAW DAMPER CONNECTOR FOR CORROSION AND FLUID CONTAMINATION AND ALL PIN TENSIONS. REMOVED FLIGHT RECORDER AND SENT TO NTSB.