SDR 95UAL900099

Service difficulty report · Pcu · Boeing 737522

Difficulty date: August 21, 1995
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N937UA
Make and model: Boeing 737522
Aircraft serial: 26668
Engine: Ge CFM56*
System (JASC): 2720 · Rudder Control System
Part: Pcu
Condition: Malfunctioned
Location: Rudder
Stage of operation: TO
Nature of condition: O
Precautionary procedure: O

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

What was found

ON ROTATION FROM ONT AT 128 KTS, SHARP RAPID LEFT YAW, NO RUDDER INPUT FELT ON RUDDERS, LASTED FOR 2 SECONDS, FELT LIKE ENGINE LOSS. REPLACED RUDDER PCU, ACCOMPLISHED MAX POWER RUN ON BOTH ENGINES, NO FAULTS FOUND. NO FAULT FOUND WITH PCU, UNABLE TO DUPLICATE.